Mitsubishi Electric Melservo-J2-JR SERIES Instruction Manual page 52

3. SIGNALS AND WIRING
(b) Analog torque command offset
Using parameter No. 30, the offset voltage of -999 to +999mV can be added to the TC applied
voltage as shown below.
(2) Torque limit
By setting parameter No. 28 (internal torque limit 1), torque is always limited to the maximum value
during operation. A relationship between limit value and servo motor-generated torque is as in (2) in
section 3.4.1. Note that the analog torque limit (TLA) is unavailable.
(3) Speed limit
(a) Speed limit value and speed
The speed is limited to the values set in parameters No. 8 to 10 (internal speed limits 1 to 3) or the
value set in the applied voltage of the analog speed limit (VLA).
A relationship between the analog speed limit (VLA) applied voltage and the servo motor speed is
shown below.
When the motor speed reaches the speed limit value, torque control may become unstable. Make the
set value more than 100r/m smaller than the desired speed limit value.
Speed [r/min]
CW direction
The following table indicates the limit direction according to forward rotation selection (RS1) and
reverse rotation selection (RS2) combination:
(Note) External Input Signals
RS1
1
0
Note.0: RS1/RS2-SG off (open)
1: RS1/RS2-SG on (short)
Generally, make connection as shown below:
Max. torque
0
TC applied voltage [V]
Rated speed
CCW direction
10
0 10
VLA applied voltage [V]
Rated speed
RS2
0
1
2k
Japan Resistor
RRS10 or equivalent
Parameter No.30 offset range
999 to 999mV
8( 8)
Forward rotation (CCW)
Speed Limit Direction
Analog Speed Limit (VLA)
Polarity
CCW
CW
Servo amplifier
SP1
SP2
SG
P15R
1k
VC
LG
SD
3 - 27
Reverse rotation (CW)
Internal Speed
Commands
Polarity
CW
CCW
CCW
CW