The hold up time represents the time that device outputs are maintained in their current states after a communication disruption and before taking their fallback values. Because distributed devices are not connected to the primary CPU during a switch-over, set the hold up time to a value greater than the expected duration of the communication interruption.

For EtherNet/IP devices: Set the hold up time to exceed: 4.4 x (MAST period) + 5000 ms.

Released for: Schneider Electric India