Mitsubishi MELSEC L Series User Manual page 286

(3) The following describes the processing steps taken by the Q series C24 when
External
Q series C24
device
Data
transmission
Data
reception
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performing communication with the transparent code designation and the ASCII-
BIN conversion enabled.
(a) Communication using arbitrary format
1) Receiving
• If a receive transparent code is designated, the additional code
designation data is deleted (removed).
• The arbitrary data section is stored in the reception area of the buffer
memory.
If the ASCII-BIN conversion is designated, the data section is stored in
the buffer memory after it has been converted to binary code data.
• During reception of an arbitrary data section, if the reception-complete
code data or the entire count of receive data has been stored, a
reception-data read is requested of the programmable controller CPU.
2) Sending
• The transmission data designated from the programmable controller
CPU (arbitrary data section of the transmission message) is sent.
If the ASCII-BIN conversion is designated, the transmission data
section is sent after it has been converted to binary code data.
• If a send transparent code is designated, additional code data is added
preceding the transparent code/additional code data, and is then
transmitted.
(Transparent code designation)
No
Adding
Yes
additional
code
No
Delete
Yes
additional
code
12 TRANSPARENT CODES AND ADDITIONAL CODES
(ASCII-BIN conversion designation)
No
ASCII-BIN
Yes
conversion of
transmission data
No
ASCII-BIN
conversion of
Yes
arbitrary data
section
Buffer memory
Transmission
area data
Check receive
Data to be stored
complete code
in the reception area
and received
data count
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