Posted 24 Jul 2015 Hi friends, Recently, i've replaced interface module ET 200iSP IM 152-1 on my s7-400 system. Original module: Hardware version 7, Firmware version V2.0.7 Replacement module: Hardware version 9, Firmware version V2.0.6 If this newly installed interface module can be synchronized with the system and is there any potential communication failure with CPU S7-400? Thanks for looking in and best wishes for your success, Regards, Harianta Share this post Link to post Share on other sites