Evaluating The Passivation Status - Siemens SIMATIC PCS 7 CPU 410-5H System Manual

I/O configuration variants
4.7 Connecting redundant I/O to the PROFIBUS DP interface
4.7.2

Evaluating the passivation status

Procedure
First, determine the passivation status by evaluating the status byte in the status/control
word "FB_RED_IN.STATUS_CONTROL_W". If you see that one or more modules have
been passivated, determine the status of the respective module pairs in
MODUL_STATUS_WORD.
Evaluating the passivation status using the status byte
The status word "FB_RED_IN.STATUS_CONTROL_W" is located in the instance DB of FB
450 "RED_IN". The status byte returns information on the status of the redundant I/Os. The
assignment of the status byte is described in the online help for the respective block library.
Evaluating the passivation status of individual module pairs by means of MODUL_STATUS_WORD
MODUL_STATUS_WORD is an output parameter of FB 453 and can be interconnected
accordingly. It returns information on the status of individual module pairs.
The assignment of the MODUL_STATUS_WORD status byte is described in the online help
for the respective function block library.
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CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB