Hitachi SJ Series User Manual page 372

Chapter 12
Example of Energy Saving on the Primary Side
Contactor
(AF120 = 01: Enabled (Primary Side)
• Reduce standby power in combination with the
control power supply DC24V input.
• Connecting the auxiliary contact MC for the main
circuit power supply to the setting terminal of the
output terminal function [CON] shuts off the power
input to the inverter main circuit while the inverter
output is suspended to implement the operation
sequence for energy saving.
Output
frequency
Operation
command
Contactor control signal
039[CON]
Contactor check signal
112[COK]
▼
(1)
The inverter waits for the output until the start
waiting time passes.
(2)
It turns on the contactor control signal 039[CON]
at the same time.
The operation varies depending on whether the
contactor check signal 112[COK] is set to the
input terminal function.
With If the 112[COK] is not turned on during the
[COK] contactor check time, the inverter trips with the
setting [E110] contactor error.
Without After the contactor control signal 039[CON] is
[COK] turned on, there is a waiting time for the start
setting waiting time to pass.
(3)
After the start waiting time passes, there is an
acceleration.
Inverter outputting
Start
waiting
time
(1)
(3)
(2)
Contactor check time
12-17-11
MC
DC24
V
FW
RV
Contactor release delay time
(4)
(5)
(4)
After the inverter stops the output, there is a
waiting time for the contactor release delay time
to pass.
(5)
After the contactor release delay time passes,
the contactor control signal 039[CON] is turned
off.
(6)
The operation varies depending on whether the
contactor check signal 112[COK] is set to the
input terminal function.
With If the 112[COK] is not turned off during the
[COK] contactor check time, the inverter trips with the
setting [E110] contactor error.
Without The inverter still does nothing.
[COK]
setting
Inverter Functions
R
U
S
V
M
T
W
[CON]
P+
P-
[FW]
[RV]
COM
Contactor check time
(6)