Hai everyone,

as per attachment, i have anS7-400H, CPU 412-5 PN/DP and ET200M IM153-2 InterfaceRedund.Bundle. and connected as well usingPROFIBUS DP.

i have an doubt inSwitch over at failure,

Scenario 1: if one of the CPU fails, other one will take over the IM153-2 Interface, i.e known,

Scenario 2: now both the CPUs are working correctly and main CPU is executing the program. now one of the IM153-2 Interface fails, which CPU will be executing the program now.

could you guys tell/give answer to theScenario 2,or is there any Topic about theScenario 2case.

my prior thank you.

Hello,

Have you seen this manual: SIMATIC Fault-tolerant systems S7-400H (V6.0)

(See chapter 13.3)

Best regards,

Wizard