Mitsubishi MELSEC-F User Manual page 48

3 SPECIFICATIONS
BFM number
Attribute
Decimal
(Hexadecimal)
1610 For fixed buffer
R/W
(651 ) communication
H
3 - 20
Application
Fixed buffer
communication
Transmission/rec
eption
request/Execution
result
Name
When sending request or reception complete
confirmation signal of connection No.1
• For sending
1) Write value
0001H : Sending request
2) Read value
0001H : Transmission ready
0002H : Between data being sent to while
waiting for a response (only when
procedure exists)
0004H : Stored when transmission complete
If instantly receiving the next data,
depending on the timing of FROM
instruction, 0001H is stored without
reading 0004H
0008H : Stored when transmission error
0000H : Stored when the open processing or
close processing is completed
• For receiving
1) Write value
Write value Procedure
Response
transmission
0002H to an
external
device
2) Read value
Read value Procedure
0001H At data reception
Response
0004H transmission
complete
Receiving process cannot be
0008H
normally completed
Stores after open/close
0000H
process
(Continued from the previous page)
Initial value
Decimal
(Hexadecimal)
0
(0000
H
No procedure
Allows the
following data
to be received
No procedure
Acceptance
for the data
reception
complete
(Continues on the next page)
MELSEC-F
Flash ROM Reference
save section
Chapter 6,
)
Chapter 7
3 - 20