Bfm #22] Save/Restore Configuration - Mitsubishi Electric MELSEC-F FX3U-J1939 User Manual

FX -J1939 User's Manual
3U
5.5

[BFM #22] Save/Restore Configuration

This BFM supports three bits that allow the default configuration of the BFMs to be restored and the
configuration from BFMs to be stored into Flash ROM.
Caution
To prevent accidental destruction of the built-in Flash ROM, bit 0 is held ON for 1 s after the save operation is
completed. If during the time BFM #22 bit 0 is ON another write access to BFM #22 attempts to set bit 0, 1, or
2 to ON, then the first write operation will be completed, but BFM #29 bit 4 "FLASH memory error" will be set
to ON and BFM #22 bits 0, 1, and 2 will not reset to OFF. Any further save operations will be blocked. This
state can be cleared by power cycle or BFM #25 bit 0 reset.
Note
If bit 0 and bit 1 or 2 are set simultaneously, the corresponding BFMs and Flash ROM will be reset to factory
default settings.
Bit
When this bit is set, configuration is saved to Flash ROM
Bit 0
When operation is completed, FX
When this bit is set, all BFMs are reset to default values (factory default).
After all BFMs are reset, BFM #21, #24, #25 bit 2, #26 and #27 are saved to Flash ROM. Save to Flash
Bit 1
ROM is not executed for configuration BFMs.
When operation is completed, FX
Restore default configuration for current mode (Layer 2 or J1939, not saved to Flash ROM)
When only bit 2 is set, corresponding BFM areas are restored to the factory default values but not stored in
Bit 2
Flash ROM. To store changes made to the configuration BFMs, set BFM #22 bit 0 after changing the
configuration.
When operation is completed, FX
Bit 3 to 15 Not used
*1. The BFM areas corresponding to the function mode set in BFM #21 are stored/restored as shown in
the table below:
Saved
Not saved
Saved
Not saved
Saved
Saved
36
-J1939 will automatically reset this bit.
3U
-J1939 will automatically reset this bit.
3U
-J1939 will automatically reset this bit.
3U
Mode
Not saved BFM #40 to #48 64 bit ECU NAME according to J1939-81
BFM #100 to #399
Saved The CAN-ID and data length for Tx messages configured in this data area are
stored to Flash ROM.
Not saved BFM #500 to #973
Saved BFM #1100 to #1267
Saved BFM #1900 to #1927
Not saved BFM #3000 to #3879
5.5 [BFM #22] Save/Restore Configuration
Description
*1
*1
Description
5 Allocation of Buffer Memories
*1
Reference
Section 5.17
Section 7.1
Section 6.2
Section 7.2
Section 5.21 and
Chapter 8
Section 5.22