Bfm #35] Can Transmission Error Counter; Bfm #36] Can Reception Error Counter; Bfm #37] Baud Rate Display; Bfm #38] Sampling Point Display - Mitsubishi Electric MELSEC-F FX3U-CAN User Manual

FX -CAN User's Manual
3U
6.13

[BFM #35] CAN Transmission Error Counter

FX -CAN stores the current value of the CAN transmit error counter. The CAN transmit message error
3U
counter counts up to K256.
The counter counts 1 or 8 up if a transmission error is detected. For each transmission without error, the
counter counts 1 down.
Value
K0 to K127
K128 to K255
K256
Note
The Warning Level is also shown in BFM #25 bit 1, Error Passive and Bus OFF are shown in BFM #29.
6.14

[BFM #36] CAN Reception Error Counter

FX -CAN stores the current value of the CAN reception error counter. The CAN reception error counter
3U
counts up to K128.
The counter counts 1 or 8 up if a reception error is detected. For each reception without error, the counter
counts 1 down.
However, when FX
Value
K0 to K127
K128
K256
Note
The Warning Level is also shown in BFM #25 bit 1, Error Passive and Bus OFF are shown in BFM #29.
6.15

[BFM #37] Baud Rate Display

Displays the current baud rate of the CAN Controller in units of 0.1 kbps.
6.16

[BFM #38] Sampling Point Display

Displays the current sampling point of the CAN Controller in units of 0.1%.
6.17

[BFM #39] BFM Setting Error Display

BFM #29 bit 6 is set to ON if an attempt to write an invalid value into a Buffer Memory is detected.
BFM #39 displays the address of the target BFM of the invalid write attempt. In case an irregular value was
written to more than one BFM, only the address of the first BFM is displayed. BFM #39 is reset by writing K0
to BFM #29.
6.18

[BFM #40] BFM Initialisation/Online Mode Write Error Display

BFM #29 bit 5 is set to ON if an attempt to write into a Buffer Memory while module is in initialisation mode or
in Layer 2 online mode is detected.
BFM #40 displays the target BFM address of the invalid write attempt. In case an irregular write access is
made to more than one BFM, only the address of the first BFM is displayed. When BFM #29 bit 5 is set to
OFF, BFM #40 will be reset to K0.
Description
Error active status
Warning level if value is K96 to K127.
Error passive status
BUS-OFF status
-CAN is in BUS-OFF status, K256 is stored in this BFM.
3U
Description
Error active status
Warning level if value is K96 to K127.
Error passive status
BUS-OFF status
6 Allocation of Buffer Memories
6.13 [BFM #35] CAN Transmission Error Counter
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