Mitsubishi Electric Melservo MR-J3-A Instruction Manual page 92

3. SIGNALS AND WIRING
(3) Ready (RD)
Servo-on (SON)
Alarm
Ready (RD)
(4) Electronic gear switching
The combination of CM1 and CM2 gives you a choice of four different electronic gear numerators set in the
parameters.
As soon as CM1/CM2 is turned ON or OFF, the molecule of the electronic gear changes. Therefore, if any
shock occurs at this change, use position smoothing (parameter No. PB03) to relieve shock.
(Note) External input signal
CM1
CM2
0
0
1
1
Note. 0: off
1: on
(5) Torque limit
CAUTION
(a) Torque limit and torque
By setting parameter No. PA11 (forward torque limit) or parameter No. PA12 (reverse torque limit),
torque is always limited to the maximum value during operation. A relationship between the limit value
and servo motor torque is shown below.
A relationship between the applied voltage of the analog torque limit (TLA) and the torque limit value of
the servo motor is shown below. Torque limit values will vary about 5% relative to the voltage depending
on products.
At the voltage of less than 0.05V, torque may vary as it may not be limited sufficiently. Therefore, use
this function at the voltage of 0.05V or more.
Note. For the sink I/O interface. For the source I/O interface, refer to section 3.8.3.
ON
OFF
Yes
No
ON
OFF
Electronic gear molecule
0 Parameter No. PA06
1 Parameter No. PC32
0 Parameter No. PC33
1 Parameter No. PC34
If the torque limit is canceled during servo lock, the servomotor may suddenly
rotate according to position deviation in respect to the command position.
CW direction
100
Torque limit value in
parameter No. PA12
100
5%
0
0 0.05 10
TLA application voltage [V]
TLA application voltage vs.
torque limit value
100ms or less 10ms or less
Max. torque CCW direction
0
Torque limit value in
parameter No. PA11
2k
2k
Japan resistor
RRS10 or equivalent
3 - 39
10ms or less
[%]
100
Servo amplifier
(Note)
TL
DOCOM
P15R
TLA
LG
SD