Configuring The Destination Server; Setting Commands - YOKOGAWA GX20 User Manual

4.2 Using Modbus/TCP to Enable the GX/GP to Read Data from and Write Data to Other Devices (Modbus client function)
4.2.3

Configuring the destination server

Description
4.2.4

Setting Commands

Description
4-4
• Set the server number
• Configure the server settings
For details on the settings, see "Configuring the Destination Server" page 1-189 in section
1.21.6, "Configuring the Modbus Client Function (Option, Function available when /MC is
specified)".
• Set the client command number
• Set the command
For details on the settings, see "Setting Commands" page 1-189 in section 1.21.6,
"Configuring the Modbus Client Function (Option, Function available when /MC is
specified)".
For details on the Modbus functions and registers that the GX/GP supports, see page 4-11 in
section 4.5, "Modbus Function and Register Assignments".
Server Register Number
You can specify an input register in the range of 30001 to 39999 or 300001 to 365536. You
can specify a hold register in the range of 40001 to 49999 or 400001 to 465536.
The register numbers that you can specify vary depending on the type of command.
page 4-11 in section 4.5, "Modbus Function and Register Assignments".
Specifying Register Numbers
Specify the register number on the GX/GP by using the "reference number" (such as the
number 40001 written above). For example, for the YOKOGAWA UT35A digital indicating
controller, the D register number corresponds to the reference number as shown in the
following table.
D-Reg. No.
D2001
For a server that calls the register using a "relative number," add 30001, 300001, 40001,
400001 or a similar number to obtain a reference number.
Register Type Relative Number
Hold register 1004
14567
Input register 0000
Ref. No.
42001
Reference Number Expression
41005 1004+40001
414568 14567+400001
30001 0000+30001
See
IM 04L51B01-01EN