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MELSEC-Q
7 DATA COMMUNICATIONS USING BIDIRECTIONAL PROTOCOL
Interface number
Transmission result
Transmission data count
Transmission data
(0001
H
)
(0000
H
)
(0005
H
)
D 0
D 1
D 2
D11
D15
For normal completion
From buffer memory (address 257
H
)
Buffer memory
Data transmission result storage area
Transmission data count designation area
Transmission data designation area
Address
257
H
400
H
401
H
5FF
H
Q series C24
(4241
H
)
(0A0D
H
)
(0001
H
)
(0005
H
)
D 0
D 1
D 2
D11
D15
(4241
H
)
(0A0D
H
)
For abnormal completion
Interface number
Transmission result
Transmission data count
Transmission data
to to
to to
to
(other than 0000
H
)
POINT
(1) The SPBUSY instruction is used to read the execution status when using a
dedicated instruction. (See Chapter 9.)
(2) More than one BIDOUT instruction cannot be executed simultaneously.
Execute the next BIDOUT instruction only after the execution of the first
BIDOUT instruction is completed.