Allen-Bradley ClutchBrake PLC-5 Series - Troubleshoot the Setup of Your Position Monitoring Devices

7–10 Set Up or Simulate Rotary Cam Limit Switches
Publication 65566.5.1 - October 1996
The processor monitors signals from your position monitoring
devices to ensure that the motion:
• is in the forward direction
• progresses through the correct sequence of real or simulated cams
- downstroke
- upstroke
- near top
When the processor detects a malfunction in the operation of
position monitoring devices, it faults and sets one or more of the
following fault bits to help you troubleshoot the fault.
We recommend that you program a method to display bit numbers of
detected faults. Then, you can respond quickly by looking them up
in the following tables (taken from appendix C):
Faults Detected by Processor A
B168/ Suggested Message Cause of Fault Effect of Fault How to Correct the Fault
026* Illegal RCLS Combination Software/hardware cams produced
invalid combination.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
027* Forward Transition
from Top
Software/hardware cams did not go
from top to downstroke.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
028* Forward Transition
from Downstroke
Software/hardware cams did not
enter upstroke.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
029* Forward Transition
from Upstroke
Software/hardware cams did not
enter near top zone.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
033* Forward Shaft Position
Transition Faults
Any of 027029 detected. Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
034* ACAM Upstroke ACAM did not cycle in upstroke. Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
041* Brake Monitor Cam Mis
match Between Processors
Processor A sees the BCAM while
processor B does not.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
042* Takeover Cam Mismatch
Between Processors
Processor A sees the
TCAM while processor B does not.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
043* Antirepeat Cam Mismatch
Between Processors
Processor A sees the ACAM while
processor B does not.
Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
044* Cam Mismatch Fault Any of 041043 detected. Press will stop or not run in
single or continuous mode.
Check software cam logic or hardware
cams for proper operation or settings.
* To clear this latched fault bit, you must turn the modeselect switch to OFF.
Troubleshoot the Setup of
Your Position Monitoring
Devices