The SecsEquip class library is designed to provide a high-level
starting point when deploying SEMI standard GEM-compliant SECS
equipment
interfaces using the Java 2 Platform. Without any customization, the
software
implements almost all of the Fundamental GEM Requirements and the
Additional
GEM Capabilities. Method calls are provided for the developer to add
his
own Status Variables, Equipment Constants, Alarm Definitions, and Event
Definitions to complement the existing items specified in the GEM
standard.
The developer registers callbacks to receive asynchronous inputs such
as
Remote Command invocations, Terminal Display invocations, or the
reception
of any SECS message type of his choosing. Other callback
mechanisms
are used to provide Status Variable or Equipment Constant values needed
for satisfying Host requests and for sending dynamic Event Reports.
In order to run the application, you need to have either the Java 2 SDK software installed, or the Java 2 runtime installed. If you are not using a development environment provided by a third party, you can download the Sun J2SE JDK 6.0 software from java.sun.com.
Our distribution was developed and tested on up-to-date Windows Professional versions such as Windows XP Pro or Vista Pro. The software is designed for portability to other platforms, and is also been tested on up-to-date Linux systems. Customers who intend on using other platforms should contact Hume Integration so that their compatibility and testing requirements are known.
The SecsEquip Java software uses the SECS/GEM application files provided in the Hume Datahub SDK product. The developer needs to install the Hume Datahub SDK, and specify on the SETUP screen that the GEM/SECS applications should be installed. The SecsEquip software is able to find the Datahub SDK files using the environment variable DMH_BIN which is set when the Datahub SDK is installed. The situation is simpler for a runtime deployment of your equipment application. Instead of installing the Datahub SDK , you can simply deploy a single file executable, SecsServer.exe (SecsServer on non-Windows platforms). This file is provided by Hume Integration for the usual case of using the as-provided SDK files. If you have customized the SDK files, you are able to create a custom version of SecsServer.exe using a build script. We encourage you to use the full SDK during development so that you have the toolset documentation, the debugging tools, and you are able to view the SDK GEM application source code. When you are ready for deployment, you can download the SecsServer.zip archive from the Hume customer support website to obtain the SecsServer program and its build script.
DMH_JAVA_TCLDIR=C:/usr/local/gem2/serverIn a runtime deployment, the SecsServer executeable file is placed in a directory of your choice as specified by the DMH_JAVA_TCLDIR environment variable. The default directories used for process program transfer and trace logging are subdirectories of where the SecsServer or SecsServer.tcl file is found.
Coding is easier if you add the statement import com.hume.SECS.*; to the import statements of your application source code. By doing this, the package name, com.hume.SECS, can be omitted from name references. You will typically want to add the statement import com.hume.DMH.TclList; to make it convenient to use the TclList class.
Your primary focus as a developer is using the class SecsEquip. This class implements public methods to send and receive SECS messages, and manage an equipment SECS interface.
Here is the general flow of using and configuring a SecsEquip instance as seen in the EquipGUI.java source code:
SwingUtilities.invokeLater(new Runnable() {public void run() { GuiXXXUpdate(); }})
As general guidance, when you expect a string value, you will get a
two element list, of the form "A:n {this is n chars of text}". If
a string value does not have imbedded white space, it may be formatted
without braces, such as "A:8 OneToken". When you use the TclList.listElement
or split methods to parse the text, they take care of parsing and
removing
surrounding braces for you. If an empty string is sent, you will
see a one element list, A:0. SECS has the notion of array data -
0 or more values of a given type. When you expect to receive a
single
numeric value, you receive a two element list, with the type code as
the
first element, such as "U4:1 290". You can also receive an empty
array "U4:0" or an array with more than one value as in "U4:3 0 1
2".
Binary data values are formatted using C-language hexadecimal integer
notation,
for example, "B:3 0x00 0x01 0x02". You can use the binToInt
method to convert these values to integer values. With received
data,
the type code has a length value appended to it after a colon.
With
data that you format for sending, the length information is optional,
the
data is parsed to determine the length. See the TSN.html
document for more details.
| Semi Octal type code | TSN type code | Meaning & Examples |
| 00 | L | List, L, L:0, "L {A {atc 100}} {A 1.0.0}", "L:2 {L:2 {U4 200} {U4 210}} {B 0}" |
| 10 | B | binary - unsigned 8 bit data, "B 0", "B 1 2 3" |
| 11 | TF | boolean data, TSN type codes BL or BOOLEAN are also accepted as input, "TF 1" |
| 20 | A | Character string data. Traditionally this has meant
printable
ASCII characters but some implementations are sending any 8 bit
characters
including nulls using this type. "A {hello world}", "A hello" |
| 21 | J | Japan International Standard (JIS-8) encoded text. This format is not commonly used or supported because in the past the SEMI standards have failed to identify specific reference documents. |
| 22 | V1..VE | Variant data, also known as Localized Character Strings. Your Java unicode text is automatically converted into the chosen encoding. V1 is for Unicode 2.0, V2 is for UTF-8 encoding. See the TSN.html document for more details. "V1 {sent as Unicode}" |
| 30 | I8 | 8-byte signed integer, use hex notation for the value, "I8 0x123456789abcdf01" |
| 31 | I1 | 1-byte signed integer, "I1 -3" |
| 32 | I2 | 2-byte signed integer, "I2 99", "I2 15 -7 99" |
| 34 | I4 | 4-byte integer signed, "I4 -5" |
| 40 | F8 | 8-byte floating point, "F8 6.02e23", "F8 0.1" |
| 44 | F4 | 4-byte floating point, "F4 1.0" |
| 50 | U8 | 8-byte unsigned integer, use hex notation for the value, "U8 0x7fffffffffffffff" |
| 51 | U1 | 1-byte unsigned integer, "U1 0" |
| 52 | U2 | 2-byte unsigned integer, "U2 512" |
| 54 | U4 | 4-byte unsigned integer, "U2 979" |
Similarly, the variables required for GEM compliance are already defined, and are listed in a table . In some cases, such as the PPExecName variable, your custom application logic has to provide current data values. The example application demonstrates using the variableSet method or the variableMethodSet method as techniques to supply variable values. If a data item's value is changed infrequently, its more efficient to use variableSet which provides the current value to the SECS server process. The variableMethodSet method is the right choice for data items whose value changes more often, or are easier to manage as Java application data items.
The SecsEquip software uses type U4 numeric identifiers for the numeric IDs called out by GEM such as ALID, CEID, ECID, and SVID. These identifiers are passed as unsigned, 4 byte integers - SEMI Octal code 54.
There also are some standard event report types specified by
GEM and
pre-defined for you as listed in a table.
Your application logic needs to call eventPost
as these events and your own defined events occur during processing.
Logic in your application can send SECS messages or initiate conversations using the sendSecsMsg method. For HSMS communication, if you are sending a message and not waiting for the reply, sendSecsMsg can be used from your GUI code without fear of making your GUI unresponsive. In some cases you need to wait for a SECS reply message. If you are using HSMS, under most circumstances, the reply or failure to reply will be resolved within a few seconds. The unusual circumstance is that you still have a TCP/IP connection so your send is successful, but then there is no reply, and you wait the full T3 period. If the risk of this delay is not acceptable, you can create a new thread, and use the new thread to perform the SECS conversation where you need to wait for the reply message.
