Siemens PLC Graph function not timing

Anthony.D

Member
Join Date
May 2022
Location
Michigan
Posts
1
the plant I am supporting uses a siemens graph function to do some of the step procedures. in several steps it waits for the step to execute for a say 200ms before it will advance. But at times I have found that while waiting at the step the time associated with that step does not advance(stays at whatever its last value was. I fixed it with external timers but has anyone seen this before?
 

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