Yokogawa Touch Screen GP20 - Manual (Page 327)

4-7
IM 04L51B01-01EN
Using Modbus Functions (Communicating with Modbus devices)
1
2
3
4
5
App
Writing Computed Values to a Server
Example
Write the computed values from channel A001 to registers 40001 and 40002 of instrument A,
in the order lower 16 bits/higher 16 bits. Only the smallest register number need be specified
in commands.
32-bit signed integer
Math channel Register of instrument A
40001
40002 A001 Lower bytes
Higher bytes
Command setting
Setup Item Value
Client command number 6
Command setting Type Write
Server 1
Data type INT32_L
Register 40001
Channel type Math channel
First-CH A001
Last-CH A001
4.2.5 Checking the Modbus Operation Status
Procedure
For the procedure, see page 2-48 in section 2.3.6, “Checking the Command Status of the
Modbus Client and Modbus Master”.
4.2 Using Modbus/TCP to Enable the GX/GP to Read Data from and Write Data to Other Devices (Modbus client function)