Mitsubishi Electric L02SCPU User's Manual And Reference page 224

(3) Setting items of the predefined protocol support function
(a) Communication type
There are three protocol communication types: "Send", "Receive", and "Send & Receive".
For details on the protocol communication types, refer to the following.
MELSEC-L Serial Communication Module User's Manual (Basic)
(b) Packet elements set for "Packet Setting"
The packet elements include "Header", "Terminator", "Length", "Static Data", "Non-conversion Variable",
"Conversion Variable", "Check Code", and "Non-verified Reception".
Up to 32 elements can be set in a single packet.
The protocol setting method and packet elements are the same as those for the serial communication module,
except for some differences. ( MELSEC-L Serial Communication Module User's Manual (Basic))
The following are the differences.
• Read the C24 (serial communication module) as the CPU module in the manual.
• Buffer memory cannot be set as a data storage area for conversion variables and non-conversion
variables.
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