Xylem 19 001 300 R2 Silent Storm VFD Pumping System OMRON Touch Screen Display Manual - Manual (Page 44)

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40 Omron Touch-Screen Display
Tuning can also be accomplished by tuning the individual low- and high-flow coefficients. This is
especially true if the station performance is significantly different at low and high flows
· N7:161 is the Low-Flow Proportional Coefficient. The default value is 40.
· N7:162 is the Low-Flow Integral Coefficient. The default value is 80. If the station is overshooting
the setpoint on initial ramp up, the responsiveness of the PID loop can be slowed down by
decreasing the value in N7:161, and increasing the value in N7:162. If the station is slow in
reaching the setpoint on initial ramp up, the responsiveness of the PID loop can be sped up by
increasing the value in N7:161, and decreasing the value in N7:162.
· N7:163 is the High-Flow Proportional Coefficient.
· N7:164 is the High-Flow Integral Coefficient.
· N7:165 is the Minimum VFD Speed when ramp-up is complete.
· Tap the value field next to any of these registers and the calculator/keypad pops-over the screen.
Enter or edit the value. (See also, Calculator/Keypad .)
· Optionally, press the Main Menu touch key to return to the Main Menu. (See also, Main Menu .)
· Optionally, press Back to return to the Register Access screen.
· Press the down arrow (▼) in the bottom right corner of the screen to display the PID
Tuning screen page 3.
· N7:192 is the VFD Speed in counts when lag pump starts.
· N7:193 is the VFD Speed in counts when lag pump stops.
· N7:155 is the Maximum Inverter Speed in counts during Speed Test.
· N7:55 is the Ramp-up Rate in seconds during system pressure-up.
· N7:156 is the Delay time in seconds until Speed Test begins.