Universal Robots UR5 Service Manual page 193

7. Troubleshooting
C309A Critical error
C309A0 Keep-Alive System
C309A1 Keep-Alive System
C309A2 Keep-Alive System
C309A3 Keep-Alive System
C309A4 Keep-Alive System
C309A5 Keep-Alive System
C309A6 Keep-Alive System
C309A7 Keep-Alive System
C309A8 Keep-Alive System
C309A9 Keep-Alive System
Service Manual
A critical error occurred in
the Keep-Alive System
Critical error
Keep-Alive System
message with wrong
sequence received from
SCB-uPA.
Timeout reached while
waiting for a Keep-Alive
System message from SCB-
uPA.
Go-to-Fault command
received a Keep-Alive
System message from SCB-
uPA.
A Keep-Alive System
message with wrong
sequence received from
SCB-uPB.
Timeout reached while
waiting for Keep-Alive
System message from SCB-
uPB.
Go-to-Fault command
received in Keep-Alive
System message from SCB-
uPB.
Keep-Alive System
message received from an
unauthorized source
uPA handler received an
invalid value
uPB handler received an
invalid value
187
a) Conduct a complete
rebooting sequence
b) Update software
c) Contact your local
Universal Robots service
provider for assistance
UR5