Table of Contents
Advertisement
FX
-J1939 User's Manual
3U
5.6
[BFM #24] Baud Rate
Determines the communication speed (baud rate) of the module to the CAN bus. Baud rate change becomes
effective after reset or power cycle.
Caution
Any new valid value written to BFM #21, #24, #25 bit 2, #26 or #27 is automatically stored to flash ROM.
The maximum number of writes to the built-in flash ROM is 10,000 times.
Therefore, when creating a program, do not frequently write to such buffer memories.
Set Value
K10
K20
K50
K100
K125
K250
K500
K800
K1000
Setting prohibited
Other value
If an invalid baud rate is written to BFM #24, the BFM will keep its former value and BFM #29 bit 11 will be
set.
5.7
[BFM #25] Communication Status
Displays the FX
3U
mode and reset module).
Caution
Any new valid value written to BFM #21, #24, #25 bit 2, #26 or #27 is automatically stored to flash ROM.
The maximum number of writes to the built-in flash ROM is 10,000 times.
Therefore, when creating a program, do not frequently write to such buffer memories.
Module restart
When restarting the module, set BFM #25 Bit 0 to ON.
In this case, set data that was not saved will be lost.
Bit
OFF:
Bit 0
ON:
ON when error counter of the CAN controller has
Bit 1
reached its warning level (Error counter 96 to 127)
OFF:
Bit 2
ON:
Bit 3
FX
3U
J1939 Communication Mode
-
-
-
-
-
250 kbps
-
-
-
-J1939 network communication status and sets different control commands (e.g. Online
FROM (Read Access)
Module offline
Module online
*1
Single address capable
Arbitrary address capable
-J1939 node address has changed
Baud Rate
Layer 2 Communication (11 bit ID) Mode/
Layer 2 Communication (29 bit ID) Mode
Access
TO (Write Access)
OFF: No action
ON:
Module restart
Restart is required:
-
After changing the baud rate, node ID or
function mode
-
To recover from BUS-OFF state
Not used
OFF: Clear flag
*2
ON:
No change
5 Allocation of Buffer Memories
5.6 [BFM #24] Baud Rate
10 kbps
20 kbps
50 kbps
100 kbps
125 kbps
250 kbps
500 kbps
800 kbps
1000 kbps
1
2
3
4
5
6
7
8
9
10
37
Advertisement
Table of Contents
