Axis Variables - Allen-Bradley Micro800 General Instructions Manual

Programmable controllers

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Table of Contents

Motion control instructions

Axis variables

Axis variables are used to control position, speed, acceleration, and error for a

given motion control axis.

Assigning a variable to an Axis output parameter

In a Function Block Diagram

You can graphically connect the Axis output parameter of a motion control

function block to the AxisIn input parameter of another motion control function

block for convenience. For example, connect MC_POWER Axis output

parameter to MC_HOME AxisIn input parameter. j

In a Ladder Diagram

You cannot assign a variable to the Axis output parameter of a motion control

function block because it is read-only.

Monitoring an AXIS_REF variable

You can monitor an AXIS_REF or a FB_AXIS_REF variable in the software

while connected to the controller, when the motion engine is active, or in the user

application as part of user logic. You can also monitor the AXIS_REF or

FB_AXIS_REF variable remotely through various communication channels.

Rockwell Automation Publication 2080-RM001D-EN-E - February 2015