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MELSEC-F
SPECIFICATIONS3
3 - 19
(Continued from the previous page)
BFM number
Attribute Application Name
Initial value
Decimal
(Hexadecimal)
Flash ROM
save
Reference
section
Decimal
(Hexadecimal)
1610
(64A
H)
R/W
For fixed buffer
communication
Fixed buffer
communication
Transmission/
reception
request/Execution
result
When sending request or reception complete
confirmation signal of connection No.1
• For sending
1) Write value
0001
H : Sending request
2) Read value
0001
H : Transmission ready
0002
H : Between data being sent to while
waiting for a response (only when
procedure exists)
0004
H : Stored when transmission
complete If instantly receiving the
next data, depending on the
timing of FROM instruction, 0001
H
is stored without reading 0004
H
0008H : Stored when transmission error
0000
H : Stored when the open processing
or close processing is completed
• For receiving
1) Write value
2) Read value
0
(0000
H)
Chapter 6,
Chapter 7
1611
(64B
H)
R/W
When sending request or reception complete
confirmation signal of connection No.2
(Same as connection No.1)
1612 to 1663
(64C to 67F
H)
— System area — — —
Write value Procedure No procedure
0002
H
Response
transmission
to an
external
device
Allows the
following data
to be received
Read value Procedure No procedure
0001
H At data reception
0004
H
Response
transmission
complete
Acceptance
for the data
reception
complete
0008
H
Receiving process cannot be
normally completed
0000
H
Stores after open/close
process