If you need to test your modbus master links or simulate modbus slave devices, Winmodbus is for you. Based on years of modbus experience, Winmodbus has been written to make modbus testing and simulation as easy and painless as possible. Get up and running in seconds, build your address map directly from the messages as they appear, see a field by field breakdown of each message, WinModbus is everything you need to make developing and testing your modbus links as quick and easy as possible.

  • See and understand what’s going on : Get Message Explanations, Field Breakdowns and Custom Register Naming.

  • Ethernet TCP and Serial RS-232 / RS-485 support.

  • Protocol Simulator for Modbus RTU, TCP and ASCII.

  • Slave Failure Testing Functions – CRC Fails and Link Breaks

  • Link data to Excel or other packages that support DDE

  • Highly compact. Quick Windows Install/Uninstall.

  • Designed, written and tested in-house by Windows Programmers with years of Modbus experience.

  • “Simple, Elegant, Efficient & Reliable”

“I’ve been browsing around for a good ModBus slave simulator for a while and tested several. Yours is by far the best I’ve tried, it’s very user friendly, easy to connect, professional looking, lots of information right in the main window and it works.

M. R.

“very powerful; way cool”

L. D.

very nice!

M. E.

it worked well giving us confidence to move from desktop to field comms

L. H.

“Anyhow the Winmodbus works a treat.  Straight out of the box so very pleased with it.”

“saved me a load of time.”

A. G.

WinModbus is one of the most useful pieces of software I have bought.

R. W.

WinModbus is really saving me some time doing some testing for an upcoming integration, thanks for your hard work!

G. I.

I am very satisfied about Winmodbus in order to simulate a slave.

S. E.

Bloody brilliant for what I am messing about with here…

…Cheers, good simple software.

S. M.

Try Now

Download the fully functional evaluation version here

  • The evaluation version is fully functional for 14 days. After this, a purchase must be made to continue use.
  • After download, just “Open” the file and it will install on your PC. Once installed, you can run it from the Windows Start Menu
  • If Windows SmartScreen shows a warning during installation, just click “More Info” and then “Run Anyway”. The installer has been checked for viruses/malware and is clean but due to the relatively low volume of installations, Microsoft does not have it in its “clean apps” database.

Buy Now

Price: £62.50

Includes lifetime upgrade to all future versions and e-mail support.