Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 27)

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IM 04L31A01-17E
Modbus Master
You can connect other instruments to the CX as Modbus slaves and load measured data
and other data. The loaded data can be handled as communication input data of the
computation function option (/M1) on the computation channel.
The CX acting as a Modbus master use Modbus commands to periodically retrieve data
from the register of Modbus slave devices. The retrieved data is used as communication
input data on the CX.
Note
• This function does not support writing of data to other instruments.
• For details on the Modbus function codes that the CX supports, see section 4.1.
• For a description of the settings required in using this function, see sections 4.2 and 4.3.
Load Data
Modbus master
Modbus slave device
Serial communications
CX
1.3 Serial Communication Function