FM 355C and Software Redundancy for S7


Thread Starter

Hosein Zomorodi

Hi List,

I'm involved in PLC configuration for a chemical plant having process slow rate changes, which guide me to select "software redundancy" for PLC configuration. Meanwhile our process have 31 closed loop control also and I wanted to select PID module (FM 355C) for this purpose, but this module is not mentioned in the "suitable modules for ET200M distributed I/O" in the related Manual from Siemens (download from siemens web-site with name: SWR_e), so I'm confused whether this module can be used or not (using AI and AO module instead).