Basic Formats Of Dedicated Protocol - Mitsubishi Electric MELSEC FX Series User Manual

FX communication
7.4

Basic Formats of Dedicated Protocol

There are two formats for the dedicated protocol; which may be selected by setting special data
register D8120(see chapter 6).
The difference between these two formats is whether CR
The protocols are format 1 and format 4. (The format names conform to the computer link unit for
the A series programmable controller.)
Basic format of transmitted data.
Note:
*1 Whether or not to add sum check code can be selected using the communication format
special data register D8120.
*2 Whether or not to add terminating CR
Control code
Station No.
PLC No.
Command
Message wait
Character
Sum check code *1
(
Control code CR/LF *2
(
+
LF codes is determined by the protocol selected.
+
LF is added to each block or not.
)
)
Computer link 7
7
7-5