Speed Control Mode - Mitsubishi Electric MR-J4-10A(-RJ) Instruction Manual

3. SIGNALS AND WIRING

3.6.2 Speed control mode

(1) Speed setting
(a) Speed command and speed
The servo motor is run at the speeds set in the parameters or at the speed set in the applied voltage
of VC (Analog speed command). A relation between VC (Analog speed command) applied voltage
and the servo motor speed is as follows.
Rated speed is achieved at ±10 V with initial setting. The speed at ±10 V can be changed with [Pr.
PC12].
The following table indicates the rotation direction according to ST1 (Forward rotation start) and ST2
(Reverse rotation start) combination.
(Note 1) Input device
ST2 ST1
0 0
0 1
1 0
1 1
Note 1. 0: Off
1: On
2. If the torque limit is canceled during servo-lock, the servo motor may suddenly rotate according to position deviation in respect
to the command position.
Normally, connect as follows.
Speed
[r/min]
-10
CW
direction
VC (Analog speed command)
Polarity: +
Stop
(servo-lock) (servo-lock)
CCW
(no servo-lock)
CW
Stop
(servo-lock) (servo-lock)
24 V DC
2 kΩ
2 kΩ
Japan resistor
RRS10 or equivalent
Note. This diagram shows sink I/O interface. For source I/O interface, refer to section 3.9.3.
Rated speed [r/min]
CCW direction
0 +10
VC applied voltage [V]
Rated speed [r/min]
(Note 2) Rotation direction
0 V Polarity: -
Stop
(servo-lock)
Stop
Stop
(servo-lock)
Servo amplifier
ST1
(Note)
ST2
DICOM
P15R
VC
LG
SD
3 - 45
Forward rotation
(CCW)
Reverse rotation
(CW)
Internal speed command
Stop
(servo-lock)
CW CCW
CCW
Stop
(servo-lock)
Stop
CW
Stop