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MELSEC-Q
4 FUNCTIONS
Slave station
Examples of data transmission (for input)
Nonexecution of swap (Initial setting)
12
H
34
H
12
H
34
H
Upper and
lower bytes
are reversed
to each other.
12
H
34
H
D0
1
1
0
0
b15
b8 b7
b0
to
to
to
to
X0 = 1
X7 = 1
X8 = 0
XF = 0
1
1
0
0
XF
X8 X7
X0
to
to
to
to
CPU
QJ71PB92D
Buffer memory
Slave station
Byte data (I/O) is
mixed with word
data .
Execution of swap
12
H
34
H
12
H
34
H
Upper and
lower bytes
are reversed
to each other.
Swap
processing
12
H
34
H
D0
0
0
1
1
b15
b8 b7
b0
to
to
to
to
X0 = 0
X7 = 0
X8 = 1
XF = 1
1
1
0
0
XF
X8 X7
X0
to
to
to
to
CPU
QJ71PB92D
Buffer memory
Slave station
: For a slave station where byte data (I/O) is mixed with word data, it is
recommended to swap-process only the word data using the sequence program
without executing the swap function.