The Equipment OEM developer will need to be mindful of the standard
when using the Hume SecsEquip class in order to insure that compliance
is fully met.
| Fundamental GEM Requirement | Implemented | Gem Compliant | Implementation Notes |
| State Models | Yes | Yes | The Communication State model is implemented by the SecsEquip
and controlled
by calling the commEnable and commDisable
methods. The current Communication State value is readable as the
property, CommState. Your application
receives
notification of CommState and similar state changes by handling the
SecsEquip StateChange
event. This event notifies you of important changes such as
communication
with the Host starting or ending.
Your logic and your Operator GUI affect the Control State by setting the ControlIntentOnline and ControlModeRemote properties. The ControlStateStartup property is used to determine startup state. The standards require the persistent configuration of the communication connection properties, communication enablement, and the control state start properties. The example application uses the methods startupSave, startupLoad and startupRestore, and the StartupDialog class for this purpose. You may substitute your own configuration and persistence mechanisms or use the provided ones. Comments on the Process State model follows in the next row. Other equipment models such as Spooling are described below in this table. |
| Equipment Processing States | Yes | Yes | The example application fully implements a Process State model that you can copy and modify. Follow the example as far as posting standard GEM events for Process State changes and related events such as selecting a different Process Program. You also need to update Status Variables to keep track of the previous and current process states, just as the example application demonstrates. |
| Host Initiated S1F13/F14 Scenario | Yes | Yes | This behavior is fully provided by the SecsEquip class. |
| Event Notification | Yes | Yes | Your logic needs to call the eventPost() method at the occurrence of standard collection events. You may choose to define and report additional event types for the activities of your equipment. |
| On-Line Identification | Yes | Yes | You are obligated to set the property values MDLN and SOFTREV to reflect the hardware and software configuration of the equipment. Any change in the equipment software should result in a new unique value of SOFTREV. |
| Error Messages | Yes | Yes | The standard requires use of Stream 9 Error reporting. The SecsEquip sends specific Stream 9 messages for communication faults, conversation timeouts, incorrect device ID, unhandled message stream or function types, and non-standard data. In the custom message handling logic that you write, use the method sendS9 to send error messages when the received message data is not in the expected format or has improper values. |
| Documentation | Yes | Yes | Hume Integration has example documentation which meets
requirements
of the GEM and SECS standards. This documentation is provided to
Equipment providers with permission to create derivative works.
The SECS Server has the ability to export HTML documents of the configured event, alarm, and variable table data. You may want to use this feature of the table window that is display by executing the debugTableWindow method. |
| Control (Operator Initiated) | Yes | Yes | Use the JavaEquipApp application as a worked example. The startup control state is settable using the property ControlStateStartup. The operator choice of ON-LINE or OFF-LINE control is settable as the boolean property value ControlIntentOnline. The desired substate of ON-LINE control, LOCAL or REMOTE, is settable as the boolean property ControlModeRemote. The actual control state value reflects interaction with the Host and is readable as the property ControlState. Your application receives notification of ControlState and similar state changes by handling the SecsEquip StateChange event. |
| ADDITIONAL CAPABILITIES | |||
| Establish Communications | Yes | Yes | This behavior is fully provided by the SecsEquip class. |
| Dynamic Event Report Configuration | Yes | Yes | This behavior is fully provided by the SecsEquip class.
With the capabilities that involve Status Variable values (SV) or Data Variable values (DVVAL), your job is to add equipment specific variables using the variableAdd method. You either provide their values through a callback using variableMethodSet or by calling variableSet when their values are changed. |
| Variable Data Collection | Yes | Yes | This behavior is fully provided by the SecsEquip class. |
| Trace Data Collection | Yes | Yes | This behavior is fully provided by the SecsEquip class. |
| Status Data Collection | Yes | Yes | This behavior is fully provided by the SecsEquip class. |
| Alarm Management | Yes | Yes | This behavior is fully provided by the SecsEquip class. Your job is to add equipment specific alarm types using the alarmAdd method. You use the method alarmSet to indicate when an alarm condition is set or cleared. You can optionally use the method alarmEnable to enable or disable reporting of an alarm type as a Stream 5 message. Gem also requires event reports for the Alarm Set and Alarm Clear events. These event definitions are automatically created and managed for you by the SecsEquip when you use the alarmAdd method. |
| Remote Control | Yes | Yes | The example application shows how to use messageTypeAdd to receive and process Remote Commands (S2F21, S2F41, or S2F49) in your application code. You need to implement control logic that is mindful of the Process State model and the Control State model. For example, you need to disallow Remote Commands that affect processing when you are in the Online Local Control State. |
| Equipment Constants | Yes | Yes | This behavior is fully provided by the SecsEquip class. Your job is to add equipment specific constants using the parameterAdd method. You call parameterSet if your GUI logic or controller logic changes the value so that the SECS Server can update the ECIDChangeName GEM variable, and issue the GEM "Operator Equipment Constant Change" event. If the host changes an Equipment Constant, you are notified via a ParameterChange event. |
| Process Program Management | Yes | Yes | The SecsEquip class fully implements process program management features with upload and download capabilities. You can set the directory used for process programs as the property ProcessProgramDirectory. You can set whether process program data is transferred as binary or text using the ProcessProgramTypeBinary property. Your application is notified of process program change events by handling the SecsEquip StateChange event. You will receive notice when recipes are downloaded from the host, uploaded to the host, or deleted by the host. You can use these notifications to trigger validation of downloaded recipes, or you can defer validation until the time the process program is loaded for use. |
| Material Movement | Yes | Yes | The GEM standard only requires that the equipment provide
Data Collection
events when material is sent from any port on the equipment, or
received
by any port, whether the transfers are automated or manual.
Automated Material Movement is implemented by calling the method messageTypeAdd and registering a callback for each of the primary message types that the host sends. In your callback, you parse the received SECS message data using the TclList.split() and TclList.listElement methods. You send reply messages using the sendReply method. You initiate your own primary messages and optionally wait for the SECS replies using the sendSecsMsg method. |
| Equipment Terminal Services | Yes | Yes | The example application for the SecsEquip demonstrates displaying data received from the host, sending acknowledgment events, and sending display data to the host. For your own implementation, use the method terminalDisplayAck to send acknowledgment events, and follow the example code for sending input data to the host using sendSecsMsg. |
| Clock | Yes | Yes | The SecsEquip component fully implements a host-settable Clock variable value with standard data format choices. The implementation does not affect the system clock, the host's setting is saved as an offset. |
| Limits Monitoring | No | See the notes for Material Movement, above, to understand the general approach that is taken to implement this capability. | |
| Spooling | Yes | Yes | The SecsEquip component fully implements Spooling. We
recommend
that the equipment supplier only allow spooling of Alarm messages, and
Event report messages or similar messages where there is no control
logic
tied to the receiving of the reply messages. These are exactly
the
message types that most factory CIM workers want to collect with
spooling.
If restricting the spooled message types is not done, there are complex
issues with implementation and timing that cannot be adequately tested
and verified correct. The standard describes allowing the
spooling
of nearly any primary message type, out of consideration that any
message
may occur when the spool is being unloaded, and it should take its
proper
sequence at the end of the spool. In practice this is a rare
circumstance
because an HSMS implementation can unload thousands of messages in a
few
seconds. The downside of allowing messages that have control
implications
to be spooled is that they are queued for a variable and potentially
lengthy
delay before delivery. The equipment provider's job is to provide
a robust control system, and we think that knowing immediately that a
near
real-time message conversation cannot be initiated is the right
choice.
