Posted 18 Jun 2019 Hi, I have encoder and count pulses in mode "Differential Phase Input" - Linear mode Every one turn I have Z-phase reset and counter starts from 0 I set some target value comparison table from D1000 for @CTBL #0000 #0000 D1000 and it works just one to reach target value After PLC start and HSC reach target value for Interrupt 01 I get subroutine working, but even I reset HSC using Z-phase signal and PV goes to 0 still interrupt is activated. I would like to start and stop interrupt during one turn of encoder and make it every one turn Thanks for clue Share this post Link to post Share on other sites
Posted 18 Jun 2019 http://www.plctalk.net/qanda/showthread.php?t=62245 http://www.plctalk.net/qanda/showthread.php?t=32652 The above threads may help you out. Regards, Garry Share this post Link to post Share on other sites
Posted 18 Jun 2019 (edited) linked threads are just for beginner. This is clear for me. I tested some solution and it more less works. Now I have A531.00 set to ON and hardware signal Z-phase reset encoder I checked that if I want to start counting pulses to target value for CTBL and get another interrupt output ON I have to initiate CTBL once again after encoder reset The problem is timing. I set new CTBL declaration when Z-phase signal (0.04) goes off - but I make it from ladder and cycle is 7.3ms. How I have to implement this to avoid delay from cycle time thanks in advance I tried to set CTBL in subroutine (interrupt task 141) from Interrupt in direct mode ( CIO 0.05). My idea was to connect Z-phase to CIO0.04 ( encoder reset) and CIO0.05 - CTBL registration), but in such a configuration CTBL doesn't work Edited 18 Jun 2019 by pszczepan Share this post Link to post Share on other sites
