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377
Torque Limits
Section 10-4
The override can be set in the range 1 to 32767 (0.01% to 327.67%). The
actual Servomotor speed control range and minimum control unit depend on
the Servo Drive specifications.
While override is enabled, any changes to the override value are enabled
immediately. While override is enabled, the override ratio can be changed dur-
ing operation by setting a new override value in the Axis Operating Output
Memory Area.
Timing Chart
The following timing chart is for when the override function is executed during
a jogging operation.
10-4 Torque Limits
10-4-1 Overview
When using a G5-series Servo Drive, a G-series Servo Drive or a W-series
Servo Drive, torque limits can be applied to Servomotor axis operation in posi-
tion control functions (ABSOLUTE MOVEMENT, RELATIVE MOVEMENT),
ORIGIN SEARCH, ORIGIN RETURN, JOG, SPEED CONTROL, TORQUE
CONTROL, and Stop Functions (DECELERATION STOP, EMERGENCY
STOP).
There are two types of torque limit, one that constantly functions for forward
and reverse rotation and the other that can be disabled/enabled in operating
commands. For speed control, torque limits can also be added to option com-
mand values. (For details, refer to
Option Command Value during Speed Con-
trol
in
10-5-2 Starting Speed Control
.)
When enabling multiple torque limit functions simultaneously, the Servomo-
tor's output torque is limited by the minimum torque limit setting.
3E8 hex (1000)
1000
1500
1388 hex (5000 = 50.00%)
3A98 hex (15000 = 150.00%)
500
Speed command value
(words a+4, a+5)
JOG (word a, bit 09)
Override Enable Bit
(word a, bit 14)
Override (word a+14)
Speed
Receiving Command
Flag (word b, bit 00)
Busy Flag (word b, bit 13)
Jogging starts
(JOG Bit ON)
Override
disabled
Override
enabled
Override
changed
Jogging stops
(JOG Bit OFF)
a = Beginning word of Axis Operating Output Areas specified in Common Para (Axis No.
−
1)
×
25
b = Beginning word of Axis Operating Input Areas specified in Common Para (Axis No.
−
1)
×
25
Time
While override is enabled, the target speed
is obtained by multiplying the speed
command value by the override ratio.
Changes to the override value while
override is enabled are immediately
effective in operations.
The acceleration/deceleration used to
change the speed when switching between
enabling and disabling override or
changing the override value depends on
the acceleration/deceleration operation
setting for the operation being performed.
The Receiving Command Flag turns ON
for at least one cycle time when the
command to start axis operation is
received. The status of this flag does not
change when the override value is
changed.
The status of the Busy Flag does not
change when switching between
enabling or disabling override, or when
the override value is changed.
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 ...