6 Allocation of Buffer Memories
6.1 Buffer Memories (BFM) Lists
107
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. Allocation of Buffer Memories
6.1
Buffer Memories (BFM) Lists
Caution
• Do not access buffer memory (BFM) that is marked as "Reserved" (Ex. BFM #23, #28, #31 to #34, #40 to
#49, #60 to #99, #400, #443 to #600, etc.) by FROM/TO instructions, etc. There is a possibility to cause
abnormal behavior to the operation of the FX
3U
-CAN if accessing these buffer memories.
• When BFM #21, #24, #26, #27, #59, #70, #71, #100 to #399, #1100 to #1267, #1900 to #1927 are written
to, FX
3U
-CAN stores the state of the corresponding BFM in the built-in flash ROM. The maximum number
of writes to the built-in flash ROM is 10,000 times.
While BFM #25 bit7 is ON, any TO access is prohibited and will generate a BFM #29 bit5 failure!
Note
• When writing to a BFM that contains any bits marked as "Reserved" (Ex. BFM #20 bit 1 to bit 15, BFM #22
bit 2 to bit 15, etc), set such bits to OFF.
There is a possibility to cause abnormal behavior to the operation of the FX
3U
-CAN if setting these flags to
ON.
• Use BFM #22 to store the configuration.
BFM No.
Description
Default
value
Read/
Write
Stored to
Flash ROM
Reference
BFM #0 to #19
Receive/Transmit Process Data
(CANopen
®
modes only)
H0
R/W
-
*1
BFM #20
Data Exchange Control
H0
R/W
-
Section 6.4
BFM #21
Function mode
K405
R/W
Section 6.5
BFM #22
Save/Restore Configuration
H0
R/W
-
Section 6.6
BFM #23
Reserved
-
-
-
-
BFM #24
Baud Rate
K250
R/W
Section 6.7
BFM #25
Communication Status
K0
R/W
-
Section 6.8
BFM #26
FROM/TO Watchdog
K20
R/W
Section 6.9
BFM #27
Node Address
(CANopen
®
modes only)
K127
R/W
Section 6.10
BFM #28
Reserved
-
-
-
-
BFM #29
Error Status
H0
R/W
-
Section 14.2
BFM #30
Module ID code
K7170
R
-
Section 6.12
BFM #31 to #34
Reserved
-
-
-
-
BFM #35
CAN transmission error counter
H0
R
-
Section 6.13
BFM #36
CAN reception error counter
H0
R
-
Section 6.14
BFM #37
Baud Rate display
K2500
R
-
Section 6.15
BFM #38
Sampling Point display
K875
R
-
Section 6.16
BFM #39
BFM setting error display
H0
R
-
Section 6.17
BFM #40
BFM initialisation/online mode write error display
H0
R
-
Section 6.18
BFM #41 to #49
Reserved
-
-
-
-
Summary of Contents for FX3U-CAN
Page 1: ...FX3U CAN USER S MANUAL ...
Page 2: ......
Page 6: ...Safety Precautions Read these precautions before use 4 MEMO ...
Page 227: ......