Yokogawa Touch Screen GP20 User Manual Page 323

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4-3
IM 04L51B01-01EN
Using Modbus Functions (Communicating with Modbus devices)
1
2
3
4
5
App
4.2 Using Modbus/TCP to Enable the GX/GP to
Read Data from and Write Data to Other Devices
(Modbus client function)
The GX/GP can operate as a Modbus client.
The GX/GP can connect to another device (Modbus server) via Modbus/TCP and read from
and write to the device’s internal registers. Read data can be handled using communication
channels. Data that can be written are I/O channel data, math channel data, and
communication channel data.
Modbus server
Modbus client
Ethernet
GX/GP
Command
Input register
Hold register
Read
Write
Read
3XXXXX
4XXXXX
Write
Read
Read
Server device internal register
GX/GP
4.2.1 Setting Basic Network Communication Conditions
Description
Obtain the IP address automatically
Set the IP address manually (when automatic IP address assignment is set
to Off)
For details on the settings, see page 1-123 in section 1.16.1, “Setting Basic Communication
Conditions”.
4.2.2 Configuring the Modbus Client Function
Description
Enable the Modbus client function
Set the communication interval
Set the recovery action
Set the keep connection function
For details on the settings, see “Configuring Basic settings” page 1-132 in section 1.16.6,
“Configuring the Modbus Client Function (/MC option)”.
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