sultanahmed
Member
Hi Every one,
I am working on S7-300 PLC and CPU is 315 2 DP 315-2af03-0ab0/ v1.2.
Total number of racks 3 (1 CPU with IM360 and others are IM361 used).
I am getting error OB81 and baf backup voltage failure on central rack
when i dig the error which says
The 24-V voltage supply
A battery
The complete backup
I refer to CPU Input Power 24V which is ok check with multimeter, i check battery which is 3.3v .
CPU suddenly comes on SF and after some time, sf removes automatically.
when CPU goes on SF dim red light blinks on IM360 module,i replace IM360 module but still same problem, i replace plane connector of CPU same problem.
Some times it shows batt fault but some times dont.
this fault occurs frequently in a day.
I am confused what will be problem?
Please Advise
I am working on S7-300 PLC and CPU is 315 2 DP 315-2af03-0ab0/ v1.2.
Total number of racks 3 (1 CPU with IM360 and others are IM361 used).
I am getting error OB81 and baf backup voltage failure on central rack
when i dig the error which says
The 24-V voltage supply
A battery
The complete backup
I refer to CPU Input Power 24V which is ok check with multimeter, i check battery which is 3.3v .
CPU suddenly comes on SF and after some time, sf removes automatically.
when CPU goes on SF dim red light blinks on IM360 module,i replace IM360 module but still same problem, i replace plane connector of CPU same problem.
Some times it shows batt fault but some times dont.
this fault occurs frequently in a day.
I am confused what will be problem?
Please Advise