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4. Configuration
The necessary configuration for Modbus TCP/Modbus RTU communication and polling definition is
handled by a single file named “config.csv”. Just follow the easy-to-use format defined in the
config.csv file to edit the configuration parameters and import the new file via a simple mouse-click,
the data on connected Modbus RTU slave devices can be accessed via Ethernet.
Only the Function code 01/02/03/04 can be used in the config.csv file:
01: Read Coil Status (Read DO)
02: Read Input Status (Read DI)
03: Read Holding Registers (Read AO)
04: Read Input Registers (Read AI)
If you would like to write data to a digital or analog output channel on a Modbus RTU slave device,
the output channel needs be mapped with a local register address in the MDC-700 by editing the
polling definition with using corresponding read function code (01 or 03). Refer to section
for more detailed steps.
The following section intends to guide you to set up your MDC-700 module. After completing the
following steps, you can obtain configuration and other information related to the MDC module and
associated slave devices in your browser.
Basic operating procedure
Step 1:
Export the config.csv file from MDC-700.
Step 2:
Edit the config.csv file.
Note that before editing this file, you should confirm the parameter value for all associated
slave devices.
Step 3:
Import the config.csv file to the MDC-700.
