AC500 - analog modules ac523
I have a problem with an module, specifically with an AI523.
The values are non 'stable': if i turn off and restart the plc (PM590), some channels have value '32700...'. If i exctract and recconnect the module or restart the plc, the values become 'normal', trusted.
That appens often.
Thanks for the tips.
As you describe it, it looks like a typical fake contact or bad shielding of the analog signal cable.
You can try to test all your HW connections in your application, especially if subject to vibration.
You can also check with an oscilloscope if the signal in input at the PLC is clean or "dirty" by disturbances, so as to accurately determine the source of signal variations.
If necessary, you can filter the SW signal input at input level when configuring the analog input card
Let us know about the results