Virtual Input/Outputs; Self Monitoring; Protection Healthy/Defective - Siemens Solkor 7PG2113 Technical Manual

7PG2113/4/5/6 Solkor Description of Operation

2.10 Virtual Input/Outputs

The relays have 8 virtual input/outputs, these are internal logic states. Virtual I/O is assigned in the same way as
physical Binary Inputs and Binary Outputs. Virtual I/O is mapped from within the INPUT CONFIG > INPUT
MATRIX and OUTPUT CONFIG > OUTPUT MATRIX menus.
The status of the virtual inputs and outputs is volatile i.e. not stored during power loss.

2.11 Self Monitoring

The relay incorporates a number of self-monitoring features. Each of these features can initiate a controlled reset
recovery sequence.
Supervision includes a power supply watchdog, code execution watchdog, memory checks by checksum and
processor/ADC health checks. When all checks indicate the relay is operating correctly the 'Protection Healthy'
LED is illuminated.
If an internal failure is detected, a message will be displayed. The relay will reset in an attempt to rectify the
failure. This will result in de-energisation of any binary output mapped to 'protection healthy' and flashing of the
protection healthy LED. If a successful reset is achieved by the relay the LED and output contact will revert back
to normal operational mode, and the relay will restart.

2.11.1 Protection Healthy/Defective

When the relay has an auxiliary DC supply and it has successfully passed its self-checking procedure then the
front facia Protection Healthy LED is turned on.
A changeover or open contact can be mapped via the binary output matrix to provide an external protection
healthy signal.
A changeover or closed contact can be mapped via the binary output matrix to provide an external protection
defective signal. With the 'Protection Healthy' this contact is open. When the auxiliary DC supply is not applied to
the relay or a problem is detected within the relay then this output contact closes to provide external indication.
If the relay is withdrawn from the case, the case shorting contact will make across the normally closed contacts to
provide and external alarm.
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