3
VERSATILE FUNCTIONS ENCOMPASS MORE APPLICATIONS
VERSATILE FUNCTIONS ENCOMPASS MORE APPLICATIONS
0
-
10Ｖ
-
10
-
+10Ｖ
FW
O
O2
L
FW
O2
-
L
O
-
L
〈Auxiliary output〉
Output
frequency
Motor
OI（O）
FM
AMI（AM）
SJ300
（Master）
SJ300
（Follower）
DC4
-
20mA
（DC0-10V）
STA
STP
F/R
CM1
SJ300
（Inverter Output）
（Start）
（Stop）
STA
STP
3
-
wire
Motor
P Control
PI Control
SJ300
INV1
N0
INV2
SJ300
PI Control
P Control
Truck
Rotation Speed
Torque
Intelligent terminal system is utilized on all input and
output terminals.
Sink/source type logic is user-selectable.
An auxiliary speed input ortrimcan be made by an
additional analog signal.
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.
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.
Eliminates control rewiring when field replacing the
SJ300.
■
Enhanced input/output function
■
Deceleration and stop at
power failure
Up/Down function fine-tunes output frequency. Conven-
ient for a test-run.
■
UP/DOWN speed control
Displays the output frequency scaled by the conversion
factor forline/ process speed.
■
Frequency scaling conversion
Seal-instart signal without an external device.
■
3-wire control
Provides stable control for carrier or trolley (material hand-
ling) operations. Useful for so-called “droop control”
■
P/PI control selection
■
Easy-removable cooling fan
and DC bus capacitor
■
Removable control circuit
terminals
Constants for up to three motors can be set. This added
functionality is useful for controlling (multi-axis) motors
via changeover.
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.
■
Multiple motor constant selection
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.
Field replacement of cooling fan(s) and DC bus capacitors
can be accomplished in a fraction of the time.
■
PID Control
■
Cooling fan mode selection
Either PI control which corrects
slip or P control which does not
correct slip can be selected.
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