The Equipment provider can add to the message types allowed for spooling using the SpoolingAllow property. The default behavior is to allow only Stream 5 (Alarms) and Stream 6 (Event reports) to be spooled. |
| Control (Host-Initiated) | Yes | Yes | The SecsEquip class fully implements this behavior. |
| Property Access | Description |
| String getCommState() | Read-only value of your GEM Communication State. Possible values are DISABLED, ENABLED {NOT COMMUNICATING}, and COMMUNICATING. The StateChange event is used to obtain asynchronous notification of this property value change. |
| int getConnectionType() void setConnectionType(int v) throws Exception |
Configures the basic choice of connection type. The value1993 is for non-standard Draft HSMS, and 1995 is for standard HSMS. The default is 1995. An exception is thrown if an inappropriate value is set. We suggest you use the methods connectTypeHsmsPassive() and connectTypeHsmsActive() instead of setting individual properties and then calling this method. |
| boolean isControlIntentOnline() void setControlIntentOnline(boolean b) |
Whether your intended GEM Control State is ON-LINE and interacting with the host or OFF-LINE. The default setting is false, meaning OFF-LINE. |
| boolean isControlModeRemote() void setControlModeRemote(boolean b) |
When in ON-LINE control, whether your intended substate is REMOTE or LOCAL. The default setting is false, meaning LOCAL. |
| String getControlState() | A read-only value of the actual GEM Control State, which reflects your ControlIntentOnline value, your ControlModeRemote value, and host dynamics. Possible values are ON-LINE LOCAL, and ON-LINE REMOTE, OFF-LINE Equipment, OFF-LINE Host, and OFF-LINE SeekOnline. |
| int getControlStateStartup() String getControlStateStartupText() void setControlStateStartup(int StateIndex) throws Exception public static final int CS_OFFLINE_EQUIPMENT=0, |
Your software is able to specify the initial state for the GEM Control State model. The choices are CS_OFFLINE_EQUIPMENT, CS_OFFLINE_ATTEMPT_ONLINE, CS_OFFLINE_HOST, CS_ONLINE_LOCAL or CS_ONLINE_REMOTE. The default setting is CS_OFFLINE_EQUIPMENT but this value may be automatically changed when commEnable() is called to be consistent with your ControlIntentOnline and ControlModeRemote values. If your ControlIntent is OFF-LINE, and your startup is an Online state, the startup state is changed to CS_OFFLINE_EQUIPMENT. If ControlIntentOnline is true and your startup state is CS_OFFLINE_EQUIPMENT, your startup state is changed to CS_OFFLINE_ATTEMPT_ONLINE. Similarly the setting of ControlModeRemote can overrule an online startup state corresponding to the opposite LOCAL or REMOTE online substate choice. The ControlState String values are enumerated in the SecsEquip.ControlStateText array as indexed by the integer constants representing the substates. You can use the getControlStateStartupText() method to obtain the string value of the startup state. |
| int getDEVID() void setDEVID(int DEVID) throws Exception |
The SECS Device ID. An identifier imbedded in SECS header data usually left at the default of 0. You can change the Device ID at any time, but if you change it while communicating, you may create problems for the host software. Settable range is 0..32767. |
| static DmhClientItf getDmh() | SecsEquip instances use a shared connection to the DMH message system in order to communicate with the SECS server process. The connection instance is available in case you want to access it in your application for custom purposes. |
| static String getDmhGroupName() | The DMH message system groupname used by the SECS server. The same groupname should be specified to the constructor of every SecsEquip instance in the application in order to share the same SECS server process. |
| String getHsmsHost() void setHsmsHost(String host_or_ip_addr) |
For an active HSMS connection, specifies the TCP/IP hostname or IP address of the passive computer. The default value is "localhost" which is a standard way of specifying your own computer. |
| boolean isHsmsPassive() void setHsmsPassive(boolean passive) |
For an HSMS connection, whether the SecsEquip plays the passive, TCP/IP server role. The default value is true since the usual role for the equipment is passive. |
| int getHsmsPort() void setHsmsPort(int p) |
For an HSMS connection, the TCP/IP socket port number. Defaults to 5555. |
| boolean isIdRangeChecked() void setIdRangeChecked(boolean b) |
By default, the methods to add Alarm, Event, Variable, and Parameter definitions, restrict the numeric ID values allowed to ranges which prevent you from colliding with built-in values, or colliding with each other's values. However, the range checking can be disabled by setting this property value false. Also, you can renumber the built-in events and variables, and customize the events that are assigned for alarm set and clear events. Thus, you are able to completely customize the identifiers used by the SECS interface. If you choose to renumber and customize the identifiers, do it in your initialization logic before enabling communication, but after restoring or configuring the connection type. This insures that connection instance data exists in the SECS server to hold your customization. |
| String getMDLN() void setMDLN(String mdln) throws Exception |
The SECS Equipment Model Type - limited to no more than 6 characters by the E5 standard. |
| String getName() | The SecsEquip name passed to the constructor and used in the SECS server process as a Tcl command name, a global array name, and an identifier in SQL table records. |
| boolean isParameterSetSaved() void setParameterSetSaved(boolean b) |
This property controls whether the parameter values are saved at the program exit and restored during the next session. Parameters are also referred to as Equipment Constant Variables (ECVs). Saving the values of Parameters is standard GEM behavior so the default value is true. If the value is true, the saved value data is restored the first time that commEnable is called, unless it has been already restored by calling the method parametersRestore. In other words, you can use the method parametersRestore to force loading of the saved parameter values before commEnable is called. The value data is saved as a file of SQL statements in the subdirectory spooldata. The filename used is "EcvParms_" + Name + ".sql". |
| String getProcessProgramDir() void setProcessProgramDir(String path) |
A pathname to the file system directory where Process Program files are located. The default value is the relative subdirectory "recipes" of the directory where the SECS server is executing. Note that by default, each equipment interface shares the same directory for Process Program files. Reading this property returns the absolute directory path to the process program directory. The value can be set using a relative or absolute pathname. |
| boolean isProcessProgramTypeBinary() void setProcessProgramTypeBinary() |
A boolean flag to indicate whether Process Program files should be transferred as type B (binary) data, or type A (ASCII) data. The default is true, meaning binary transfer. If Process Program files are printable text, the type A transfer is easier for the factory personnel to work with. The software is able to transfer binary data as type A but not all host software can accommodate this. |
| boolean isReportConfigSaved() void setReportConfigSaved(boolean b) |
This property controls whether the state of event reporting is saved at the program exit and restored during the next session. Saving the state of dynamic reporting is standard GEM behavior so the default value is true. If the value is true, the saved event reporting configuration is restored the first time that commEnable is called, unless it has been already restored by calling the method reportsRestore. In other words, you can use the method reportsRestore to force loading of the saved reporting configuration before commEnable is called. The report configuration data is saved as a file of SQL statements in the subdirectory spooldata. The filename used is "reportdata_" + Name + ".sql". |
| boolean isS13InUse() void setS13InUse(boolean b) |
