Mitsubishi Electric MELSERVO-J3 Series Manual page 549

16. INDEXER POSITIONING OPERATION
(3) Torque limit
CAUTION
(a) Torque limit and torque
By setting parameter No.PA11 (forward rotation torque limit) or parameter No.PA12 (reverse rotation
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.
(b) Torque limit value selection
As shown below, the forward rotation torque limit (parameter No.PA11), reverse rotation torque limit
(parameter No.PA12) or internal torque limit 2 (parameter No.PC35) can be chosen using the external
torque limit selection (RY(n 2)6).
(Note) RY(n 2) 6
0
1
Note. 0: OFF
1: ON
(c) Limiting torque (RXn4)
RXn4 turns on when the servo motor torque reaches the torque limited.
If the torque limit is canceled during servo lock, the servo motor may suddenly
rotate according to position deviation in respect to the command position.
POINT
In the indexer positioning operation, the torque limit 2 becomes automatically
effective depending on the operation status.
CW direction Max. torque
100
Torque limit value in
parameter No.PA12
Limit value status
Parameter No.PC35
Parameter No.PC35
CCW direction
0 100
Torque limit value in
parameter No.PA11
Parameter No.PA11
Parameter No.PA11
Parameter No.PA11
Parameter No.PA12
Parameter No.PA11
Parameter No.PC35
Parameter No.PA12
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[%]
Torque limit to be enabled
CCW driving/CW CW driving/CCW
regeneration regeneration
Parameter No.PA12
Parameter No.PA12
Parameter No.PC35