A restart should clear most problems that may occur. If, however, the diagnostic self-check detects the same
pr
oblem that caused the IED to restart, it is clear that the restart has not cleared the problem, and the device takes
itself permanently out of service. This is indicated by the ‘’health-state’ LED on the front of the device, which
switches OFF, and the watchdog contact which switches ON.
P64x Chapter 4 - Software Design
P64x-TM-EN-1.3 69
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