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MELSEC-Q
4 FUNCTIONS
4 FUNCTIONS
This chapter explains the functions of the QJ71DN91.
4.1 Master Function (I/O Communication Function)
This function allows I/O data communication with respective slave nodes (up to 63
nodes), using the buffer memory of the QJ71DN91.
Communications of 512 bytes of inputs (up to 256 bytes per node) and 512 bytes of
outputs (up to 256 bytes per node) are available.
Programmable controller CPU
QJ71DN91
Slave node
SET Y11
I/O Communication
Request
MasterFunction
Receive Data
area
0700
H
07FF
H
Master Function
Transmit Data
area
0900
H
09FF
H
Transmit
Receive
X
Y
Master node
(1) Setting for I/O communication with each slave node
(a) Set the information such as connection types or I/O points in Parameters
for Master Function (address: 01D4
H
to 03CF
H
) to exchange I/O data with
each slave node.
(b) Parameters for master function are set in GX Configurator-DN or sequence
programs. (Refer to Section 7.3.)
4
Содержание QJ71DN91
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