Mitsubishi QJ71C24N User Manual page 188

7 DATA COMMUNICATION USING THE BIDIRECTIONAL PROTOCOL
For normal completion
D 0 Interface number
D 1 Reception result
D 2 Receive data count
D 3 Allowable receive data count
D10 Receive data
to
to
D m Receive data
7 - 11
(Program example)
When Q series C24 I/O signals are from X/Y00 to X/Y1F:
(1)
(0)
(n)
(10)
When the received data count is larger than the
allowable received data count, only the data up to
the allowable received data count will be stored
and the excess data will be discarded.
Designate the receive channel.
Clear the receive data count storage device
to 0.
Designate the allowable receive data count.
With the normal completion, the receive
data within the allowable receive data count
(user designated) is read from the receive
data storage area in the buffer memory.
• After the BIDIN instruction is executed,
the user designated read completion
signal (M0) comes on for 1 scan.
• The reading of received data is performed
by the programmable controller CPU.
Q series C24
Address Buffer memory
258 Data reception result
H
600 Receive data count
H
601
H
to
Receive data
7FF
H
MELSEC-Q
7 - 11