Siemens S7 400 UR2 rack

woven121

Member
W
Join Date
Oct 2014
Location
NC
Posts
1
How can I measure the backup battery voltage on the UR2 rack for a 400 controller? I have two batteries in the PS (new), no faults and yet I am sure that I dont have the 3.6v to the cpu to buffer my ram mem card; such that I lose program at power loss or cycle.
- I have replaced batteries w/new from siemens
- I have tried two different ram cards
 

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