Mitsubishi FX3U-USB-BD User Manual page 598

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