Omron CJ1W-MA - REV 10-2008, Operation Manual

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Override Section 10-3
10-3-2 Override Operation
The override function can be used for the following operations.
• Enabling an Override for a Series of Operations
Set the override beforehand, and execute each operating command with
the Override Enable Bit turned ON. The target speed for the operation will
be the initial speed command value multiplied by the override.
• Switching between Enabling and Disabling Override during Axis Opera-
tion
When the Override Enable Bit is turned ON for an active axis performing
direct operation, origin return, or jogging operation, the speed will change
to the above target speed using the acceleration/deceleration set in the
Servo Parameters for acceleration/deceleration (the acceleration/deceler-
ation speed enabled for the present operation).
When using speed control, the speed can be changed without using accel-
eration/deceleration by using the Override Enable Bit during axis opera-
tion, however, the linear acceleration/deceleration curve can be applied to
the speed change by setting the
Soft Start Acceleration/Deceleration Time
in the Servo Parameters. (For details on the acceleration/deceleration
curve, refer to
7-4 Acceleration and Deceleration Operations . For details
on speed control, refer to 10-5 Speed Control .)
If the Override Enable Bit is turned OFF, the speed is changed in the same
way as when the Override Enable Bit was ON from the present target
speed (speed command value multiplied by override value) to the speed
set in the speed command value.
Axis Operating Output Memory Areas (Operating Commands)
a = Beginning word of Axis Operating Output Areas specified in Common
Para (Axis No.
−
1)
×
25
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.
Name Word Bits Contents
Override Enable Bit a 14 0: Override disabled.
1: Override enabled.
Override a+14 --- Override ratio
Unit: 0.01%
Command range: 1 to 32,767 (0001
hex to 7FFF hex)