KRC1 Fault to PLC ($ERROR_TO_PLC)

I am using KRC1 and i have used a system variable Fault to PLC ($ERROR_TO_PLC),this variable should be true in case of robot error.
but not this meaning.for example in case robot emergency this variable will change to TRUE.for example in case robot moving when the signla $MOVE_ENABLE is false from PLC ,this variable $ERROR_TO_PLC will change to TRUE.

how we can mange the robot faults to this variable ?

Please Read Document.

This signal is system output signal and will be set to ture in case of robot fault.

please read my first question!