5.23 Selecting the Torque Limits
5.23.1 Internal Torque Limits
5-69
5
Device-
S
pecific
S
etting
s
5.23
Selecting the 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.
*
Refer to the following manual for details.
Σ
-7-Series
Σ
-7C SERVOPACK Motion Control User’s Manual (Manual No.: SIEP S800002 03)
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.
5.23.1
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 motor rated 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
External Torque Limits
The torque is limited with an input signal
from the host computer.
Limiting Torque with the
Torque/Force Limit Settings
(OL
14)
*
The TLIM data in a command is used to set
the required torque limits.
Speed control or
position control
–
Limiting Torque with For-
ward External Torque Limit
(OW
09 Bit 8) and
Reverse External Torque
Limit (OW
09 Bit 9)
*
The P_CL and N_CL signals in the servo
command output signals (SVCMD_IO) are
used to set the required limits.
Speed control or
position control
–
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
S
peed
Po
s
ition
Torque
S
peed
Po
s
ition
Torque
S
peed
t
S
peed
Pn40
3
Pn402
t
With Internal Torque Limit
s
Without Internal Torque Limit
s
(Output to the maximum torque i
s
po
ss
ible.)
Torque limit
Maximum torque