G-18
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX2N-232IF)
5 Creating Programs
5.4 Buffer Memory (BFM)
5.4 Buffer Memory (BFM)
This section explains the contents of the buffer memory (BFM).
5.4.1 Buffer memory list
BFM
No.
Name Setting range Initial value R/W
#0 Communication format 0087H W
#1 Command 0W
#2 Maximum number of receivable bytes
1 to 512
(when data length is 16-bit)
1 to 256
(when data length is 8-bit)
"0" is handled as "512" or
"256"
0W
#3 Receiving timeout time
1 to 32767 (× 10 ms)
"0" is handled as "no timeout
time".
0W
#4
#5
Sending header (lowest-order 2 bytes)
Sending header (highest-order 2 bytes)
4 bytes maximum,
0 suppression
0 (no header)
0
W
#6
#7
Sending terminator (lowest-order 2 bytes)
Sending terminator (highest-order 2 bytes)
4 bytes maximum,
0 suppression
0 (no terminator)
0
W
#8
#9
Receiving header (lowest-order 2 bytes)
Receiving header (highest-order 2 bytes)
4 bytes maximum,
0 suppression
0 (no header)
0
W
#10
#11
Receiving terminator (lowest-order 2 bytes)
Receiving terminator (highest-order 2 bytes)
4 bytes maximum,
0 suppression
0 (no terminator)
0
W
#12
Receiving suspension waiting time
(in interlink connection mode)
0 to 32767(× 10 ms
)
0W
#13 Amount of remaining send data
0 to 512
(when data length is 16-bit)
0 to 256
(when data length is 8-bit)
0R
#14 Amount of received data buffers
0 to 256+15
*1
0R
#15 Sending sum result 0 R
#16 Receiving sum result 0 R
#20 Time from CS ON to sending start
0 to 32,767(× 10 ms
)
0W
#21
Time from actual sending completion to RS
OFF (complete flag ON)
0 to 32,767(× 10 ms
)
0W
#28 Status 0R
#29 Error code 0R
#30 Model code K7030 R
#1000 Number of bytes to be sent
0 to 512
(when data length is 16-bit)
0 to 256
(when data length is 8-bit)
0W
#1001
to
#1256
Send data buffer 0 W
#2000 Number of received bytes
0 to 512+30
*1
(when data length is 16-bit)
0 to 256+15
*1
(when data length is 8-bit)
0R
#2001
to
#2256
Receive data buffer 0 R
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