PLC State Management
(Original Document)
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IEC61850 Server
When the PLC stops, the quality of each data object is set as Invalid. In this case, the 140 NOP 850 00 module continues to detect events, but rejects client requests with the Add Cause detected error code of 1 (not-supported) for DOns or SBOns objects.
IEC61850 Client
When the PLC stops or starts, the 140 NOP 850 00 module updates data to the CPU and continues to send control commands to the remote IED, when triggered.
IEC61850 Roles and Functions
Depending on the state of the PLC, the following polling functions are supported:
IEC61850
Role/Function
PLC State
Run
Stop
Server:
  • Buffered and unbuffered reporting
X
X
  • GOOSE
X
X
  • Control commands
X
–
Client:
  • Buffered and unbuffered reporting
X
X
  • GOOSE
X
X
  • Control commands
X
X
X: Supported
–: Not supported