Fuji Electric FRENIC-AQUA series, User Manual

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[ 1 ] Motors subject to motor operating time switching
After the number of motors remains unchanged for motor operating time switching time
(J436), switching operation will be implemented on the following motors.
Motor regular
switching time
(J436)
Description
OFF Motor regular switching operation is not implemented.
After the number of motors under operation remains unchanged for a period specified in the
motor regular switching time (J436), motor regular switching operation will be implemented.
The motor under operation with the maximum cumulative run time is stopped and then the
motor under suspension with the minimum cumulative run time is driven.
However, when the motor subject to stop has a shorter (or the same) cumulative run time than
the motor subject to operation, no switching will be implemented.
When there are two or more motors in which the maximum cumulative run time is the same
with the minimum cumulative run time, the motor with smaller motor number will be subject
to switching.
Pump control
mode selection
(J401)
Motor regular
switching mode selection
(J435)
Motor subject to switching during
operation
1: Fixed system - Commercial drive motor
1: Subject to commercial
power-driven pump
Commercial drive motor
2: Subject to inverter-driven
pump
Inverter drive motor
2: Floating system
3: Fl
commercial
power-driven motor
system
3: Subject to all pumps
Inverter drive motor
Commercial drive motor
1. Subject to commercial drive
pumps
Unit in highest-frequency
operation
2. Subject to inverter drive
pumps
PID-controlled unit
52: Communication
link inverter floating
method
3. Subject to all pumps
PID-controlled unit
Unit in highest-frequency
operation
0.1 to 720.0 h
54: Method in which
all communication
links simultaneously
controlled by PID
Regular motor switching not performed.
Test
Switching operation is implemented as in the case with motor regular time switching function
operation (J436 = 0.1 to 720.0 h) However, operating motor switching operation will be
implemented after the number of motors under operation remains unchanged for three
minutes. This setting is a function used for operation check upon start-up of the inverter.