6 Allocation of Buffer Memories
6.13 [BFM #35] CAN Transmission Error Counter
117
FX
3U
-CAN User's Manual
1
Introduc
tion
2
Specifi
cations
3
Inst
allati
on
4
Wi
rin
g
5
Introduc
tion of
Functions
6
All
ocation of
B
uff
er
Memor
ies
7
Interface and
D
evice P
rofile
(40
5 mode)
8
Lift Appl
icati
on
P
ro
file
(417 M
ode)
9
CAN
Layer 2
Mode
10
Comm
and
Interface
6.13
[BFM #35] CAN Transmission Error Counter
FX
3U
-CAN stores the current value of the CAN transmit error counter. The CAN transmit message error
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.
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
3U
-CAN stores the current value of the CAN reception error counter. The CAN reception error counter
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
3U
-CAN is in BUS-OFF status, K256 is stored in this BFM.
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.
Value
Description
K0 to K127
Error active status
Warning level if value is K96 to K127.
K128 to K255
Error passive status
K256
BUS-OFF status
Value
Description
K0 to K127
Error active status
Warning level if value is K96 to K127.
K128
Error passive status
K256
BUS-OFF status
Summary of Contents for FX3U-CAN
Page 1: ...FX3U CAN USER S MANUAL ...
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Page 6: ...Safety Precautions Read these precautions before use 4 MEMO ...
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