Xylem 19 001 300 R2 Silent Storm VFD Pumping System OMRON Touch Screen Display Manual User Manual
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How Do I?
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· Press the N7:xxx PID Tuning touch key on the Register Access screen to open the first of two PID
tuning screen.
· N7:160 is the PID threshold for high-flow coefficients. This is the VFD speed (in counts) when the
PLC switches from the low-flow coefficients to the high-flow coefficients, since some pump
stations perform differently at different flows. The default value is normally 31495. .
· N7:175 is the PID responsiveness value for one register tuning. The default value is 520.
Decreasing the value of this register slows down the responsiveness of the PID loop. Normally,
this should be done if the station is overshooting the setpoint on initial ramp up. Increasing the
value of this register speeds up the responsiveness of the PID loop. This value should also be
changed if the station is taking too long to get to the setpoint. Changes should be made in
increments of no more than 200 with a minimum and maximum values range of 200 and 1100.