Data Communication Test Software

Simply Modbus Master

Modbus RTU Master and Modbus ASCII Master Software

Free download runs in demo mode with full functionality.

Demo mode allows sending and receiving six request messages.

The demo can be restarted to send and receive more messages.

Features

 Functions as a Modbus RTU Master or Modbus ASCII Master

 Connects to RTU or ASCII Slave devices using the Modbus protocol

All information to send and receive messages is displayed in one window.

       Supported Register Function codes:

       Supported Coil Function codes:

Change the reply data types and byte and word ordering with a click
to determine the format of a reply string without having to send another message.

Supports multiple data types in the same message.

 Supports Standard Modbus and Enron Modbus

Can use RTS delay (required for some radios)

Supports 2 byte slave IDs

A notes column allows labeling the results

Allows saving and restoring settings in Configuration Files.

Write window allows writing single and multiple values

Save the Byte History Log to a text file

Log Data to a tabbed text file

and more...

See the online manual

See the tutorial to Learn about Modbus and How it Works

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Free Download

All unlicensed programs run in demo mode

with full functionality.

Demo mode allows sending and receiving six messages.

The programs can always be restarted to reset the demo
and send and receive more messages.

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Compiler 14

SimplyModbusMaster8.1.2Install.zip
118 MB - click to download

manual

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Compiler 7

SimplyModbusMaster7.1.2Install.zip
8.60 MB - click to download

manual

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Compiler 5 - For windows XP

No Install Program. Just download, unzip and double click the exe file.

SimplyModbusMaster6.4.1.zip
1.70 MB - click to download

manual

Known Issue:  Some users experience version 6.4.1 quitting by itself
or requiring an 'end task' to close properly.

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Purchase

Download the demo and try before you buy.