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Torque Limits
Section 10-4
10-4-3 Torque Limits Set by Operating Commands
Torque limit functions set by operating commands are executed by turning ON
the Forward/Reverse Rotation Current Limit Bit in the Axis Operating Output
Area and starting the operating command. The
Forward/Reverse Rotation
Current Limit
setting is enabled when the Start Bit for the operating command
turns ON.
When using W-series Servo Drives, the output torque is limited when the Ser-
vomotor is operating according to the set values in the Servo Parameters
For-
ward Rotation External Current Limit
(Pn404) and
Reverse Rotation External
Current Limit
(Pn405) by turning ON the Forward/Reverse Current Limit Des-
ignation Bit when using operating commands.
When using G-series Servo Drives, the output torque is limited when the
Servo Parameter
Torque Limit Selection
(Pn003) is set to 3. The Forward
Rotation Current Limit Designation Bit will be enabled when the PCL is turned
ON. The Reverse Rotation Current Limit Designation Bit will be enabled when
the NCL is turned ON.
PCL ON: When either the Forward Torque Limit (CN1 PCL: Pin 7) or Axis
Output Operating Area is turned ON.
NCL ON
When either the Reverse Torque Limit (CN1 NCL: Pin 8) or Axis
Output Operating Area is turned ON.
Forward Torque Limit
Reverse Torque Limit
A torque limit that has been enabled will continue to function until the For-
ward/Reverse Current Limit Designation Bit is turned OFF and the next oper-
ating command is sent (the specified torque limits continue to be applied even
in Servo lock status after positioning stops).
Note
If the axis stops due to an error during axis operation with the torque limit
function enabled, the torque limit when stopped will depend on the setting of
the Forward/Reverse Current Limit Designation Bit. When the Current Limit
Designation Bit is turned ON only at the start of axis operation, and turned
OFF during axis operation, the torque limit will be disabled if the axis stops
due to an error. Make sure that the Current Limit Designation Bit remains ON
for the interval that the torque limit needs to be enabled.
The Torque Limit Status Flag in the Servo Status Flags in the Axis Operating
Input Memory Area turns ON for the time the torque limit is functioning.
G-series Servo Parameter
Area
Torque Limit Parameters
PCL OFF
PCL ON
Pn05E
Pn05F
NCL OFF
NCL ON
Pn05E
Pn05F
Type
Parameter
No.
Parameter name
Unit
Setting
range
Data
length
Default
setting
---
Pn05E
No.1 torque limit
%
0 to 500
2
300
---
Pn05F
No.2 torque limit
%
0 to 500
2
100
Summary of Contents for CJ1W-NC271 - 12-2009
Page 2: ......
Page 4: ...iv ...
Page 6: ...vi ...
Page 22: ...xxii ...
Page 58: ...30 Starting Operation Section 2 2 ...
Page 244: ...216 Axis Operating Input Memory Areas Section 4 8 ...
Page 264: ...236 Transferring Servo Parameters Section 5 3 ...
Page 396: ...368 Linear Interpolation Section 9 7 ...
Page 648: ...620 List of Error Codes Appendix D ...
Page 674: ...646 Additional Functions for the CJ1W NCF71 MA Appendix F ...
Page 684: ...656 Index ...
Page 686: ...658 Revision History ...