YASKAWA SGD7S series, Product Manual

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6.11 Selecting Torque Limits
6.11.1 Internal Torque Limits
6-63
6
Application Function
s
6.11 Selecting Torque Limits
You can limit the torque that is output by the Servomotor.
There are four different ways to limit the torque. These are described in the following table.
Note: If you set a value that exceeds the maximum torque of the Servomotor, the torque will be limited to the maxi-
mum torque of the Servomotor.
6.11.1 Internal Torque Limits
If you use internal torque limits, the maximum output torque will always be limited to the speci-
fied forward torque limit (Pn402) and reverse torque limit (Pn403).
•
Rotary Servomotors
*
Set a percentage of the rated motor torque.
Note: If the setting of Pn402 or Pn403 is too low, the torque may be insufficient for acceleration or deceleration of
the Servomotor.
Limit Method Outline Control Method Reference
Internal Torque Limits
The torque is always limited with the setting
of a parameter.
Speed control,
position control, or
torque control
6.11.1
External Torque Limits
The torque is limited with an input signal
from the host computer.
6.11.2
Limiting Torque with an
Analog Reference
An analog reference is used to set the
required torque limits. Speed control or
position control
6.11.3
Limiting Torque with an
External Torque Limit and
an Analog Reference The torque is limited by combining torque
limits for an external input signal and torque
limits for an analog reference.
Speed control or
position control
6.11.4
Pn402
Forward Torque Limit
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 800 1%
*
800 Immediately Setup
Pn403
Reverse Torque Limit
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 800 1%
*
800 Immediately Setup
Speed Position Torque
Speed Position Torque
t
Pn40 3
Pn402
t
Without Internal Torque Limit s
(Output to the maximum torque i s po ss ible.)
Maximum torque
S peed
Torque limit
S peed
With Internal Torque Limit s