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4
FUNCTIONS
4
4 - 2
(1) Reading/writing I/O data
(a) Where to be stored
The I/O data are stored in the following buffer memory of the QJ71PB93D.
Input data: Input send area (Buffer memory address: 100
Output data: Output receive area (Buffer memory address: 0
(b) Read/write methods
Read or write I/O data (from the buffer memory) to devices in CPU module
by the following methods.
Read/Write Methods
Automatic refresh
Dedicated instructions (BBLKRD, BBLKWR) Sequence program
MOV or FROM/TO instructions
(2) Sending/receiving I/O data
The sending and receiving process is described below.
(a) The I/O communication signal (X01) turns on when the QJ71PB93D is ready
to communicate with the master station.
(b) When the I/O communication signal (X01) turns on, data output from the
master station are stored into the output receive area (Buffer memory
address: 0
to BF
H
(c) When sending input data to the master station, write the initial value to the
input send area (Buffer memory address: 100
(d) Turning on the input send area refresh directive signal (Y00) starts input
data communication.
Turning off the signal stops the input data communication.
Setting Location
GX Configurator-DP
Sequence program
).
H
MELSEC-Q
to 1BF
)
H
H
to BF
H
H
Data Consistency Function
Available
Not available
to 1BF
).
H
H
4 - 2
)
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