Firmware: V2.18 / V--
26.10.2022
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5.4.5.1 Status of the CAN bus
The CAN bus status can be read out bit by bit by the application from the variable
CAN_STATE
. The meaning
of the individual bits is shown in the table.
Bit
Mask
Status of the CAN bus
7
16#80
CAN-Bus-Off (CAN bus controller has switched off)
6
16#40
Error counter in CAN bus controller above threshold value
5
16#20
Overflow of the receive buffer in the CAN bus controller
4
16#10
Overflow of the receive buffer in the operating system
3
16#08
CAN bus address conflict
2
16#04
Controller is in alarm state
1
16#02
-
0
16#01
CAN bus enable has been granted by central control
In CODESYS, the defined variable name and the associated IEC address can be looked up using the following
path:
Controller configuration → GLT3010_V2 → System → System state → CAN_STATE
Example in STRUCTURED TEXT:
ADDR_ERR := EXTRACT(CAN_STATE, 3); (* Query the fourth bit from the bottom in the table *)
