12 Example of Communication between Master Station
12.1 System Configuration
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FX3U-16CCL-M User's Manual
12. Example of Communication between Master Station and
Remote I/O Stations
This chapter explains the procedures from unit settings to parameter settings, programming, and finally
operation check using a system configuration example.
The example which uses a FROM/TO instructions explains read/write of a buffer memory. For the other
methods, refer to the programming manual.
For details on the remote I/O stations, refer to the each remote I/O stations manual.
12.1 System Configuration
It is supposed that three remote I/O stations are connected in the system.
12.1.1 Setting of master station
The figure below shows the setting of the switches in the master station.
FX3U Series
Main unit
Master station
FX
3U-16CCL-M
Terminal
resistor
Remote I/O station
(station No. 1)
Remote I/O station
(station No. 2)
Remote I/O station
(station No. 3)
AJ65BTB1-16D
Input unit
AJ65BTB1-16T
Output unit
AJ65BTB1-16DT
I/O unit
Terminal
resistor
Make sure to set the
master station to 00.
0 ( 10)
0 ( 1)
2 (2.5 Mbps)
Station number setting switch
Transmission rate setting switch