Yaskawa Large Capacity Sigma II Series - Manual (Page 85)

4.1 Settings According to Device Characteristics
4-9
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4.1.3 Limiting Torques
The SGDH SERVOPACK limits torques as follows:
• Level 1: Limits maximum output torque to protect the equipment or workpiece. (Internal
Torque Limit)
• Level 2: Limits torque after the servomotor moves the equipment to a specified position.
(External Torque Limit)
• Level 3: Always limits output torque rather than speed.
• Level 4: Switches between speed and torque limit.
Application of levels 1 and 2 in the torque limit function are described below.
„ Setting Level 1: Internal Torque Limits
Maximum torque is limited to the values set in the following parameters.
This parameter sets the maximum torque limits for forward and reverse rotation.
Use this parameter when torque must be limited due to equipment conditions.
The torque limit function always monitors torque and outputs the signals below when
the limit is reached.
The following signals are output by the torque limit function.
The torque limit is specified as a percentage of rated torque.
If torque limit is set higher than the maximum torque of the servomotor, the maximum torque of the
servomotor is the limit.
Application Example: Equipment Protection
Pn402 Forward Torque Limit Unit:
%
Setting
Range:
0 to 800
Factory
Setting:
800
Speed/Torque
Control,
Position Control
Pn403 Reverse Torque Limit Unit:
%
Setting
Range:
0 to 800
Factory
Setting:
800
Speed/Torque
Control,
Position Control
• /CLT
• Monitor Mode Un006
Condition that outputs a /CLT signal:
Pn50F.0 allocates an output terminal from SO1 to
SO3.
INFO
Motor
speed
Torque limit
Torque
Too small a torque limit will result in a
insufficient torque during acceleration and
deceleration.