muhammadomar.khan
Member
Dear Guys I need help regarding PLC.
I am stuck for some days now and problem is strange. Machine PLC has two encoder modules when machine is powered inputs on Encoder module 1 starts flickering with 2-3 volt presence and in ladder logic one can see degrees malfunction as status of bits are continuously changing and this behavior also effects second module as in ladder logic its bits starts to fluctuate.
I have changed encoder module, power supply, cpu but still same behavior.
Some times problem get fixed and there is no flickering for some time lets say 30 minutes and than again it starts.
When this problem appears 24 V drops to 22 V and when ever this problem disappears it again comes back to 24V
I am stuck for some days now and problem is strange. Machine PLC has two encoder modules when machine is powered inputs on Encoder module 1 starts flickering with 2-3 volt presence and in ladder logic one can see degrees malfunction as status of bits are continuously changing and this behavior also effects second module as in ladder logic its bits starts to fluctuate.
I have changed encoder module, power supply, cpu but still same behavior.
Some times problem get fixed and there is no flickering for some time lets say 30 minutes and than again it starts.
When this problem appears 24 V drops to 22 V and when ever this problem disappears it again comes back to 24V