D2000 GateWay Client may also be configured also for direct transfer of values of selected objects from the source D2000 System (shows data through the D2000 GateWay Server) to the destination one without the need to configure objects of "Remote tag" type.
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- Processes
- Communication lines
- Stations
- I/O tags
- User variables
- Eval tags
- Structured variables
- Alarms
- Remote tags
- Historical values
The value transfer is executed only based on the basis of verification of object match between D2000 Systems. To transfer the values, select the particular objects or group of objects filtered by mask and then enter them into the the start parameters of the GateWay Client process.
The destination system tries to verify whether the required objects exist in the source system, and if so, it ensures transferring the value of these objects. If the source system does not contain a particular object, it will have an invalid value in the destination system.
If the list of objects is changed (any object is added or deleted) while running the GateWay Client in the destination system, which corresponds with the mask, the proper action is executed towards the source system (logging on/off of the object).
No values are transferred from the destination system to the source system. The value transfer is always unidirectional, so the transparent gateway works as a Data Diode.
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The GateWay Client process can be operated at the same time in the standard remote tags mode and as the transparent gateway.
Use of a transparent gateway
The historical mode of the gateway is a solution in cases when:
- changes Changes or modifications to the functional and deployed system are made, and these are first tested on a parallel system,.
- testing Testing of new HW is carried out during the planned upgrade of the existing system,.
- other Other testing or debugging purposes.
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| /ROVSELF.KOM+ | Ensures the value transfer of the SELF.KOM process, together with its children (lines, stations, I/O tags). |
| /ROVM.* | It is used for value transfer of the I/O tags whose name starts according to the ordinary naming 'M.'. |
| /ROVM.OBJ1,M.OBJ2 | Value transfer of objects M.OBJ1 and M.OBJ2. |
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If it is necessary to change object names (i.e., on the GateWay Client side, D2000 objects are named differently than on the GateWay Server side), it is possible to start the GateWay Client process with one or more /MON (Modify Object Names) parameters.
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Example: Deleting the string "MPPS." in the names of the opened objects we achieve is achieved by specifying specifying /MONMPPS\.,
Example: Replacement MPPS -> MES is achieved with the parameter /MONMPPS,MES
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A transparent gateway supports pairing not only by object names but also by UID objects. This feature is enabled by the start parameter /UID, which must be used when starting both the GateWay Client and GateWay Server processes.
This feature can be used to implement the functionality of a transparent gateway regardless of changes in the names of the objects (provided that they have the same UID), i.e., objects can be renamed.
Filtering of process alarms
When transferring the values to the destination system, the values of process alarms are usually filtered. To transfer values together with the process alarms, start GateWay Client with the /ROA parameter.
Invalidation of values of non-
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existent objects
If the transparent gateway does not find the desired object on the side of the gateway server, it invalidates the value of the object on the side of the gateway client. This feature can be disabled by the /NOINV start parameter.
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Using the D2000 Server parameter RouteArchiveMessages, it is also possible to achieve the transfer of changed values (in both normal and transparent mode):
- manually: editing/adding/deleting archived object values by the user in D2000 HI
- from a script with the INSERTARCHARR action
- from a script with the DELETEARCHDATA action
- from a script with the UPDATEARCHVAL action
Note: Only the values of archive objects that the GateWay Client process has open are transferred.
Diagnostic information
To activate the detailed debug information, start the GateWay Client with these parameters:
| /E+DBG.GTW_TR | Enables listing of the debug information about the objects for the operations of the transparent gateway. |
| /E+DBG.GTW_TR.VAL | Enables listing of the debug information about the transfer of values of selected objects to the destination system. |
| /E+DBG.GTW_TR.OLDVAL | Enables listing of the debug information about the transfer of old values of selected objects to the destination system. |
| /E+DBG.GTW_TR.DELETEARCHDATA | Enables listing of the debug information about the transfer of DELETEARCHDATA actions. |
| /E+DBG.GTW_TR.INSERTARCHARR | Enables listing of the debug information about the transfer of INSERTARCHARR actions. |
| /E+DBG.GTW_TR.UPDATEARCHVAL | Enables listing of the debug information about the transfer of UPDATEARCHVAL actions and values edited by a user. |
| /E+DBG.GTW.DELETEARCHDATA | Enables listing of the debug information about the transfer of DELETEARCHDATA actions (normal mode). |
| /E+DBG.GTW.INSERTARCHARR | Enables listing of the debug information about the transfer of INSERTARCHARR actions (normal mode) |
| /E+DBG.GTW.UPDATEARCHVAL | Enables listing of the debug information about the transfer of UPDATEARCHVAL actions and values edited by a user (normal mode) |
This listing of debug information can be also enabled /disabled also while running the the GateWay Client through the D2000 System Console.
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