Commercial power supply/inverter switching, Standard connection diagram – Toshiba VF-AS1 User Manual
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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
*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.
MC1
*2
For motor protection
THR
*4
Motor
FL
G / E
F
RES
CC
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
FLC
FLB
FLA
Run
command
S1
ST
R
S2
S3
OUT2
P24/PLC
OUT1
RY2
PO
PB
PC/-
PA/+
Main circuit
Stand-by
*7
Reset
*6
Emergency
stop
*5
CCA RX VI/II RR/S4 PP
AM
FM
OUT1
MCCB
Common
I M
RY1
Protective action
detection
relay
MC3
*2
MC2
*3
+SU
Control
circuit
Control power supply
backup option
*1
NO
CC
Commercial run
switching signal
*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)
= 0
f115 (Input terminal function selection: S1) = 6