Mitsubishi Electric MELSERVO MR-J3 A Series, Instruction Manual

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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
the analog speed command (VC). A relationship between the analog speed command (VC) applied
voltage and the servo motor speed is shown below:
The maximum speed is achieved at 10V. The speed at 10V can be changed using parameter No.
PC12.
Forward rotation (CCW)
Reverse rotation (CW)
-10
Rated speed [r/min]
CCW direction
0 +10
VC applied voltage [V]
CW direction
Rated speed
Speed[r/min]
The following table indicates the rotation direction according to forward rotation start (ST1) and reverse
rotation start (ST2) combination:
(Note 1) External input signals (Note 2) Rotation direction
Analog speed command (VC)
ST2 ST1
Polarity 0V Polarity
Internal speed
commands
0 0
Stop
(Servo lock)
Stop
(Servo lock)
Stop
(Servo lock)
Stop
(Servo lock)
0 1 CCW CW CCW
1 0 CW
Stop
(No servo lock)
CCW CW
1 1
Stop
(Servo lock)
Stop
(Servo lock)
Stop
(Servo lock)
Stop
(Servo lock)
Note 1. 0: off
1: on
2. If the torque limit is canceled during servo lock, the servomotor may suddenly rotate according to position deviation in respect to
the command position.
Generally, make connection as shown below:
ST1
ST2
DOCOM
P15R
VC
LG
SD
2k
2k
Servo amplifier
Japan resistor
RRS10 or equivalent
(Note)
Note. For the sink I/O interface. For the source I/O interface, refer to section 3.8.3.