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It is the second time I have the same problem with AO6X analog output modules - although in the Hardware Configuration I choose 4-20mA option for the current outputs, they produce 0-20mA anyway! Norlmally I use it with an inverters set to 4-20mA frequncy reference. OK, I switched inverters to 0-20mA, but there's another issue - 20mA does not correspond with the value of 4095 in an assigned MI, but with 4080! Very odd behaviour, not a real problem to me becuse I made it work anyway, but I had to report it here.

My best regards to all!




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Dear Nacho,

thanks a lot for the remark you've made, somehow I missed it while reading the Guide. :huh:

On the other hand, this means that the unit actually produces 0-20mA in both modes, so one has to use linearization network (or some similar calculation method) to scale 0-OUTmax in 819-4095 units instead of 0-4095. Logical question is then why there is a switch in a Hardware Configuration menu, i.e. what really changes when I change it? It seems - nothing.

Also, I don't expect output current to be dependent of the inverter input impedance as long as it is within specified range.

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