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PL110-1A, triggering a Q-output when the AI.1 reached a certain value.

Posted: 28/03/2026, 20:59
by worldryder
I'm new with the PL110 and PLProg. So I am learning my way around both. I have not found any basic on-line tutorials for either. (Youtube and such) I am simply looking to turn on one or two Q-outputs based on the 0-20mA value feeding into AI.1.

0-4mA turn on Q1,
4-8mA tun off Q1 & turn on Q2,
8-12mA turn off Q2 & Turn on Q3,
finally at > 12mA turn off Q3 & turn on Q4 & Q5.

I'm simply not finding the mechanism to measure the AI.1 value in PLProg to turn on the Q-relay output.

Please help.
-WR

Re: PL110-1A, triggering a Q-output when the AI.1 reached a certain value.

Posted: 02/10/2026, 9:21
by grizzledbaby
You may want to start by checking how AI.1 is mapped in PLProg and what variable/register contains its scaled value. Once you can read that value, the Q outputs should be straightforward to control with comparison conditions for each current range.

The main thing is getting the AI.1 value into the logic first. If anyone has a simple PLProg example for this type of threshold control, that would probably be very helpful herestrands hint.