This boolean property chooses whether to enable using Stream 13 large process program transfer message types when an online control state exists. In addition to the Stream 13 messages, this property also enables or disables using S7F29, S7F37, S7F38, S7F41, and S7F42 which are used with Stream 13 for transferring large unformatted, process programs. The default value is false. Stream 13 message types are preferred for transferring large data sets because the data is split into multiple smaller messages which require less memory use. If Stream 13 message types are enabled, per GEM your application should implement sending S7F27 process program verification messages for received process programs. |
| String getSOFTREV() void setSOFTREV(String softrev) throws Exception |
The SECS Software revision - limited to no more than 6 characters. Default value is"1.0.0". You may wish to consider a pattern of major.minor.patchlevel. |
| String getSpoolingAllow() void setSpoolingAllow(String v) throws Exception |
This property is set to specify the streams which the host is allowed to specify for spooling in message type S2F43. It is formatted as a space separated list of "S<s>" tokens where the <s> value is stream number. The standard does not allow Stream 1 to be spooled. The default value is "S5 S6" which allows for spooling alarm messages and event reports. An empty string value disallows any spooling. The value only affects the handling of S2F43 messages from the host. Your software is able to change at any time which message types are being spooled using the method, SpoolStreamFns. |
| String getState() | A read-only value of the low-level connection state. Possible values include OFFLINE, LISTENING, and COMMUNICATING. You will see the OFFLINE state if the connection to the host is broken. The StateChange event is used to obtain asynchronous notification of this property value change. |
| int getT3() void setT3(int v) throws Exception |
SECS Reply Timeout in milliseconds, range 1000..120000, default 45000 |
| int getT5() void setT5(int v) throws Exception |
HSMS Connect Separation Timeout - the delay between re-connection attempts in milliseconds, range 1000..240000, default 10000 |
| int getT6() void setT6(int v) throws Exception |
HSMS Control Transaction Timeout in milliseconds, range 1000..240000, default 5000 |
| int getT7() void setT7(int v) throws Exception |
HSMS Not Selected Timeout in milliseconds, range 1000..24000, default 10000 |
| int getTraceBits() void setTraceBits(int traceBits) |
Used as a bitfield to control diagnostic trace information
for SECS
port activity which is passed to the application in the SecsTrace
event.
By setting specific bits, the corresponding output is turned on.
General Tracing: (TraceType = trace) Receive Tracing: (TraceType = rtrace) Send Tracing: (TraceType = strace) |
| RcResult setTraceSaving(boolean save, boolean
compress, int
maxDayFiles, String saveDir, String zipCmd)
public class RcResult { boolean isTraceDataSaved() boolean isTraceDataCompressed() String getTraceSaveDir() int getTraceSaveMaxDayFiles() String getTraceSaveZipCmd() |
The toolset software has the configurable feature of
continuously saving
the SECS communication trace data to files - one file per day, up to a
maximum number per year, and optionally compressing the closed file
from
the previous day shortly after midnight. The setTraceSaving
method is used to reconfigure the logging feature with the various
properties
being set atomically in one call. The saving logic writes each day's
output
to a distinct file, in the directory named by the saveDir
argument.
The maxDayFiles argument controls how many day files are saved
per
year. It can be configured between 1 and 366. When file
saving
is initiated, the output filename is set to traceNNN.txt
where the NNN value is the current day of the year, 0 to 365,
modulo
the maxDayFiles value. If this file already exists and
has
been written to earlier in the same day, then the output is appended to
it, otherwise the file is created as a new file. Note that if the maxDayFiles
value is set to 1, each day's output is saved to the same filename, trace000.txt.
The default values provide for saving the data from each connection in
a separate directory. Separate directories are required for each
connection. When trace data is being written, the compress
argument controls whether the logic attempts to compress the output
file
when it is closed at the end of the day (midnight). For
compression
to occur, the maxDayFiles value must be greater than 1 and a
non-blank
compression command must exist as the zipCmd argument.
The
default assignment of zipCmd is similar to zip -m tracetxt.zip.
This command causes the data file from the previous day to be moved
into
the tracetxt.zip archive, creating the archive if it does not
exist.
The compression logic appends the day file name to the configured
command
before execution. Only trusted persons should be allowed to
configure
the compression command because of the security considerations.
The RcResult return value of setTraceSaving() is used as follows. If the rc value is less than 0 the arguments were not acceptable and an error message is provided as the result String. If the rc value is 0, the call succeeded. If the rc value is greater than 0, the call succeeded with an advisory message as the result String. For example, a message occurs if compression is set true but there is a maximum of only 1 file, so there is no distinct file for the previous day to compress. |
| int getTracewinMaxWidth()
void setTracewinMaxWidth(int ctChars) throws Exception |
The approximate maximum number of characters to display in a single line of the trace window. This value guards against excessive data use when long messages such as recipe transfer occur and the trace window is displaying connection activity. Range 1000..120000, default 4000. |
| int getVarValueTimeout() void setVarValueTimeout(int milliseconds) |
When you define a variable using variableAdd() and you use the variableMethodSet() method to register a callback that supplies the value of the variable, there is an internal timer that is used to limit the time allowed for your callback to execute and provide the value. The default timeout value of this timer is 20000 milliseconds. Under unusual circumstances, your callback evaluations may require more time, and you can modify this timer value. |
| Event Handler and Argument Data | Description |
| All event handlers - NOTES
|
Java supports callback functions through the use of interface
declarations. You declare a class as implementing a particular
interface
type. Then you are able to pass references to instances as
arguments
to indicate the object which should be notified by the callback.
If this is new to you, take a close look at our example application
code.
The Interfaces we use are declared in separate java files, each named for the Interface type name, in the com.hume.SECS directory. We have adopted the convention of appending Itf to interface type names to make it easy to identify which files contain interface declarations. Unless noted otherwise, you should assume that the callback method is executed by a different thread than the main GUI thread of your application. See the notes on threading in the Development section above. When the event happens, your callback interface method is called. |
| public interface ParameterChangeItf { public void parameterChange(SecsConn sp, String name, String newvalue); } ParameterChangeItf onParameterChange(ParameterChangeItf handler) |
This event notifies you of host initiated Equipment Constant
Variable
(ECV) changes. The new value is within the limits you have
configured.
Use the onParameterChange() method to install your own handler. The return value is the previous handler that you are replacing. |
| public interface SecsMessageReceiveItf { public void secsMessageReceive(SecsConn sp, int stream, int func, boolean sendReply, int transactionID, String data, String header); } |
See the messageTypeAdd method described in the next section to see how to receive SECS messages in your application. This mechanism is demonstrated for Remote Commands and for Terminal Services in the example application. |
| public interface SecsTraceItf { public void secsTrace(SecsConn sp, String traceType, String text); } SecsTraceItf onSecsTrace(SecsTraceItf handler) |
This event provides you with the detailed information of SECS
message
traffic that is viewed in the SECS Trace window - see the traceWin
method. The flow of information is controlled by setting
the
TraceBits property. You can cast the SecsConn argument to a
SecsEquip
if you want to use a method that is defined by the SecsEquip class and
not the SecsConn base class.
