Allen-Bradley ControlLogix 1756 - Page 38

Publication 1756-RM084F-EN-P - July 2002
3-18 Creating a Complete Import/Export File
Specifying attributes for an AXIS_SERVO tag
The axis tags differ from the basic tag. The AXIS_SERVO tag has these
attributes:
HomeOffset
Specify the desired offset (any positive number) in position units the axis is to move, upon
completion of the homing sequence, to reach the home position. In most cases, this value
will be zero.
Specify:
HomeOffset := value
MaximumSpeed
Specify the maximum speed (any positive number).
Specify:
MaximumSpeed := value
MaximumAcceleration
Specify the maximum acceleration rate of the axis in position units/second (any
positive number).
Specify:
MaximumAcceleration := value
MaximumDeceleration
Specify the maximum deceleration rate of the axis in position units/second (any
positive number).
Specify:
MaximumDeceleration := value
ProgrammedStopMode
Specify how a specific axis will stop when the controller changes mode or a motion group
stop (MGS) instruction is executed. Enter Fast Disable, Fast Stop, Fast Shutdown,
Hard Disable, or Hard Shutdown.
Specify:
ProgrammedStopMode := text
Attribute: Description:
Attribute: Description:
Description
Provide information about the tag.
Specify:
Description := ” text ”
Comment
Provide information about a tag component.
Specify:
Comment< specifier > := ” text ”
Where the specifier is:
.
bitnumber for a bit in the tag
[
element ] for an array element of the tag
.
membername for a structure member of the tag
MotionGroup
Enter the name of the associated motion group, or enter <NA>.
Specify:
MotionGroup := text
MotionModule
Enter the name of the associated motion module, or enter <NA>.
Specify:
MotionModule := text
ConversionConstant
Specify the number of feedback counts per position unit. Enter a real number from
1.0 to 1.0e
9
.
Specify:
ConversionConstant := value
OutputCamExecutionTargets
Specify the number of output cam execution targets (any positive number).
Specify:
OutputCamExecutionTargets := text
AxisState
Enter Axis-Ready, Direct Drive Control, Servo Control, Axis Faulted, or Axis Shutdown.
Specify:
AxisState := text
PositionUnits
Specify user-defined engineering units (rather than feedback units).
Specify:
PositionUnits := text
AverageVelocityTimebase
Specify the time in seconds for calculating the average velocity of the axis (any
positive number).
Specify:
AverageVelocityTimebase := value