Yokogawa Removable Chassis DX1000N - Manual (Page 75)

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IM 04L41B01-17E
Using the Ethernet Interface
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App
Index
1.11 Usage Example of the Modbus Function
Explains the setting example for both Modbus client and server on DX1000s connected
via the Ethernet. This section refers to the DX1000 set to be a Modbus server as DX1000
server and the DX1000 set to be a Modbus client as DX1000 client.
System Configuration and Actions
Uses the measurement channel, computation channel, and communication input data as
described in the figure below. Assumes other conditions are set properly.
DX1000 Server
(Modbus server)
Ethernet
Measured data
Command
Reads a measured data from the server.
Displays the data using the computation
channel (/M1 or /PM1 option).
DX1000 Client
( Modbus client)
Measurement channel 1
Input range: -2.0000 to 2.0000 V
Computation channel 101
- 2.0000 to 2.0000V
Communication input data C01
Modbus service port
502 (by default)
Start the computation.
Display the channel on Group 1
Server number: 1
Action
• The DX1000 client reads the measured value of channel 1 on the DX1000 server into
the communication input data C01. C01 is displayed on a computation channel 101
by including the data in the equation. The computation channel 101 is assigned to
Group1.
• The measured value of channel 1 on the DX1000 server is transferred to the DX1000
client as an integer in the range of –20000 to 20000.
• The DX1000 client displays the read data as –2.0000 to 2.0000 V using the
computation channel 101. The following conversion is applied.
Value on the computation channel 101 of the DX1000 client
= Communication input data C01 x 0.0001