4-302
The following examples are for the actions of increasing / decreasing pumps in the cycle modes of inverter
pump. Relay 1~Relay 4 in 1 to 8 pump card is set to be enabled. Refer to Fig.4.4.119 for switching of the
motor connected to the inverter or AC power supply. MC of AC power supply is mainly controlled by the
external circuit control. Refer to Fig.4.4.127.
When 24-00=1, 24-06=0 and depending on the above PID setting, the following status occurs.
Output frequency (Fout) reaches the upper limit frequency (00-12) and Fout time is over than the
duration of upper limit frequency (24-03). Then Relay 1 is power off and output frequency of the
inverter does not occur.
Relay 1 and Relay 2 is power on and the inverter starts to accelerate after the switching time of MC
(24-05) ends.
Fout
Motor 1
Motor 2
Start
Relay 1
Relay 2
Motor 1 Inverter
Relay 3
Relay 4
Motor 1 AC Power Supply
Motor 2 Inverter
Motor 1 Frequency
Motor 2 Frequency
Inverter
AC Power
Supply
Inverter
T1
T2
Figure 4.4.122 Diagram of increasing pump in the cycle modes of inverter pump
T1 = 24-03 Duration of Upper Limit Frequency
T2 = 24-05 Switching Time of Magnetic
Contactor (MC)
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