Maintenance; Enhanced Input/Output Function; Multiple Motor Constant Selection; Cooling Fan Mode Selection - Hitachi SJ300 Series Manual

VERSATILE FUNCTIONS ENCOMPASS MORE APPLICATIONS
VERSATILE FUNCTIONS ENCOMPASS MORE APPLICATIONS

Enhanced input/output function

■
Intelligent terminal system is utilized on all input and
output terminals.
Sink/source type logic is user-selectable.
In addition to PWM output termi-
nal (FM), analog current (AMI)
and analog voltage (AM) output
monitor are incorporated as
standard.
The example (right) shows how
a follower inverter can directly
receive the analog output of the
master inverter as its frequency
command.
An auxiliary speed input or"trim" can be made by an
additional analog signal.
FW Motor
O
0-10Ｖ
O2
-10-+10Ｖ
L

Multiple motor constant selection

■
Constants for up to three motors can be set. This added
functionality is useful for controlling (multi-axis) motors
via changeover.

Cooling fan mode selection

■
The cooling fan can be set to operate while the inverter
is running, and stops when the inverter stops. This fea-
ture provides longer cooling fan life, and eliminates fan
noise while the inverter is idle.
PID Control
■
Helps simplify overall system and saves initial cost by
eliminating the need for a separate PID controller, Useful
in many applications where temperature, pressure, flow,
etc. must be controlled.
Easy-removable cooling fan
■
and DC bus capacitor
Field replacement of cooling fan(s) and DC bus capacitors
can be accomplished in a fraction of the time.
3
SJ300
（Master）
FM
AMI （AM）
DC4 - 20mA SJ300
（Follower）
（DC0-10V）
O I （O）
Output
frequency
FW
O-L
〈Auxiliary output〉
O2-L
Deceleration and stop at
■
power failure
SJ300 decelerates and stops the motor using regenera-
tive energy from the motor even though the power is not
supplied. Especially critical in some textile processes.
UP/DOWN speed control
■
Up/Down function fine-tunes output frequency. Conven-
ient for a test-run.
Frequency scaling conversion
■
Displays the output frequency scaled by the conversion
factor for "line" / process speed.
3-wire control
■
"Seal-in" start signal without an external device.
SJ300
Motor
STA
STP
F/R
CM1
P/PI control selection
■
Provides stable control for carrier or trolley (material hand-
ling) operations. Useful for so-called "droop control"
Torque
P Control
N0
INV1
SJ300
SJ300
INV2
Truck
Removable control circuit
■
terminals
Eliminates control rewiring when field replacing the
SJ300.
（Inverter Output）
（Start）
STA
3-wire
（Stop）
STP
PI Control
Either PI control which corrects
slip or P control which does not
correct slip can be selected.
Rotation Speed
PI Control
P Control