Motion Error Codes, faults, and attributes 
 
608  Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018 
 
You can read motion status and configuration parameters in your ladder logic 
program using two methods. 
Method  Example 
Directly accessing the 
MOTION_GROUP and AXIS structures 
Axis faults 
Motion status 
Servo status 
Using the GSV instruction  Actual position 
Command position 
Actual velocity 
Use this information to troubleshoot some situations that could happen while you 
are running an axis. 
Why does my axis accelerate when I stop it? 
In some instances, while an axis is accelerating, you try to stop it. The axis keeps 
accelerating for a short time before it starts to decelerate. 
Example 
You start a Motion Axis Jog (MAJ) instruction. Before the axis gets to its target 
speed, you start a Motion Axis Stop (MAS) instruction. The axis continues to 
speed up and then eventually slows to a stop. 
Status and 
Configuration 
Parameters