Numerical input display

[plcdp 11]

Hello, I have a question regarding programming of a GOT 1665M series HMI. Not sure if this is the best place to ask this or I should post it in the HMI forum, but it's Mitsi so I figured I'd try here first. This might seem simple, but I can't make it happen for the life of me.... I have several down counters in a program that are displayed on the HMI as a numerical display. The counters are incremented down by the internal 1 sec clock pulse M8013 for a set period of time. Sometimes an additional clock pulse gets in there before the timer stops timing and the display shows -1 for a brief moment. Not a huge deal, just annoying. I've tried to go into the display case settings on the numerical display, set it to device value >= 0. Still displays the negative number. Is there any way to not allow a numerical display to show a negative number? Thanks, plcdp

[waynes 8]

Unless you have a negative offset, I would say its the PLC program that needs fixing. Instead of using LD < 0, try using LD = 0.

[Crossbow 295]

I agree. PLC program problem, not an HMI problem.

[JRoss 84]

Use an inline compare on the PLC to keep the counter from operating when the value is equal to zero. Then it won't count past 0.

[plcdp 11]

Thanks, thats the ticket. Have a good one! plcdp