Good morning,

I'm having a little trouble (havent used this function before!) with a voltage analogue input I2(IA3). On the simulation tool its all seems to work fine, but on the rig it doesnt seem to work.

The voltage input is 0-5 volts maximum, with the idea that as the voltage drops (taken from a temperatrue sensor) the PLC with trigger an output when the voltage drops below, say 1.5 volts.
I have measured the voltage as being 4.3 volts at the input, but this is shown as '0' during the online test.

i've attached the specific part of the program. Please could somebody take a little look and possibly opoint out where i might be going wrong,
any help appriciated,

Best regards,

Ben.