Sequence control of the monitors

Normally, when monitoring conditions are fulfilled, the Pulse Test and Zero Test are alternately performed approximately every 250 working cycles. This procedure is halted the moment any one of the 2 monitors results in a fault assumption or clearing of a fault path. The monitor that generated the fault assumption (or that resulted in the clearing of a fault path) will henceforth be performed alone after every 60 working cycles till that fault (or the cleared fault path) is confirmed.

The parity check is performed continuously.