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I have to test my modbus slave stack which contains all the modbus functions. But I don't have the Master part ready with me. Can any one suggest me with a Modbus master software for testing my modbus slave code.

You could try ModMaster from:

http://wingpath.co.uk/modbus/modmaster.php

Frank O'Gorman
Wingpath Software Development

Modscan32 from www.win-tech.com is one of the most popular.

Darrin

I find the master at www.simplymodbus.ca works well and is easy to use. There's almost no learning curve.

For Windows applications, check out Automated Solutions website.

Modbus Master ActiveX Control implements a broad range of Modbus functions including some obscure ones, and has support for intentionally generating bad Modbus packets to test your slave device's error handling.

http://automatedsolutions.com/products/modbusrtu.asp

Ready-to-run example apps will have you communicating immediately.

-Mark
http://automatedsolutions.com

Thank you everybody, for the suggestions given till now...

Modbus Test Pro is easy to use (although I may be biased since I helped develop it) and supports the most commonly used functions. The download is fully functional shareware with only a minor nag screen if you don't want to pay for it.

https://www.rogue-engr.com/cportal/index.php?option=com_virtuemart& amp;Itemid=49&vmcchk=1&Itemid=49

Try free tools Modbus Tester and Modbus Scanner from www.modbus.pl.

Regards
Andrzej

I have written a Modbus Tester for serial as well as one for Modbus TCP/IP. Contact John Caldwell at Schneider Electric in New Zealand if you want a copy. (john [dot] caldwell [at] nz [dot] schneider-electric [dot] com)

Hi,

I used to use one call Modbus Poll (http://www.modbustools.com/), I guess they have a newer version now. Very easy to use.

Good luck,

Gonzalo Jimenez Yamasaki
http://www.linkedin.com/in/gonzalojimenezyamasaki
http://sites.google.com/site/gonzalojimenezyamasaki/

This OPC Sever can act as a master. Here is a link to it:

http://www.matrikonopc.com/opc-drivers/128/base-driver-details.aspx

Wassim Daoud
Global Solutions Architect
www.MatrikonOPC.com