Bfm #750 To #859] Emergency Message Buffer - Mitsubishi Electric MELSEC-F FX3U-CAN User Manual

FX -CAN User's Manual
3U
6.23

[BFM #750 to #859] Emergency Message Buffer

The FX -CAN will store the Emergency messages which are received from the bus to an internal buffer. This
3U
buffer can store up to 22 emergency messages and is separated into an 11 message stack buffer (BFM #750
to #804) and an 11 message ring buffer (BFM #805 to #859). The stack buffer will store the first 11
emergency messages received after Power On or after the Emergency message buffer was cleared the last
time. The ring buffer will store the next eleven Emergency messages; all further received Emergency
telegrams will overwrite the oldest message in the ring buffer. The stack buffer will not be overwritten.
Note
To ensure that the EMCY data is handled in a consistent way, it is necessary to set in BFM #20 bit 0 or 12 to
ON before reading the EMCY data (FROM).
When clearing the entire buffer, write H0 to BFM #750.
BFM No.
BFM #750 Node ID
BFM #751 EMERGENCY data
BFM #752 EMERGENCY data
BFM #753 EMERGENCY data
BFM #754 EMERGENCY data
BFM #800 Node ID
BFM #801 EMERGENCY data
BFM #802 EMERGENCY data
BFM #803 EMERGENCY data
BFM #804 EMERGENCY data
BFM #805 Node ID
BFM #806 EMERGENCY data
BFM #807 EMERGENCY data
BFM #808 EMERGENCY data
BFM #809 EMERGENCY data
BFM #855 Node ID
BFM #856 EMERGENCY data
BFM #857 EMERGENCY data
BFM #858 EMERGENCY data
BFM #859 EMERGENCY data
Name
The Node-ID number which sent the emergency message to the network is displayed.
Emergency error code
1st byte of Manufacturer-specific error
*2
code
3rd byte of Manufacturer-specific error
*2
code
5th byte of Manufacturer-specific error
*2
code
stack
buffer
The Node-ID number which sent the emergency message to the network is displayed.
Emergency error code
1st byte of Manufacturer-specific error
*2
code
3rd byte of Manufacturer-specific error
*2
code
5th byte of Manufacturer-specific error
*2
code (newest message)
The Node-ID number which sent the emergency message to the network is displayed.
(oldest message)
Emergency error code
1st byte of Manufacturer-specific error
*2
code
3rd byte of Manufacturer-specific error
*2
code
5th byte of Manufacturer-specific error
*2
code
ring
buffer
The Node-ID number which sent the emergency message to the network is displayed.
Emergency error code
1st byte of Manufacturer-specific error
*2
code
3rd byte of Manufacturer-specific error
*2
code
5th byte of Manufacturer-specific error
*2
code (newest message)
6.23 [BFM #750 to #859] Emergency Message Buffer
Description
High Byte
*1
(oldest message)
Error register
→ For Error register (object H1001),
2nd byte of Manufacturer-specific error
*2
code
4th byte of Manufacturer-specific error
*2
code
*1
Error register
→ For Error register (object H1001),
2nd byte of Manufacturer-specific error
*2
code
4th byte of Manufacturer-specific error
*2
code
*1
Error register
→ For Error register (object H1001),
2nd byte of Manufacturer-specific error
*2
code
4th byte of Manufacturer-specific error
*2
code
*1
Error register
→ For Error register (object H1001),
2nd byte of Manufacturer-specific error
*2
code
4th byte of Manufacturer-specific error
*2
code
6 Allocation of Buffer Memories
Low Byte
refer to Subsection 5.6.2
refer to Subsection 5.6.2
(newest message)
refer to Subsection 5.6.2
refer to Subsection 5.6.2
(newest message)
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