CAN-8123/CAN-8223/CAN-8423 user’s manual (Revision 3.00, May/22/2009) ------
18
No. Signal
State
Description
1
No Light
No error
The device is in working
condition.
2
Single Flash
Error Reminding
when Warning
Level is Reached
At least one of the error counters
of the CAN controller has
reached or exceeded the warning
level (too many error frames).
3
Double Flash
Error Reminding
when Events
happen.
A guard event (NMT-Slave or
NMT-master) or a heartbeat
event (Medical Application) has
occurred.
4
Triple Flash
SYNC Error
The SYNC message has not
been received within the specific
communication cycle before time
out (see Object Dictionary Entry
0x1006).
5 Continuing
Light
Bus Off
The CAN controller is in a bus off
condition.
Note: If several errors occur at the same time, the most severe error will have
high priority to show its signal first. For example, if NMT Error (No. =3)
and Sync Error (No. =4) occur, the SYNC error signal will indicate.