7. Troubleshooting
In the error codes, different words have been used for the same thing:
• On the Safety Control Board:
Processor A = A uP = SafetySys1
• On the Safety Control Board:
Processor B = B uP = SafetySys2
Abbreviations in the troubleshooting chapter
PSU = Power Supply
PC = Controller
Open log files with Support Log Reader(SLR).
Go to
www.universal-robots.com/support/
to download Support Log Reader
7.1. Error code
• On the Safety Control Board: Processor A = A uP = SafetySys1
• On the Safety Control Board: Processor B = B uP = SafetySys2
• PSU = Power Supply
• PC = Controller
• LVD = Low Voltage Detected
Error code Description
Explanation
Suggestion
C0A
No error
Communication established Log entry only, no issue
C1A1
Buffer of stored
warnings overflowed
C1A2
Outbuffer to RS485
overflowed (problem
with Controller
message)
C2A
Inbuffer overflow
C3A
Processor
overloaded
Review program or remove
some external controls and
communications
UR5
94
Service Manual
7. Troubleshooting
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