Use the onSecsTrace() method to set your own handler. The return value is the previous handler which you are replacing. |
| public interface ServerErrorItf { public void serverError(String message); } ServerErrorItf onServerError(ServerErrorItf handler) |
The SecsConn class reports Tcl programming errors that are
trapped
in the SECS Server process as ServerError events. An example
would
be trying to send an improperly formatted SECS message. These
error
events will happen during development but are not expected once the
code
is debugged.
Use the onServerError() method to set your own handler. The return value is the previous handler which you are replacing. |
| public interface SpoolingAlertItf { public void spoolingAlert(SecsEquip sp, String msgid); } SpoolingAlertItf onSpoolingAlert(SpoolingAlertItf handler) |
The GEM standard describes Spooling events that are to be
brought to
the attention of the equipment operator. The msgid values include
SPOOLING_ACTIVATED, SPOOLING_FULL, SPOOLING_TERMINATED,
SPOOLING_NOT_PERSISTENT,
and SPOOLING_DATA_DISCARDED. See the example explanation messages
in the application. The latter two values are not seen in normal
circumstances.
Use the onSpoolingAlert() method to set your own handler. The return value is the previous handler which you are replacing. |
| public interface ValueChangeItf { public void valueChange(SecsConn sp, String varName, String newValue); } ValueChangeItf onStateChange(ValueChangeItf handler) |
This event notifies your application of state value changes.
Possible varName
values include
Use the onStateChange() method to set your own handler. The return value is the previous handler which you are replacing. |
| METHOD | DESCRIPTION |
| General Comments
|
The SecsEquip class extends the SecsConn class. Public
methods
of both classes are shown here for convenience.
The TclList class is documented with the Hume Java classes for DMH communication. |
| void alarmAdd(int ALID, String ALTX) throws Exception
void alarmAdd(int ALID, String ALTX, int alarmSetCEID, int alarmClearCEID) throws Exception |
Add an alarm type definition. The first form is the
commonly
used choice for new SECS interfaces where the CEID's for the GEM Alarm
events are configured automatically. With this form, choose even
numbers for the ALID between 1000 and 3998. Newly created alarms
are enabled. Per GEM, two enabled events are created for each
alarm,
an alarm set event with CEID == ALID, and an alarm clear event
with
CEID == ALID+1. The ALTX argument is a description of the alarm
and
it has a length limit of 40 ASCII characters. The ALTX should not
contain single quote characters.
The second form of alarmAdd() lets you specify the CEID values used for the Alarm Set and Clear event reports. Use this form if you need to customize which data collection events are posted for the alarm's Set and Clear events. If the event types do not already exist, they are created. There is no validation performed on the specified CEID values, they only need to be representable as 4 byte unsigned integers. With either form, you are able to bypass the usual range restriction of the ALID value by setting the property IdRangeChecked false. |
| void alarmEnable(int ALID, boolean is_enabled) | Enable or disable reporting of an Alarm type (S5F1). |
| boolean alarmIsEnabled(int ALID) | Test if the reporting of an alarm type is enabled |
| boolean alarmIsSet(int ALID) | Test if the alarmed state is currently set |
| void alarmSet(int ALID, boolean is_set) | Set or Clear the alarmed state of an alarm. |
| HubTableModel alarmTable() | This method returns current data from the SECS Server ei_alarm table for the SecsEquip instance. The columns of the table include: spname, ALID, is_enabled, is_set, and ALTX. The HubTableModel extends the Java swing AbstractTableModel and includes a refresh() method. It can easily be displayed in a JTable. |
| int binToInt(String binValue)
|
Converts a SECS B (Binary - Semi "10") data value usually formatted as a hexadecimal string to an integer value. |
| void close() | This method can be used to stop communicating and gracefully shutdown the instance. It is comparable to a destructor or finalize method, and the instance should not be used after it is called. The method leaves intact persistent file system data such as the state of spooling and reporting for future instantion. |
| void commDisable() | Disable SECS communication. The SecsEquip is initialized without communication enabled so using this method only makes sense after CommEnable has been called. |
| RcResult commEnable()
public class RcResult { |
Enables SECS communication. The CommState
property value will change and StateChange
events
will be received. These changes are the asynchronous indications
for success or failure to establish communication. When your
equipment
is configured for the Active HSMS role, field personnel will want to
display
the trace window with the 0x0002 TRACE
property
bit set in order to see detailed information on the status of
communication
attempts. If there is an error setting up the connection, the
return
code value will be non-zero, and the result field will be an error
message. |
| RcResult connectTypeHsmsActive(String host_or_ip, int port) | This method is the recommended alternative to setting the underlying property values to specify an active HSMS connection type, and calling ConnectTypeSet(). |
| RcResult connectTypeHsmsPassive(int port) | This method is the recommended alternative to setting the underlying property values to specify a passive HSMS connection type, and calling ConnectTypeSet(). |
| RcResult connectTypeSet()
public class RcResult { |
This method is called to use the current property values and initialize a SECS interface for the indicated connection type. It is called by the connectType<Type> methods. If you are setting connection property data directly, call this method after your property values are set. The method returns the value 0 to indicate success. If communication is enabled when this method is called, it becomes disabled as a result of setting up the new connection. If the return code value is not 0, then an error message is provided in the result field. |
| void debugDMHStatus(boolean show) | This method causes the DMH message system status window to either be shown or dismissed. |
| void debugInspect() | This method can be used to exec the Inspect introspection debugger if the Datahub SDK has been installed.. |
| void debugTableWindow(boolean show) | This method causes the Datahub table management GUI to be shown or dismissed. |
| void debugTclConsole(boolean show) | This method causes a console window for the SECS Server to be shown or dismissed. |
| void debugTraceWindow(boolean show) | This method is used to display a window which updates to show SECS message traffic and state information for the connection. There are menu options to control the data displayed, and menu actions to save the displayed data to the file system. This method invokes the Tcl version of the Trace window which is created by the SECS Server process. See the traceWin method to instantiate a native Java window with similar function. Making the Java version available in your application is desirable to help diagnose communication problems. |
| void delete() | The delete method is called when an instance is no longer wanted, and there is no intention of future use. The delete method disables communication as well as deleting data structures and resources used by the instance. It also deletes the interface's persisted data including the TraceSaveDir directory. The close method should be used instead of delete for a shutdown that does not delete persisted data. |
| void eventAdd(int CEID, boolean isReported, String
description)
throws Exception
void eventAdd(String eventName, int CEID, boolean isReported, String description) throws Exception |
This method is used to create an Event type. With the default range checking of ID values, you are restricted to use CEID values between 5000 and 9999 so you do not collide with Alarm Set and Clear events, or the built-in events. You can set the IdRangeChecked property false if you need to customize the assigned IDs. Events can be given meaningful names, and the names can be used when posting event occurrences. Choose names that are less than 32 characters and consist of alphanumeric characters and/or the hyphen or underscore. The first form of eventAdd() defaults the event name to the CEID value expressed as a String. The second form of the eventAdd() method allows you to specify your own event name value which should be unique among all of the event names for the SecsEquip instance. |
| void eventEnable(int CEID, boolean is_enabled) | Event reports are enabled for an event type when first created. You can use this method to control whether an event report is enabled. |
| boolean eventIsEnabled(int CEID) | Test if reporting of an event type is currently enabled. |
| void eventPost (int CEID)
void eventPostByName(String eventName) |
These methods are used to announce when an event has occurred. In general, make sure that the data items that the host might want in an event report are set to their proper values before eventPost is called. You should make this call without testing to see if reporting of the event is enabled and without other testing of the communication or control states. The two method forms allow for posting the event by its CEID or its name. |
| int eventRenumber(String eventName, int newCEID) throws Exception | This method is provided so that the CEID values of the
built-in events
can be customized. Use the method after restoring or configuring
the connection type, and before enabling communication. If the newCEID
value is in use by a different event, that event is given a "temporary"
ID value of the current value plus 1 million under the assumption that
it will be renumbered as well. After initialization, if events
are
found with ID values greater than 1 million, they indicate that more
than
one event has been assigned to the same ID value.
