FX3GE-24M Analog Input

[BoVice 0]

Hello all,

I'm using the built in analog inputs on the FX3GE-24M, and a fluke 773 milliamp Process meter to "simulate" input signal. I currently only have the meter connected to channel 2. I am getting readings on chanel 1 while not even having anything connected to it. the readings will also change in value as i increase or decrease the signal, so somehow it is seeing a signal. when there is no meter atatched to either, channel 1 will still jump around in value. this is a brand new PLC. could channel 1 be damaged? ive attatched a picture of monitored reading

[JRoss 84]

That's because you're using a 32-bit instruction on a 16-bit register. Change the instruction from DMOV to MOV.

[BoVice 0]

Bless you good sir! 

not sure how i didnt pick up on that. im all flustered from using new stuff. making silly mistakes

[JRoss 84]

No problem. That's a common mistake in the Mitsubishi world, particularly with new users. Especially watch out for multiplication and division (16 and 32-bit), that one still gets me if I'm not careful.