Mitsubishi Electric MELSERVO-J5 User Manual page 101

Torque limit
The maximum torque is always limited by the values of [Pr. PA11 Forward rotation torque limit] and [Pr. PA12 Reverse rotation
torque limit] during operation.
A relation between limit value and servo motor torque is the same as in the description of the position control mode.
Note that TLA (Analog torque limit) is unavailable.
Page 94 Torque limit
Speed limit
■Speed limit value and speed
The speed is limited to the values set with [Pr. PC05 Internal speed 1] to [Pr. PC11 Internal speed 7] or the value set in the
applied voltage of VLA (Analog speed limit). The relation between the applied voltage in VLA (Analog speed limit) and the
servo motor speed is shown below.
When the servo motor speed reaches the speed limit value, torque control may become unstable. Make the set value more
than 100 r/min greater than the desired speed limit value.
In the initial setting, the rated speed is set to the speed limit value at ±10 V. The speed limit value at ±10 V can be changed
with [Pr. PC12 Analog speed command - Maximum speed].
Servo
motor
Rated speed [r/min]
speed
(Speed limit value)
[r/min]
0 +10/-10
VLA applied voltage [V]
The following table indicates the limit direction according to the combination of RS1 (Forward rotation selection) and RS2
(Reverse rotation selection).
*1
Input device TC (Analog torque
command)
RS1 RS2
Voltage
polarity
1 0 Polarity: +
Polarity: -
0 1 Polarity: +
Polarity: -
*1 0: Off
1: On
*2 For linear servo motors, CCW is the positive direction and CW is the negative direction.
Forward rotation (CCW)
Forward rotation (CCW)
Speed limit direction
VLA (Analog speed limit)
Torque Polarity: +
command
direction
CCW CCW
CW CW
CW CW
CCW CCW
Reverse rotation (CW)
*2
Polarity: -
CCW
CW
CW
CCW
Reverse rotation (CW)
Internal speed limit
CCW
CW
CW
CCW
2 CONTROL MODE
99
2.3 Control mode [A]
2