A positive return value is a warning, and the value 0 indicates success. In more detail, the return values and their meanings are:
|
| java.util.ArrayList<int []> eventReportLinks() | This method call returns a list of integer pairs for the current associations of event types and event report definitions. Each int [2] pair has the CEID value at subscript 0, and then the RPTID value at subscript 1. These association links are setup by the host using S2F35. They can also be setup using the reportLink method. This method supports helping you display or provide for editing of the event report configuration. |
| void eventUnlink(int CEID) | This method can be used to unlink (disassociate) any reports that are associated with an event type. The call can be used if your tool supports manual editing of event reports. |
| void messageTypeAdd(int stream, int function,
SecsMessageReceiveItf
callback)
public interface SecsMessageReceiveItf { |
Call messageTypeAdd() to have SECS messages processed
by your
custom handler methods when the SecsEquip is in the online control
state
and the messages are received from the host. The callback
argument specifies your application object that implements the SecsMessageReceiveItf
interface.
You can provide for new SECS message types, or you can replace the
built-in
handling of particular messages. Use the sendReply,
sendS9,
and sendAbort methods to send reply messages.
The arguments passed to your secsMessageReceive method
are: |
| void messageTypeRemove(int stream, int function) | This method is used to cancel SECS message handlers that you have setup using messageTypeAdd or to cancel the handling of particular messages during the online control state by the built-in SecsEquip logic. If you have called messageTypeAdd for the specified message type, the Add is cancelled. If you have not called messageTypeAdd, the SECS server is told not to handle the message. Unhandled primary messages are replied to with an abort reply. |
| void parameterAdd(int varID, String varname, String
description,
String valueTsn, String initialValue, String minValue, String maxValue, String defaultValue, String units) throws Exception |
This method is used to add Equipment Constant Variable
definitions
(ECVs). With the default range checking active, use varID
values
that are between 1000 to 2999. Use a unique value for each
parameter.
The valueTsn argument is the Tcl SECS notation type code for the ECV
value
such as F4 for floating point, or A:80 for an ASCII string up to 80
characters
long. Call parameterSet when the ECV
value is changed by your GUI or controller logic so that the SECS
Server
can manage the appropriate GEM event. With ASCII types, indicate
the maximum number of characters, n, that you wish to
allow
the host to set, by using a type code of the form A:n.
The value of n can be as large as 60000.
If you have custom ID requirements, you can set the IdRangeChecked property false to disable varID range checking, and you can renumber existing Parameters and Variables using the variableRenumber method. |
| String parameterGet(int varID) | This method is used to get the current value of an ECV. The return value is null if there is an unexpected error. |
| VariableInfo parameterGetInfo(int varID)
public class VariableInfo { |
This method returns the configuration data of an ECV. The return value is a VariableInfo data structure. |
| void parameterSet(int varID, String newValue) | This method is used to update the value of an ECV by your control logic. The SecsEquip software takes care of notifying the host with the appropriate GEM event. |
| void parametersRestore() | Restore the saved values of the parameters (Equipment Constant Variables). The parametersRestore() method gets called automatically when you first enable communication if property ParameterSetSaved is true, and parametersRestore() has not already been called. The call restores the values of parameters from the last session, and it initializes saving for the current session. There is logic so that restoring only occurs once. It is useful to make this call if you want to force the restore action to occur before communication is enabled. For example, this could support viewing the current values of the parameters before communication is enabled. The connection type should be set and all of the parameters should be defined before calling this method. |
| RcResult processProgramDownload(String
ppid)
public class RcResult { |
The equipment can initiate the
download of a process program
from the
host using S7F5R. The ppid
argument value is both the process
program
identifier and the file name that is used by the equipment for the
process
program file. There is no standard SECS message for the equipment to
know
what process programs are available for download. The return
value
is a two element structure, a return code and text. The return
code
is 0 for success, in which case the text will be the full absolute
pathname
of the process program file. Possible error codes include the
error
code values of sendSecsMsg() and the following: -10 file system error -11 improper data -12 denial by the host |
RcResult processProgramLargeRequest(String ppid) |
This method initiates the
download of a process program from the host using the message types of
Stream 13 which are designed for large data set transfers. Using
these messages is more complex than the usual Stream 7 transfer
messages so they are less commonly supported. The ppid argument value is both the
process
program
identifier and the file name that is used by the equipment for the
process
program file. There is no standard SECS message for the equipment to
know
what process programs are available for download. The return
value
is a two element structure, a return code and text. The return
code
is 0 if the transfer is initiated successfully as determined by the
host's reply to S7F41. The transfer is not complete when the
method returns. The large data set transfer logic receives
the downloaded file in the subdirectory, dataset_transfer, of the directory
set by the ProcessProgramDir
property. When the transfer is complete, there is a StateChange event with the name dataset_download and the newvalue being a two element list
consisting of the ppid value
and the full pathname to the newly received file. To fully comply
with the large process program transfer scenarios specified by GEM E30,
your application should react to the StateChange event by verifying the
newly received process program and sending the S7F27 Process Program
Verification message to the host using sendSecsMsg.
The S7F27 message is sent with replyIsWanted
true, but there is no reason to wait for the host's reply. After
verification, your application can move the file into the ProcessProgramDir for use, possibly
overwriting an earlier version. If the transfer does not complete successfully, there is additional status information is the SECS server table ei_dataset_xfer. It is possible to query this table or subscribe to data changes of this table to better integrate transfer status information. Possible error results include values of the ACKC7 reply to S7F41 and the following: 1 permission not granted 4 PPID not found 6 other error -6 error when sending S7F41 or receiving the S7F42 reply -13 PP transfers are disabled when spooling is active -14 A large PP receive is already in progress for ppid -15 Stream 13 transfers are disabled either from configuration or initialization failure -16 PPID is not usable as a restricted filename -17 error when parsing the S7F42 reply |
RcResult processProgramLargeSend(String filename) |
This method initiates the upload
of a process program to the host using the message types of Stream 13
which are designed for large data
set transfers. Using these messages is more complex than the
usual
Stream 7 transfer messages so they are less commonly supported.
The filename argument value
is both the process
program
identifier and the file name that is used by the equipment for the
process
program file. The return
value
is a two element structure, a return code and text. The return
code
is 0 if the transfer is initiated successfully as determined by the
host's reply to S7F37. The transfer is not complete when the
method
returns. The large data set transfer logic makes a
temporary copy of the file for transfer in the subdirectory, dataset_transfer, of the directory
set by the ProcessProgramDir
property. This allows your application to change or access the
process program while the copy is being transferred. When the
transfer is complete, there is a StateChange
event with
the name dataset_upload and the newvalue being the filename value. If the
transfer does not complete successfully, there is additional status
information is the SECS server table ei_dataset_xfer.
