Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 219)

Troubleshooting
Chapter 10
10Ć7
28 Command results in overflow of offset accumulator.
29 Attempted context switch with dual meaning bit on.
30 Attempted context switch while axis is commanding motion.
31 Manual mode only bit(s) on while in auto mode.
32 Invalid motion command bit combination or command not allowed.
33 Invalid command (cannot process new parameters, preset, or offset commands while axis is
in motion).
34 Attempted switch to auto mode before first marker is found.
The flowchart of Figure 10.5 provides a logical procedure to help isolate a
problem with servo positioning assembly operation. You can also use it at
system start-up to check out the servo positioning assembly for proper
operation.
Many of the flowchart boxes that specify corrective actions contain more
than one instruction. When using the flowchart, perform instruction 1
first. If this fails to correct the problem, perform instruction 2, and so on.
Your ladder diagram program should allow you to display parameter,
moveset, command, and status block on an industrial terminal.
Troubleshooting Flowchart