3 - 26
3. SIGNALS AND WIRING
3.4.3
Torque control mode
(1) Torque control
(a) Torque command and generated torque
A relationship between the applied voltage of the analog torque command (TC) and the torque
generated by the servo motor is shown below.
The maximum torque is generated at
±
8V. Note that the torque generated at
±
8V input can be
changed with parameter No. 26.
−
8
+
0.05
+
8
−
0.05
Max. torque
Generated torque
CCW direction
CW direction
Max. torque (Note)
TC applied voltage [V]
Forward rotation (CCW)
Reverse rotation (CW)
Generated torque limit values will vary about 5% relative to the voltage depending on products.
Generated torque may vary at the voltage of
−
0.05V to +0.05V.
The following table indicates the torque generation directions determined by the forward rotation
selection (RS1) and reverse rotation selection (RS2) when the analog torque command (TC) is used.
(Note) External Input Signals
Rotation Direction
Torque control Command (TC)
RS2
RS1
+
Polarity
0V
−
Polarity
0
0
No torque
No torque
0
1
CCW (reverse rotation in
driving mode/forward
rotation in regenerative
mode)
CW (forward rotation in
driving mode/reverse
rotation in regenerative
mode)
1
0
CW (forward rotation in
driving mode/reverse
rotation in regenerative
mode)
CCW (reverse rotation in
driving mode/forward
rotation in regenerative
mode)
1
1
No torque
No torque
No torque
Note. 0: RS1/RS2-SG off (open)
1: RS1/RS2-SG on (short)
Generally, make connection as shown below:
RS1
RS2
SG
TC
LG
SD
−
8 to
+
8V
Servo amplifier
