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Old October 10th, 2018, 09:12 AM   #11
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sparkie is offline
Join Date: Nov 2014
Location: KS
Posts: 915
Sorry about yesterday. It seems I put my left foot on the floor first when I got out of bed. So I'm going to give a bit more detail about what I'm trying to do.

I have a cooling-type temperature process. I set a lower end temperature, where the output shuts off and a higher end temperature, where the valve opens to keep the process in a range. The user determines this range. So I need to prevent the high setting from ever being less than the lower range + 1. I also need to prevent the low end setting from ever being lower than the process minimum. These writes cause errors on the controller.

I'm thinking that I need to do this with a macro, and I'm looking up how to do it. and macro syntax isn't bad, and I saw you can use a control object to run the macro when the screen in active, but I'm not quite sure how to go about that, as I've never used a macro on any HMI before.
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