Arrangement And Contents Of The Transmission Area And The Transmission Data - Mitsubishi QJ71C24N User Manual

7 DATA COMMUNICATION USING THE BIDIRECTIONAL PROTOCOL

7.2.2 Arrangement and contents of the transmission area and the transmission data

CH1 side
address
Buffer memory
400
H
401
H
to
5FF
H
(Default)
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This section explains the arrangement and contents of the transmission area and the
transmission data for performing data transmission using the bidirectional protocol.
For details on the contents of transmission data, see Section 7.1.2 (3).
(1) Transmission area
The transmission area is a memory area for storing the data and the data count
that are transmitted from the programmable controller CPU to the external device
via the Q series C24. By default, the transmission area is assigned to addresses
400 to 5FF (CH1 side) and 800
H H
Transmission data count
designation
Transmission data
designation
to 9FF (CH2 side).
H H
•
The unit of transmission data count
(words/bytes) is in accordance with the
word/byte units designation in QSCU.
• Transmission data count
The transmission data count designated with the
BIDOUT instruction is written, and sent as the
data length.
• Transmission data
The transmission data designated with the
BIDOUT instruction is written and then sent.
MELSEC-Q
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