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6 PROGRAMMING

6.3 Communications with I/O Modules

This section describes the setting and programming that are required for a CPU to
communicate with I/O modules on a remote I/O station by cyclic transmission.

(1) System configuration example

Remote master station

Remote I/O station (station No. 1)

Power
supply

QCPU QJ71

BR11

QJ72
BR15

QX40 QY40P

Power
supply

(2) Program

conditions

The following processing is performed in the program.
• An input from X0 of the remote I/O station turns ON M1000.
• When M2000 is turned ON, a signal is output to Y0 of the remote I/O station.

(a) Devices used by the user

• Input flag from X0 of remote I/O station ········· M1000
• Output flag to Y10 of remote I/O station ········ M2000

(3) Parameter setting example

(a) Setting for the CPU module of the remote master station

Set network parameters in GX Developer.

• Network type

: MNET/H (Remote master)

• Starting I/O No.

: 0000

• Network No.

: 1

• Total stations

: 1

• Mode

: Online

• Network range assignment:

• Refresh parameters:

(b) Setting for the remote I/O module

Use the default settings. (Refer to Section 5.2.1.)

(4) Program example

Input from remote I/O station X0.

Output to remote I/O station Y10.