2. Commercial Power Supply/Inverter Switching
The motor runs on commercial power supply under rated operating conditions and when the motor
runs in energy saving mode with its input power frequency lowered, this circuit switches the motor
to the inverter power without stopping the motor.
2.1. Standard connection diagram
MCCB
Control power supply
backup option
*1: The control power supply backup option (Model: CPS002Z) is needed.
*2: Observe the Item 1 in 2.2, "Precautions."
*3: See Item 2 in 2.2, "Precautions."
*4: Be careful about Items 3 in 2.2, "Precautions."
*5: Be careful about Items 5 and 7 in 2.2, "Precautions."
*6: Be careful about Item 6 in 2.2, "Precautions.
PO
PA/+
*3
MC2
R/L1
S/L2
T/L3
*1
+SU
FLA
FLB
FLC
P24/PLC
RY1
OUT1
OUT2
RY2
NO
CC
OUT1
FM
AM
*2
MC1
PC/-
PB
U/T1
V/T2
Main circuit
W/T3
F
R
ST
RES
S1
Control
circuit
S2
FL
Protective action
S3
detection relay
CC
G / E
CCA RX VI/II RR/S4 PP
*7: VF-AS1's 'WP1/WN1' model and VF-PS1 don't have 'ST'
terminal. Please set next parameter for use 'S3' terminal as
'ST' function.
f110 (Always ON function selection 1)
f115 (Input terminal function selection: S1) = 6
7
E 6 5 8 1 3 6 4
For motor protection
*4
THR
*2
MC3
Run
command
*7
Stand-by
*6
Reset
Emergency
*5
stop
Commercial run
switching signal
Common
Motor
I M
= 0