G-22
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX
2N
-232IF)
5 Creating Programs
5.4 Buffer Memory (BFM)
5. b13 and b12 (absence/presence of check sum and ASCII-Hexadecimal conversion)
The following specification methods are applicable:
1) Neither the check sum nor ASCII-Hexadecimal conversion are provided (b13 = 0, b12 = 0).
2) Only the ASCII-Hexadecimal conversion is provided (b13 = 0, b12 = 1).
3) Only the check sum is provided (b13 = 1, b12 = 0).
4) Both the check sum and ASCII-Hexadecimal conversion are provided (b13 = 1, b12 = 1).
For the check sum addition format, refer to the communication format list above.
<ASCII-Hexadecimal conversion>
When "ASCII-Hexadecimal conversion provided" is specified, the hexadecimal numeric value data (0 to
F) inside the send data buffer (BFM #1001 to 1256) is converted into ASCII data before being sent. And
the received ASCII data is converted into the hexadecimal numeric value data (0 to F) before being
stored in the received data buffer (BFM #2001 to 2256).
The number of sent/received bytes at this time indicates the amount of hexadecimal data.
<Sending format during conversion from hexadecimal data into ASCII data>
Example: When the send data is "10AB
H
", the header is "STX" and the terminator is "ETX"
<Receiving format in conversion from ASCII data into hexadecimal data>
Example: When the received data is "10AB
H
", the header is "STX" and the terminator is "ETX"
b15
0 0 0 1 0 0 0 0 1 0 1 0 1 0 1 1
(Send data buffer BFM #1001)
b0
Data is converted into ASCII data when
being sent.
S
T
X
A B 1 0
E
T
X
02
H
41
H
42
H
31
H
30
H
03
H
1
0
A
B
The number of sent bytes is "2".
1 byte
1 byte
b15
1
0 0 0 1 0 0 0 0 1 0 1 0 1 0 1 1
(Receive data buffer BFM #2001)
b0
0
A
B
S
T
X
A B
1
0
E
T
X
02
H
41
H
42
H
31
H
30
H
03
H
The number of received bytes is "2".
1 byte
1 byte
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
Page 817: ......