Mitsubishi MELSEC LJ71C24, User Manual

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10 DATA COMMUNICATION USING THE NONPROCEDURAL PROTOCOL
10.2.2 Arrangement and contents of the transmission area and the transmission data
This section explains the arrangement and contents of the transmission area and the
transmission data for performing data transmission using the nonprocedural protocol.
(1) Transmission area
The transmission area is a memory area for storing the data and the data count
that are transmitted from the CPU module to the external device via the C24. By
default, the transmission area is assigned to addresses 400
H
to 5FF
H
(CH1 side)
and 800
H
to 9FF
H
(CH2 side).
Buffer memory
Transmission data count
designation
CH1 side
address
400
H
401
H
5FF
H
(Default setting)
The unit of transmission data count (words/bytes)
is in accordance with the word/byte units
designation in GX Works2.
The transmission data count designated with the
OUTPUT instruction is written.
The transmission data designated with the OUTPUT
instruction is written.
Transmission data
designation
to
T
ransm
is
sio
n
ar
ea
•
•
•