Mitsubishi Electric MELSEC iQ-RJ71C24-R2 - Page 362

360
17 COMMUNICATING WITH ASCII CODE (ASCII-BIN CONVERSION)
17.5 ASCII-BIN Conversion for Data Communicated with Bidirectional Protocol
Ex.
Calculation of sum check code
Processing order for data transmission/reception
The processing steps taken by C24 to transmit/receive data with ASCII-BIN conversion and transparent code designation
enabled are explained in the section for transparent codes and additional codes. (Page 339 Handling Transparent and
Additional Codes for Bidirectional Protocol Data Communication)
05 H 30 H 32 H 31 H 32 H 33 H 30 H 30 H 34 H 35 H
L
0012
41
H
5A
42
H 43 H
34 BC
87
H
L
02
H
HH
02
(H) (L)
00H , 02H
34H , 12H
BCH , 5AH
E
N
Q
Buffer memory
(When word units are used)
Message
*1
Sum
check
code
Data length Data portion
Transmission data
count/Receive data count
(0002)
Transmission data/
receive data
ASCII-BIN conversion
Calculation of sum check code
*1
30H+32H+30H+30H+31H+32H+33H+34H+35H+41H+42H+43H=0287H
(H)(L)
(BC3AH)
4
H
12
A
C
K
E
N
Q
00H , 02H
02H , 12H
BCH , 3AH
N
A
K
15
H 33H 34H 06H
L
05
H
0
30
H 32H
2
31
H 32H 30H 32H 80H 02H
1202
HL
30
H 30H
00
L
33
H 41H
3A
42
H 43H
BC
H
31
H 32H
3
(0212H)
(0002H)
(H) (L)
Target device C24
Head data
Buffer memory (transmission area/reception area)
Arbitrary data
(Data
communication)
Transmission
data count/Receive data
count
Send
Sum
check
code
Data length Data section
Conversion
Transmission
data/receive data
Receive
Head data
(Communication of
response massage)
Error code
Receive
Conversion
Transmission
result/reception result
Send
At normal
completion : 0000H
At abnormal
completion : 1234H