PLC ladder countdown timer programing help

Thread Starter

Sorin Petrescu

Joined May 11, 2019
4
Hello everyone
I'm trying to make a countdown timer (minutes and seconds) in ladder language (no structured program), try this on GX Development Mitsubishi. Can someone help me ?
 

MaxHeadRoom

Joined Jul 18, 2013
19,006
A little vague as to what you are trying to do, an event to occur after so many minutes?
Does it matter count up or count down?
Max.
 

panic mode

Joined Oct 10, 2011
1,782
If just needed an interval, it is simplest to calculate timer preset from required values for minutes and seconds.
But if the goal is to display countdown values for minutes and second on some HMI, either more math is needed or something like thisMS_Timer.png
 

Thread Starter

Sorin Petrescu

Joined May 11, 2019
4
If just needed an interval, it is simplest to calculate timer preset from required values for minutes and seconds.
But if the goal is to display countdown values for minutes and second on some HMI, either more math is needed or something like thisView attachment 177179
Yes you have right, i must put on the some LCD display.
I did one similar , but with DEC not with SUB.
After ai finish , i wil post to tell me your opinion
Thank you very much
 

ericgibbs

Joined Jan 29, 2010
8,722
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