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FX2N-32CAN Communication Module
4.2.7
Error Staus, BFM #29
BFM #29 reflects the error status of the module. Bit 7 shows the status of the FROM/TO
watchdog timer (see section 4.1.7, BFM #26). In case of a watchdog timer error (b7 is ON) an
external emergency message will be sent to the CANopen network if the module is in
operational mode.
When the value 0 is written to BFM #26, the FROM/TO watchdog timer is disabled and b7 of
BFM #29 will never become "1".
Table 4.5: Error Bit Description for BFM #29
b0: general error
b1: reserved
b2: power error
b3: CAN bus off error
b4:EEPROM/flash memory error
b5, b6: reserved
b7: FROM/TO watchdog timer
(reset by writing a value to BFM
#26)
b8: Data queue overflow
Bit
This bit is ON if b2, b3 or b4 are On No general error
Power supply error
CAN bus off error
Data in EEPROM or flash memory is
corrupted
No FROM/TO instruction received
(for the time specified in BFM #26)
Data could not be written to internal
queue
On
Power supply normal
EEPROM and flash memory data
normal
FROM/TO instructions received
regularly
No data queue overflow
Buffer Memory Structure 4.
Off
4-6
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