Rockwell Automation GMLC Reference Manual - Manual (Page 579)

Publication GMLC-5.2 - November 1999
542 Fault Variables
• a jog or a move (in either the positive or the negative direction) has
caused a Hardware_overtravel_fault or a Software_overtravel_fault,
and
• the system response (set in the Fault Action page of the Configure
Axis Use dialog box) is to Disable Drive or Stop Motion.
To correct the problem:
1. Clear the overtravel condition. This can include some or all of the
following steps:
• Reset the controller and turn feedback on, using a Feedback block
(for Disable Control fault action).
• Turn off the hardware or software overtravel checking data bit,
using a Control Settings block (Adjust type).
• Clear the hardware or software overtravel axis fault, using a
Reset Fault block.
• Jog the axis out of the overtravel condition, using a Jog Axis
block.
2. When the axis is out of the overtravel range, use the Control Settings
block to enable the hardware or software overtravel checking data bit.
3. Re-execute the last command.
This fault condition does not appear as an independent fault variable in
either the Tag Window or the Expression Builder.
Illegal Command With Feedback OFF
This fault (Runtime_fault = 17) indicates that, because feedback to a
necessary axis is OFF, the following blocks cannot be executed:
• Analog Offset
• Jog
• Move
• Interpolate Axes