Bad point on FP analog out module

[Shock]

When moving through the 4-20 mA range on an FP analog out module by .1 mA increments. I am seeing several specific points ex. 5.2 mA or 11.3 mA. That appear to short the module to 20 mA. I have confirmed this both with FP explorer and a DVM. The points are reproduceably bad. In addition the only way I have succeded in solving this is by switching the CFP 20-20 head module. The problem is that I have many systems to field and I have now seen this on 3 seperate heads. I have even tried different power supplies. any feedback would be great.

[Ames]

Shock,

So you have seen this issue on multiple systems and when you replace the cFP-2020 controller the issue goes away? When you say it shorts the module to 20mA, do you mean you tell it to output 5.2mA and it then actually outputs 20mA? I would have guessed that this issue has to do with the I/O module. Does reformatting a problematic controller resolve the issue or does it still demonstrate the behavior? Also which specific cFP I/O module are you seeing this behavior from?

Ames