Chapter  3        Programming 
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3.15.2  Modbus-TCP master (client) 
Modbus-TCP master function is supported by CPU ROM VER.3.5.3.42 or higher version. 
Right click on “Device” and choose “Add Device...”. 
“Add Device” window appears. 
Click “Ethernet” and [Add Device] button. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
With “Add device” window opened, click “Ethernet” in the device tree. Then available devices will be shown in 
the “Add Device” window. Click “Modbus TCP master” and [Add Device] button 
 
 
 
 
 
 
 
 
 
 
 
With “Add device” window opened, click “Modbus_TCP_master” in the device tree. Then “Modbus TCP Slave” is 
shown  in  the  “Add  Device”  window.  Click  “Modbus TCP  slave”  and  [Add  Device]  button  according  to  your 
Modbus system configuration. e.g. if 3 slaves are to be controlled, add 3 times of slave devices.