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  • Countdown Timer

    I downloaded the countdown timer on the example programs and it doesn't countdown it counts up. I did make it so that a user could enter a time for the timer but i cant figure out how to get the timer to not reset after the set time is finished. Does anyone have logic for a countdown timer that has minutes and seconds and then activates an output and stops when finished.
    Thanks
    Jason

  • #2
    Which PLC are you using?

    Comment


    • #3
      If you are using EP-MISC-004 in the P3000 column..
      Are you monitoring the correct tag. The timer and counter have their accumulator tags, and then there are separate COUNT/TIME down tags in MATH instructions.

      If you are using EP-MISC-029, I have not looked at it. Maybe I can later.

      [edit]
      EP-MISC-029 is questionable with respect to the project description on the webpage.
      I added a make-do project image

      Click image for larger version  Name:	remaining with time done memory.png Views:	0 Size:	14.3 KB ID:	125124
      Last edited by kewakl; 09-12-2019, 08:22 AM.

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      • #4
        I am using a productivity 1000. In the above program could i use another contact to turn the timer on after the value is entered.

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        • #5
          I used the above and it is working as a countdown timer. Is there a way to add a zero when the seconds and the minutes are in the single digits.

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          • #6
            Originally posted by Chefjay View Post
            I am using a productivity 1000. In the above program could i use another contact to turn the timer on after the value is entered.
            Are you referring to an hmi entry object?

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            • #7
              Originally posted by Chefjay View Post
              I used the above and it is working as a countdown timer. Is there a way to add a zero when the seconds and the minutes are in the single digits.
              On an hmi?

              silly forum. Cant reply to too many posts.
              120 seconds between posts.
              thanks for forcing me to waste time

              hmm maybe they just want to give me time to think about my posts

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              • #8
                Yes on the HMI numeric display.
                Thanks

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                • #9
                  Try in the Display Format area:
                  Total Digits: 2
                  Justify : Leading Zeros

                  In post #4, you asked about turning on a timer after the value is entered.

                  DO you mean after tech/operator makes a numeric change?
                  If so, and you are using an EA7 or EA9, then yes. Two options are possible.
                  1. Look at Notify/Handshake Cmore Help Topic CM087
                  2. Compare new and old. If NEQ, then handle your timer (in the snippet below, ValueChanged would handle your timer), and copy new back to old

                  Code:
                  .
                  .     new      old               | CPD
                  .---------]<>[-------------------+ 
                  .                                | new       old
                  .                                |   1       ValueChanged
                  .                                |
                  .                                +-------------------------
                  .
                  .     ValueChanged               
                  .---------] [-------------------- <handle the changed value as needed, then reset ValueChanged tag>
                  .
                  Last edited by kewakl; 10-11-2019, 06:16 AM.

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                  • #10
                    I just want a zero to display on the cmore when the minutes and seconds are a single digit. Right now it just displays the single digit without the zero.

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                    • #11
                      Do 'leading zeros' in cmore

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