Codesys and EasyIO FC20 reading wrong value.

Hello

I want to get resistor values from 4 analog inputs (UI2,UI3, UI4,UI5) on my EasyIoFC-20 IO module.
When I Connect to only UI 2 input. Values on UI2 and UI3 change in codesys. The same thing happens when I connect to UI4. The value affects UI5.

The values are supposed to be zero when nothing is connected, but they show other values.

Does anybody know what the problem could be?
 
The values are supposed to be zero when nothing is connected, but they show other values.
Why would an analog input be 0 if you've left it floating? An analog input will sense any voltage, whether it's directly connected or induced by a nearby signal. You should connect unused analog inputs to ground if you want them to stay at 0V.
 
Just provide more datas on you are attempting to achieve with schematic at least of the installation..
Then try to give us network configuration...
Then we can support you..
 
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