Appendix II
78
A
p
p
en
d
ix
II
(6)About PID control adjustment, proportional gain E2.13, integral time E2.14, can be
adjusted on the basis of factory value, please adjust according to the time situation.
(7)Parameters
Parameter code
Description
d0.40
Feedback pressure detection value
F0.11
Command Source Selection
F2.01~F2.08
Selection of Output Function of Control Board Terminal Relay
F7.46~F7.49
Wake-up and sleep Frequency Settings. Use it together with E8.19~E8.23
E8 group
Constant Pressure Water Supply parameters
E2.02
Water pressure feedback channel,0:AI1 feedback 1:AI2 feedback
E2.06
PID deviation limit
E2.13
PID proportional gain
E2.14
PID itegration
(8) Explanation of one inverter drives 4 pumps
Pump instructions:
Inverter A pump begins running, the frequency is bigger than F0.21; and feedback pressure is
less than the set pressure (E8.07), and lasts until the delay time set by E8.08, when the pump
condition is satisfied, the pump is added. The system is switched according to the sequence
principle of frequency conversion A pump and frequency conversion pump plus one:
A Pump running normally→add pump when pressure is insufficient→Frequency conversion
shutdown operation of pump A→Delay time after frequency inverter frequency switch to power
frequency(E8.09)→A pump
running
at power frequency→frequency inverter frequency (E8.10)
→B pump frequency inverter running→add pump when pressure is insufficient→Frequency
conversion shutdown operation of pump B→Delay time after frequency inverter frequency switch
to power frequency(E8.09)→B pump running at power frequency→frequency inverter frequency
(E8.10) →C pump running at power frequency→add pump when pressure is insufficient →
Frequency conversion shutdown operation of pump C→Delay time after frequency inverter
frequency switch to power frequency(E8.09)→C pump rnning at power frequency→frequency
inverter frequency(E8.10)→D pump frequency inverter running.
Pump reduction instructions:
If the A, B and C pumps are power frequency, the D pump is frequency inverter.
When the frequency inverter pump runs to E8.13 pump reduction frequency and the feedback
pressure E8.12, after continuing the delay time of E8.14 pump reduction, the pump reduction is
started. The system starts in sequence, starts first according to the normal principle, stops first,
stops the power frequency A pump ,power frequency B ,pump power frequency C pump.
Summary of Contents for PI500-W 004G1
Page 4: ......