The
SECS Server also posts UploadSuccess,
UploadTimeout, and UploadFailure
data collection events that can be monitored as StateChange events with the name event. Possible error results include values of the ACKC7 reply to S7F37 and the following: 1 permission not granted 6 other error -4 PPID filename not found -6 error when sending S7F37 or receiving the S7F37 reply -13 PP transfers are disabled when spooling is active -14 A large PP receive is already in progress for ppid -15 Stream 13 transfers are disabled either from configuration or initialization failure -16 error copying the PPID for large send -17 error when parsing the S7F38 reply |
| RcResult processProgramUpload(String ppid)
public class RcResult { |
Equipment initiated request to transfer a process program to
the host
using S7F3R. The ppid
argument value is identically the file name
of the process program and the identifier for the process program. The
return value is a two element structure, a return code and text. The
return
code is 0 for success, in which case the text will be the pathname of
the
saved program.. Positive return code values are the ACKC7 data
values
sent by the host. Diagnostic text is provided in the result
string for all return code values. Possible return code values
include
those of sendSecsMsg and the following:
6 or greater, host indicated error code Important: Do not assume that the host saves process
program
files with the same file names or in the same format that the equipment
does. The only proper way to use an uploaded process program file
is to download it using the same host software that uploaded it. |
| int reportDefine(int rptID, int [] varIDs) | This method is optionally used to update, create, or delete
an event
report definition. If the varIDs array argument is null or empty,
the report configuration is deleted. The return values are:
0 - a new report created, 1 - an existing report updated, 2 - report deleted, -1 unexpected transaction error, -2 unknown variable ID, -3 invalid rptID. Any unsigned number can be used for a report ID (rptID) value. Manual editing of event reports, or the creation of built-in event reports is not required by GEM since dynamic reporting is provided. We recommend that you do not provide predefined, built-in reports. Let the host configure the reporting that is desired. If you do provide built-in reports, you have a complex situation since GEM specifies that the state of event eporting setup by the host is persistent. This means the saved and restored reports can delete your predefined ones. If you choose to implement built-in reports, we recommend that you add an equipment parameter (ECV) and make the user choose between having the built-in reports or having the saved reports defined at startup. Do one of the following to insure built-in reports are available: (1) Set the property ReportConfigSaved to false to prevent your built-in reports from being replaced by the restore logic, or (2) Call reportsRestore after your events and variables are defined, and then add your built-in reports after the restore logic has run. |
| void reportDelete(int rptID) | Delete an event report definition. The method reportsClear() can be used to delete all of the event reports. |
| int [] reportGetDef(int rptID) | Returns an array of the variable IDs in an event report definition. An empty array is returned if the report does not exist. |
| java.util.ArrayList<VariableInfo> reportGetInfo(int
rptID)
public class VariableInfo { |
Returns a list of VariableInfo structures for the variables in an event report definition. An empty list is returned if the report does not exist. |
| int reportLink(int rptID, int CEID) | This method supports optional manual editing of the event report configuration or providing for built-in event reports linked to specified events. The method is used to link or associate a report definition to an event type, causing the report to be sent as part of the event report message. Both the report and the event type should exist at the time the method is called. The return values are: 0 success, -2 invalid rptID, -3 invalid CEID, -1 unexpected internal error. |
| void reportUnlink(int rptID) void reportUnlink(int rptID, int CEID) |
This overloaded method is used to remove the link or association of a report and an event type. If just the rptID is specified, the report is unlinked from all event types. |
| void reportsClear() | This method erases any existing event report definitions, unlinks the event reports from event types, and disables the event reports that were linked to the deleted reports. The call also deletes any saved event report data, so it can be used to prevent or nullify the restoring of event reports from the previous saved session. The method is not usually called since saving and restoring the dynamic event report configuration is standard GEM behavior. |
| int [] reportsList() | The method returns an array of the report ID values for the current report definitions. |
| void reportsRestore() | The reportsRestore() method gets called automatically when you first enable communication if property ReportConfigSaved is true, and reportsRestore has not already been called. The call restores the state of event reporting from the last session, and it initializes saving for the current session. Restoring overwrites the existing event report definitions. There is logic so that restoring only occurs once. It is useful to make this call if you want to force the restore action to occur before communication is enabled. For example, this could support viewing the event report configuration before communication is enabled. A connection type should be set and the variables and event types should be defined before calling this method. |
| void SecsEquip(String Name, String dmhGroup) | The constructor. The Name argument becomes the
name of
a global data item and a Tcl command in the SECS Server process.
It needs to be unique for each SecsEquip instance, and not coincide
with
a keyword in the Tcl programming language. The example
application
uses the Name value of eqsim. The name should be
a
single alphanumeric token.
The dmhGroup argument becomes the DMH message system group name used by the SecsEquip and SECS Server process. If you are instantiating more than one SecsEquip instance in your process, construct each instance using the same dmhGroup name argument so that the SECS Server process is shared. The groupname chosen needs to be unique among other DMH server instances on the computer where the SecsEquip is executing. The example application uses the name GEM which does not conflict with the default value for Hume Datahub instances which is mbx or the value GEMHOST used by the example Java Host application. The name should be a single alphanumeric token. The SECS Server process can be debugged remotely by connecting to the DMH mailbox SERVER_RPC@hostname:dmhGroup using the Inspect application or using the DMH mailbox SERVER_SQL@hostname:dmhGroup by the hubclient application. |
| void sendAbort(int stream, int primaryFunction) | This method is used to send an F0 abort message in lieu of a proper reply. It is used to indicate that the received message is not appropriate in the current context. For example, when the control state is ON-LINE LOCAL, the abort reply should be sent to a host remote command message that would affect processing. |
| void sendReply(int stream, int function, int
transactionID)
void sendReply(int stream, int function, int transactionID, String TSN_data) |
This method is used by your custom SECS message handling logic to send reply messages either with or without data. The reply data is formatted as Tcl Secs Notation text. |
| void sendS9(int function, String header) | This method is used to indicate an error condition response to a received message - it is sent instead of a normal reply. The SecsEquip software takes care of many of the possible error conditions automatically, including, 1- bad Device ID, 3 - bad stream, 5 - bad function, and 9 - T3 timeout. You will not receive a message type, unless you register for it. Therefore, you will mostly send the function value 7 to indicate improper data. |
| RcResult sendSecsMsg(int stream, int function,
boolean replyIsWanted,
String TsnData, boolean waitForReply)
public class RcResult {
|
These methods are used to send a primary SECS message,
optionally indicating
a reply is wanted, and optionally indicating that the call should wait
for a reply. A null or empty String value may be used for the TsnData
argument
when a header only message is to be sent. If a multiblock
enquire/grant
transaction is required for the message type, the SecsEquip software
does
it automatically. The reply value for the sendSecsMsg()
method
is a a two element data structure. The first element is an
integer
code, and the second element is reply or diagnostic data. The
possible
return values are:
-4 |
| static void SecsConn.serverSQLCmd(String sql) | Send an SQL command to the SECS Server process without waiting for a reply. This method is used by the SecsEquip software and made public in case of custom requirements. |
| static String SecsConn.serverSQLReply(String sql) | Send an SQL command to the SECS Server process and wait for the reply. This method is used by the SecsEquip software and made public in case of custom requirements. |
