Hi everybody,
I inherited a redundant 1756-L71 ControlLogix system with 2 racks with some DI, DO, and AI redundant modules (1715 series). The racks are of course connected through 1715-AENTR adapters.
Now disclaimer, I'm not an expert in these kind of systems.
The question I wanted to ask you guys, as even the technical support couldn't help me is the following:
on the HMI and even by going online with RSLogix5000 and monitoring the tag values I constantly see ALL the analog readings "flickering" between 0.00 and the correct value.
By flickering I mean that for one second (for example) I read 0.00, after that for one second I read the expected value, then agaiun 0.00 and so on...
What can possibly cause this problem ?
FYI:
- the modules are 1715-IF16
- we're using the 1715-TADIF16 termination assemblies
- the modules are set in 'redundant mode' but not in 'SIL2 mode'
- the incoming current is correct (checked through a multimeter and also simulated through a current generator just on the termination assembly pins)
Thank you for your support
I inherited a redundant 1756-L71 ControlLogix system with 2 racks with some DI, DO, and AI redundant modules (1715 series). The racks are of course connected through 1715-AENTR adapters.
Now disclaimer, I'm not an expert in these kind of systems.
The question I wanted to ask you guys, as even the technical support couldn't help me is the following:
on the HMI and even by going online with RSLogix5000 and monitoring the tag values I constantly see ALL the analog readings "flickering" between 0.00 and the correct value.
By flickering I mean that for one second (for example) I read 0.00, after that for one second I read the expected value, then agaiun 0.00 and so on...
What can possibly cause this problem ?
FYI:
- the modules are 1715-IF16
- we're using the 1715-TADIF16 termination assemblies
- the modules are set in 'redundant mode' but not in 'SIL2 mode'
- the incoming current is correct (checked through a multimeter and also simulated through a current generator just on the termination assembly pins)
Thank you for your support