Mitsubishi Electric MELSEC iQ-RJ71C24-R2 - Example of Data Reception

16 TRANSPARENT CODES AND ADDITIONAL CODES
16.6 Data Communication Using Bidirectional Protocol
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16
Example of data reception
The following example shows when receiving binary data including a transparent code from a target device.
Transparent code for receiving specification is enabled
Ex.
Transparent code designation: Additional code: 10H (DLE), Transparent code: 02H (STX)
■Program example
For information on the module FB to be used, refer to the following manual.
MELSEC iQ-R Serial Communication Module Function Block Reference
Category Label name Description Device
Module label C24_1 Target module 
C24_1.stnCH1.bSet_Req_ReceptionRead CH1 Reception data read request X3
Label to be defined Define the global label as shown below.
X3
M0
M1
10H05H
B
41H
A
34H12H
(1234H)
BIDIN
ON
ON
42H04H00H
(0004H)
02H11H
(1102H)
06H
43H 44H
LH
67H 01H
LH
E
N
Q
D
L
E
A
C
K
DC
00H , 04H
(B) (A)
42H , 41H
(1234H)
12H , 34H
(D) (C)
44H, 43H
D3
D10
D11
D12
D13
(1102H)
11H , 02H
00H , 04H
(B) (A)
42H , 41H
(1234H)
12H , 34H
(D) (C)
44H , 43H
(1102H)
11H , 02H
Additional code (C24 deletes)
Transparent code
Sum
check
code
Data
length
Data portion
Target
device
C24
Reception data
read request
(Receive data count):
Excluding additional codes
For word unit : 0004H
For byte unit : 0008H
CPU module
Completion device
The following diagram is for word unit
Abnormal
completion
Status display
device
at completion
Normal
completion
Data
length
Un\G1536
1 scan
Un\G1537
Un\G1538
Data
area
Un\G1539
Un\G1540
Buffer memory Program
device memory