| static void SecsConn.serverTclCmd(String tclCommand); | Send a Tcl command to the SECS Server process without waiting for a reply. This method is used by the software and made public in case of custom requirements. After a SecsEquip instance has been constructed and the connection type set, the tclCmd( ) method should be used instead of this method for commands that are directed to a particular interface instance. Why? Doing so serializes the commands for a particular interface, and provides re-entrant execution protection. |
| static String SecsConn.serverTclReply(String tclCommand); | Send a Tcl command to the SECS Server process and wait for the reply message. This call is used by the SecsEquip software and made public in case of custom requirements. After a SecsEquip instance has been constructed and the connection type set, the tclReply( ) method should be used instead of this method for commands that are directed to a particular interface instance. |
| void spoolPurge () | This method discards any spooled messages that are queued for the host. |
| void spoolStop() | This method sets the messages types that are enabled for spooling to an empty string, thus, further spooling is stopped. |
| void spoolStreamFns() void spoolStreamFns(String StreamFns) |
The method is used to set the spooled message types. If called with no arguments, the streams that are allowed for the host to enable (property SpoolingAllow) are enabled. If called with an argument, the call bypasses the SpoolingAllow property and enables spooling for the S<s> and S<s>F<f> message types that are specified in the input string. |
| static EquipStartupData SecsEquip.startupLoad(String name) | This method retrieves the persisted startup configuration for the named interface. If no startup data is found, the returned data structure is populated with reasonable defaults, and the name field in the data structure is set to null to indicate that a saved record did not exist. The method uses the SECS server's ei_equipment data table. The table data is saved as the file ei_equipment.tab in the SECS server's working directory when the startupSave() method is called. |
| void startupRestore(EquipStartupData esd) | The method applies the passed startup configuration to the instance, configuring properties according to the data and calling connectTypeSet(). The method does not call commEnable() which allows you to fully configure the instance before going online. The name field in the input structure is ignored since the instance has already been constructed and given a name. |
| static RcResult SecsEquip.startupSave(EquipStartupData esd) throws Exception | This method assumes that startupLoad() was called
during initialization
so that the SECS server creates the ei_equipment table which is
used
to manage equipment startup data. The method creates or updates a
row in the table using the passed configuration, and then saves all of
the table data to the file system as the file ei_equipment.tab
in
the SECS server's working directory. An exception is thrown if
the
table data is not saved successfully. There is only partial
checking
of the validity of the passed data. The return value data
structure
is used to pass a possible warning message for the values controlling
tracing
and logging. In this case, the return code value is greater than
0.
This method is used by the StartupDialog class in the example application. |
| void tclCmd(String tcl) | This method is used to send Tcl code to the SECS server command mailbox for the connection. It is used by the SecsEquip software and made public to support custom requirements. |
| RcResult tclReply(String tcl)
public class RcResult { |
These methods are used to send Tcl code to the SECS server command mailbox for the connection and wait for the evaluation result. They are used by the SecsEquip software and made public to support custom requirements. The return value is an RcResult structure. The first element is a return code for the evaluation with 0 meaning success. The second element is the return value from the executed Tcl code, or an error message if the return code is not 0. |
| void terminalDisplayAck() | Calling this method posts the data collection event named TerminalServicesOperatorAck which is used by the equipment to indicate acknowledgment of a host Terminal Display. |
| void traceWin(boolean show); void traceWin(boolean show, boolean allowLogging) |
The SecsEquip is able to instantiate and manage a window class, Tracewin, which provides a controllable display of the data being exchanged across the SECS interface. The show argument is set to true to display the window, or false to close the window. There are menu options to provide hex dump formatting of the data, or higher level descriptive formatting. There are also menu actions to save the displayed data to the file system. The allowLogging argument controls whether there is a menu item which provides for configuring the continuous unattended saving of trace data to the file system. Since this feature has performance, disk usage, and security implications you may wish to restrict access to the configuration of logging. |
| String tsnI8Value(long int64) | Format a Tcl SECS Notation (TSN) I8 (signed 8 byte) integer
value using
hexadecimal notation. The body of this method is just return "0x" + Long.toHexString(int64); |
| void variableAdd(int varID, String varname, String
description,
String varClass, String valueTsn, String initialValue, String units) throws Exception |
Use this method to add a Status Value variable (varClass ==
"SV") or
a Data Value variable (varClass == "DVVAL"). Both classes of
variables
are available for the host to configure in event reports. A DVVAL
does not need to have a valid value, for example the alarm ID of the
latest
alarm when there have been no alarms. With the default checking
of
Id values, use varID values between 3000 and 9999. By default the
current
variable value is represented in the SECS Server's data table, and set
by your logic calling variableSet().
You
call variableMethodSet() to specify
that
your logic will manage the current value of the variable, and that the
SECS server should obtain the current value using an evaluation
callback.
If you have custom ID requirements, you can set the IdRangeChecked property false to disable varID range checking, and you can renumber existing Parameters and Variables using the variableRenumber method. |
| String variableGet(int varID) | This method is used to get the current value of a variable. It uses the same access logic that host requests use so it can test your custom value logic. The return value is null if there is an error. |
| VariableInfo variableGetInfo(int varID)
public class VariableInfo { |
This method returns the configuration information of a variable or Equipment Constant Variable (ECV). |
| int variableRenumber(String varname, int newVarId) throws Exception | This method is provided so that the ID values of the built-in
variables and parameters (ECVs) can be customized. All
of these data items are represented in the same table, and should be
given
unique numeric identifiers. Use the method after restoring or
configuring
the connection type, and before enabling communication. If the
newVarId
value is in use by a different variable, that variable is given a
"temporary"
varID value of the current value plus 1 million under the assumption
that
it will be renumbered as well. After initialization, if variables
are found with ID values greater than 1 million, they indicate that
more
than one variable has been assigned to the same ID value.
A positive return value is a warning, and the value 0 indicates success. In more detail, the return values and their meanings are:
|
| void variableSet(int varID, String newValue) | This method is used to update the value of a Status or Data Value variable whose current value is managed by the SECS Server in the ei_variable table. You are either calling this method whenever the value of a SECS variable changes, or you have called variableMethodSet to specify a callback interface for the SECS Server to use. |
| void variableMethodSet(int varID, VarValueRequestItf
callback)
public interface VarValueRequestItf { |
You use this method to register a callback that is executed
by the
SecsEquip software when the value of a Status Value or Data Value
variable
is needed. The callback is executed by a different thread than
your
main GUI thread, so be sure to use threadsafe programming techniques
such
as synchronized( ) statements. See the application example.
If the callback argument is null then any existing callback for the variable is unregistered and the method is updated so that the value is managed in the ei_varible table using variableSet(). |
The Hume Java SecsEquip software is licensed for development and runtime use at no additional charge for computers that are licensed for development use of the Hume Integration Datahub SDK.
Hume Integration is also pleased to offer separate runtime licenses for using the SecsEquip software on systems that are not licensed as development systems. Contact Hume Integration for more information.
Date of last revision: $Date: 2008/08/11 15:45:17 $