[main] ERROR IEC61850_7_420 DERPowerManagementLN::DPMC : [constraint 'Mmulti' for inexisting 'EcpRef'][constraint 'Omulti' for inexisting 'CeaEngzCtl','CeaEngzCtlSt']
Proposal
Believed related to attribute renaming
EcpRef with OutDepRef
CeaEngzCtl,CeaEngzCtlSt with CeaEgzCtl
DPMC allows multiple setpoint DOs
To be discussed
EITHER delete erroneous constraints in UML model
OR
revise model so that DPMC can be used with multiple ECP and/or
multiple Cease to energize controls
Discussion
Created
Status
14-Nov-2025 Its not clear why CeaEgzCtl should be multi.
Leave this as a single optional control
Correct the constraints in the UML
14 Nov 25
Drafting Implementation
Accepted for discussion
04 Nov 25
Discussion (red)
Discussed in WG17 meeting 4th March 2025
04 Nov 25
Accepted
Discussed 24-Mar-2024
DPMC can handle multiple units => most data objects should be multiple.
2 main use cases:
a. 1 DPMC has one set of data-objects - the DMPC aggregates or distributes setpoints as relevant
b. 1 DPMC has multiple data objects - the DMPC is a container for the data points from each of the DER units
Conclusion: in short term - change constraints to match latest data object names.
It would be good to have some examples in part 7-520.
24 Mar 25
Triage
Correction: EcpRef has been replaced by OutEcpRef
Proposal - delete erroneous constraints in UML model
Keep the model as per the published document.