Example Of Data Transmission - Mitsubishi MELSEC L Series User Manual

13.4.2 Example of data transmission

External device side
Programmable
controller CPU side
X50
Transmission instruction
Programmable
controller CPU
M0
Completion device
Status display device
M1
at completion
Transmission instruction
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The following shows an example of data transmission:
(1) Example of arbitrary data transmission
Data transmission area
(arbitrary data section)
3 4 1 2 A B 5 6
33 34 31 32 41 42 35 36
H H H H H H H H
OUTPUT
13 COMMUNICATING WITH ASCII CODE (ASCII-BIN CONVERSION)
Eight characters of data
in the transmission area
are sent in two characters
per byte through
ASCII-BIN conversion.
ON
ON
Abnormal
completion
Normal
completion
One scan
(Convert)
121 ASCII-BIN conversion designation
H
1
H
Transmission area
400
H
(Designation of no. of data sent)
00 , 02
H H
(1234 )
H
401
H
12 , 34
H H
(56AB )
H
402
H
56 , AB
H H
Buffer memory
0004 in byte units
H
Sets the arbitrary transmission data for D11 to D12
Sets CH1 to the transmission channel
Sets the number of data sent to 2
Execute the transmission
Sets normal completion flag
Sets abnormal completion flag
(Transmission data)
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