Jen_Moderator

New question published by Tushar_Pendharkar_Fox is split to a separate thread with the subject Need terms for CPU 412-5H.

Best regards
Jen_Moderator

 batteries need for Redundancy time ,with out Batteries Redundancy is Possible are not  

my case:no battery in both PLC 

Download Hardware and Logic in Both PLC 

and Stop PLC A ,now PLC A is Standby and PLC B is master  Changer is ok 

But that time output is Disable  and Error also came IO address image not read something error is came  

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Split from Why batteries are used in S7 400(412-5H) ?.

Redundancy  Change ok but Change time output also Disable ,why this happen 

my case:

Closed cause question posted twice.

The second thread with the subject CPU 412-5 H PN/DP issue is published within the conference SIMATIC S7-400 / S7-400H / S7-400F /FH.