Posted 13 Feb 2017 Hello to allIve seen this line on a machine programm (see on attached file) but I don't understand what it means Can someone tell me?I was troubleshooting the system, the couting number on IHM suddenly show many "diez symbol", meaning that counter has reached the max value while it's not.Any help would be greatly appreciatedMy best regards LADDER SNAPSHOT.pdf Share this post Link to post Share on other sites
Posted 15 Feb 2017 That is grafcet. This code you showed is a transition between two steps in grafcet. I %i7.0 is true then the grafcet will move from step 3 (%x3) to step 4 (%x4) What increments or decrements your counter? Share this post Link to post Share on other sites
Posted 15 Feb 2017 Hello sir thank you for your reply ok i understand now; iam not familiar with grafcet; that's why i did not know what this means In the programm line concerning the Counter; it's written: IF %IW7.0.4 "GREATER OR EQUAL THAN" %MW1840 THEN INC%MD4454 Looking on variables windows; i notice that : MW1840 is the pieces Counter,; IW7.0.4 = Counter pv value;; %MD4454 = Tag adress on the IHM On the machine, i don't see a sensor for bottle counting, then i don't know what increment or decrement the counter Hope to read you soon My best regards Share this post Link to post Share on other sites
Posted 20 Feb 2017 You are going to have to find in the program where they write to %mw1840. Should be an input triggering a increment on the word. Then trace the wiring from that digital input to the field. That is all i can suggest at the moment Share this post Link to post Share on other sites
Posted 23 Feb 2017 Hello sir I've already done what you said there's long tile ago, the alone area in the programm where i find %MMW1840 is the line showed previously Anyway; thank you for your reply My best regards Share this post Link to post Share on other sites
Posted 28 Feb 2017 I suggest, trace and make sure the wiring from field to the digital input of PLC was correctly, same with cHud suggested, and try to make additional small capacitor (less then 10 µF), make it parallel connection, please see the picture as attached. If you need more fast counting, please replace the capacitor to small capacitor (1 µF, 820 pF, etc) If with out capacitor, the counter can not make one by one counting perfectly (some times 27, 59, 17, etc) even though the contact give one pulse only at a time. That is my suggest. Share this post Link to post Share on other sites
Posted 2 Mar 2017 Hello sir Thank you for your reply Let me see that again, and I'll be back to you Thank you very much Share this post Link to post Share on other sites