SMC Networks LECSB2-T Series User Manual

3. SIGNALS AND WIRING
3 - 39
3.6.3 Torque control mode
(1) Torque limit
(a) Torque command and torque
The following shows a relation between the applied voltage of TC (Analog torque command) and the
torque by the servo motor.
The maximum torque is generated at ±8 V. The speed at ±8 V can be changed with [Pr. PC13].
Forward rotation
(CCW)
Reverse rotation
(CW)
Maximum torque
Torque
CCW direction
TC applied voltage [V]
CW direction
Maximum torque
-8
+8
-0.05
+0.05
Generated torque command values will vary about 5% relative to the voltage depending on products.
The torque may vary if the voltage is low (-0.05 V to 0.05 V) and the actual speed is close to the limit
value. In such a case, increase the speed limit value.
The following table indicates the torque generation directions determined by RS1 (Forward rotation
selection) and RS2 (Reverse rotation selection) when TC (Analog torque command) is used.
(Note) Input device
Rotation direction
RS2
RS1
TC (Analog torque command)
Polarity: +
0 V
Polarity: -
0
0
Torque is not generated.
Torque is not generated.
Torque is not generated.
0
1
CCW
(Forward rotation in
power running
mode/reverse rotation in
regenerative mode)
CW
(Reverse rotation in
power running
mode/forward rotation in
regenerative mode)
1
0
CW
(Reverse rotation in
power running
mode/forward rotation in
regenerative mode)
CCW
(Forward rotation in
power running
mode/reverse rotation in
regenerative mode)
1
1
Torque is not generated.
Torque is not generated.
Note.
0: Off
1: On
Normally, connect as follows.
RS2
24 V DC
DICOM
TC
LG
SD
RS1
-8 V to 8 V
Servo amplifier
(Note)
Note.
This diagram shows sink I/O interface. For source I/O interface, refer to section
3.9.3.
Driver

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English