Vidmas30 Posted May 6, 2012 Report Share Posted May 6, 2012 Good day, We got heating unit where v570 controls the condensate boiler (temperature PID loop). First issue was, that when we started to tune the unit, heating system was closed, left working only hot water boilers, so it's small contour. Because of that, PLC couldn't finish PID autotune process, because system heats up quickly and temperature after second wave, stays above setpoint very long time.. So we tuned it manually. The question is: beacause of the same reason (fast heating up) PID block status shows integral wind-down message (when there's no hot water usage). What should we do about it? Is there a chance that because this wind down the integral error will accumulate and PID block stops working? Should we use force integral error block to reset this error? if so, when it would be best to do this? Or maybe someone could share better solution? Thank you! Quote Link to comment Share on other sites More sharing options...
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