Speed Control Mode - Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual

3. SIGNALS AND WIRING

3.4.2 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.
25.
Speed [r/min]
CW direction
The following table indicates the rotation direction according to forward rotation start (ST1) and
reverse rotation start (ST2) combination:
(Note 1) External input signals
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 servomotor may suddenly rotate according to position deviation in
respect to the command position.
The forward rotation start (ST1) and reverse rotation start (ST2) can be assigned to any pins of
the connector CN1A, CN1B using parameters No. 43 to 48.
Generally, make connection as shown below:
Rated speed [r/min]
CCW direction
10
0 10
VC applied voltage [V]
Rated speed
Analog speed command (VC)
Polarity
Stop
(Servo lock)
CCW
CW
Stop
(Servo lock)
2k
Japan resistor
RRS10 or equivalent
Forward rotation (CCW)
(Note 2) Rotation direction
0V
Stop
(Servo lock)
Stop
(No servo lock)
Stop
(Servo lock)
Servo amplifier
ST1
ST2
SG
P15R
2k
VC
LG
SD
3 - 29
Reverse rotation (CW)
Internal speed
commands
Polarity
Stop
(Servo lock) (Servo lock)
CW
CCW
Stop
(Servo lock) (Servo lock)
Stop
CCW
CW
Stop