Hitachi WJ C1 Series User Manual

Appendix
A-2-2
M
Name
Description
Main power
supply
Supplies power to R,S,T
terminals using the power
supply required for inverter
driving.
MFG No.
Manufacturing No.
The serial number.
N
Name
Description
ND rating
Normal duty: One of the load
ratings that indicates the rated
current and overload current
rating. Generally used when
load conditions are severe.
P
Name
Description
Phase loss
The unstable state of
input/output due to some
power wiring being
interrupted.
PLC
Programmable logic controller
PMM
Permanent Magnet
synchronous Motor.
Power LED [PWR]
Indicates the input status of
the control power supply. The
main circuit power supply may
remain due to the wiring even
if the LED is not lit.
PWM
Pulse Width Modulation
This is the pulse output
method of the inverter.
R
Name
Description
Regeneration
When the fan is turned by
wind, or when the motor is
decelerated, the power
generated on the motor side is
returned to the inverter.
Regenerative
converter
Option that allows
regenerative power to be
returned to the power supply.
Significantly suppresses the
power supply harmonic
current.
Regenerative
braking unit
The regenerative power can be
consumed by the braking
resistor.
(Depending on the model,
there are built-in and non-
built-in braking resistor
operation circuits. Select and
connect an appropriate
braking resistor.)
RTU
Remote terminal unit.
Here, the name of Modbus
protocol.
S
Name
Description
Sink logic
Difference in common for
input and output terminals.
With sink logic, for example,
when using PLC output unit,
current flows from the inverter
input terminal side to the
output unit side when the
inverter input terminal is ON.
SM
Synchronous Motor. PMM is
one of SM.
Source logic
Difference in common of input
and output terminals. With the
source logic, for example,
when using PLC output unit,
current flows from the output
unit side to the inverter input
terminal side when the inverter
input terminal is ON.
Specification
label
A label with inverter
specifications attached to the
side of the product.
U
Name
Description
UL standards
Standards published by UL
LLC.
User's Guide
Instruction manual showing
detailed information necessary
for handling the inverter.
W
Name
Description
WOP
Remote operator available in
WJ-C1. In addition to normal
operation, Read/Write
function of the parameter can
be used.

Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English