The sequence cannot be restarted from the turned-off step.
When the output is turned off via the external contact during sequence operation, the parameter set at the turned-off step remains. If the external contact is turned on, the parameter on the turned-off step will output, but the sequence cannot be restarted from that point.
To restart the sequence, set both AC and DC to 0 V and 0 A. Then, turn the output on via the external contact, and start the sequence from the beginning.