Iec 61850 Protocol; Read-Only Settings; Read-Only Ddb Signals - GE MiCOM P747 Agile Technical Manual

Chapter 7 - SCADA Communications
• Read records (event, fault, disturbance)
• Time Synchronisation
• Change active setting group
11.3

IEC 61850 PROTOCOL

If Read-Only Mode is enabled for the Ethernet interfacing with IEC 61850, the following commands are
blocked at the interface:
● All controls, including:
▪ Enable/disable protection
▪ Operate Control Inputs
▪ CB operations (Close/Trip, Lock)
▪ Reset LEDs
The following commands are still allowed:
● Read statuses, measurands
● Generate reports
● Extract disturbance records
● Time synchronisation
● Change active setting group
11.4

READ-ONLY SETTINGS

The following settings are available for enabling or disabling Read Only Mode.
● RP1 Read Only
● RP2 Read Only
● NIC Read Only (where Ethernet is available)
These settings are not available for MODBUS and DNP3.
11.5

READ-ONLY DDB SIGNALS

The remote read only mode is also available in the PSL using three dedicated DDB signals:
● RP1 Read Only
● RP2 Read Only
● NIC Read Only (where Ethernet is available)
Using the PSL, these signals can be activated by opto-inputs, Control Inputs and function keys if required.
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MiCOM P747
P747-TM-EN-1
P747-TM-EN-1.1