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3 torque control mode, Signals and wiring – MITSUBISHI ELECTRIC MELSERVO MR-J2S- A User Manual

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3. SIGNALS AND WIRING

3.4.3 Torque control mode

(1) Torque control

(a) Torque command and torque

A relationship between the applied voltage of the analog torque command (TC) and the torque by
the servo motor is shown below.
The maximum torque is generated at 8V. Note that the torque 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.
Also the torque may vary if the voltage is low ( 0.05 to 0.05V) 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 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

Torque is not generated.

Torque is not generated.

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

Torque is not generated.

Torque is not

generated.

Torque is not generated.

Note. 0: off

1: on

Generally, make connection as shown below:

RS1

RS2

SG

TC

LG

SD

8 to 8V

Servo amplifier