The following steps with the PLC start-up switch S4 will cause a PLC GENERAL RESET:
1. Turn to position “2” (STOP operating state)
PS LED lights up.
2. Turn to position “3” (MRES operating state, request general reset) and hold
in this position (for approx. 3 second) until the PS STOP LED lights up again.
PS LED goes out and comes on again.
3. Within 3 second, turn to the
STOP-MRES-STOP (“2”–“3”–“2”) positions
PS LED PS first flashes at approx. 2 Hz and then lights up again
PF LED lights up
4. Once the PS and PF LEDs are lit, turn the switch S4 to position “0”
The PS and PF LEDs goes out and the PR LED (green) lights up
A general reset of the PLC is complete. It is now in cyclical mode.