IEC61850 command-From HMI and Controller
I have a REF630 relay which is communicating through IEC61850 MMS communication to HMI and controller. HMI needs to send a command using the control model-Select before operate with enhanced security to increase the safety. But controller is running in automatic mode and intrested in sending command using the direct control model, But at a time only one control model is allowed in the relay for 1 CSWI? How to solve this problem?
I am pretty sure that you might be aware that any relay (read REF630) communicates with our HMI via MMS Protocol and with our Controller via GOOSE protcol. They both act separately. Now asfar as command from HMI is considered, I am again sure that the faceplate configured will have the option of giving a Selection cmmand and then the Operation command.
For e.g. for OPEN Command you first write the value "1" in CSWI1.Pos.ctlSelOff and then write "1" in CSWI1.Pos.ctlOperOff to finally give the Operation command. For Close Operation you first write the value "1" in CSWI1.Pos.ctlSelOn and then write "1" in CSWI1.Pos.ctlOperOn to finally give the Operation command. This is done via faceplate and it's a operator's action. It doesn't automatically occur.
The Operation command gien via controller is via GOOSE an it acts diffeently. Usually a open command given via Controller is a trip command. It is used for important functionalities like Load Shedding, ATS etc. It doesnot use CSWI Logical Node. Usually it usues PTRC or in some special cases GGIO. An it bypasses the Select before functionality of the relay.
In case you are using CSWI for the commands from the controller, then what you can do is go the application configuration of the Relay in PCM and use a separate variable to represent the Goose Command. You an use the signal matrix to map the signal i.e. command to your variable. Then you can create an OR in the block for the operation.
I hope it helps. Easiest will be to use PTRC or GGIO for giving commands from controller.