Posted 9 Nov 2009 Hi, Can anyone explain the Limit control function of the PID[190] The PID works fine with the limit control turned off. My theory is that if I set the Limit control to 1 (C+6, bit 12) and set a value in C+8 then the PID will cointrol the output up to this value. But, it doesn't seem to have any effect on the MV. Thanks in advance Glenn Share this post Link to post Share on other sites
Posted 11 Nov 2009 An update. It seems that the PID will not accept a new Max Limit until the PID is switched off and then back on. Seems a lot harder than AB.. Share this post Link to post Share on other sites
Posted 12 Nov 2009 Horses for courses, every system has its quirks & issues. The longer you work with something, the more familiar you become. Share this post Link to post Share on other sites