ActiveX for Windows



Modbus Master ActiveX Control for Windows

Thank you for your interest in my Modbus Master ActiveX control for Windows development.

Using the Modbus Master control, you can easily read and write data from any Modbus Device using either the Modbus serial or TCP/IP protocols.

This allows you to easily create your own simple HMI applications and is ideal for remote interrogation of PLC's using your laptop and a serial cable or wireless link.

The control will allow you to interrogate upto 20 devices at once with upto 100 poll blocks for data gathering. The control works in both ASCII and RTU modes with both serial and ethernet connection settings easily configurable.

Changes in remote data is event driven in your application so you do not need to constantly poll for data, you will be informed when any data within one of your poll blocks has changed.

Data can be read and written in any one of 7 different formats which are :

  • Bit
  • Word
  • Unsigned Word
  • Long
  • LongSwap
  • Float
  • FloatSwap

The software supports the following Modbus Functions :

  • 01 - Read Coils
  • 02 - Read Discrete Inputs
  • 03 - Read Holding Registers
  • 04 - Read Input Registers
  • 05 - Write Single Coil
  • 06 - Write Single Register
  • 16 - Write Multiple Registers

Full diagnostic traces are also available via the EventLog.

You can download an evaluation copy of the control by clicking here.

The cost of a single user development license for the ActiveX control is 50 which would allow for unlimited run-time usage. If you require the source code for the ActiveX control to tailor for your own application, this is available at a cost of 250.

If you wish to purchase a license or the source code, you can make a secure debit or credit card payment by clicking the Buy Now button below. I will return the necessary license file upon confirmation of payment which will usually be within 24 hours. Please advise the user name or company name for the license when making the payment.

Click here to buy a single user development license for only 50

Click here to buy the source code for only 250

If you own unique requirements are not covered by the software or you wish to discuss the options further, please do not hesitate to get in touch.

Revision History
Date Version Changes
09/04/05 1.02 Fixed Compatibility Issue With Win 9x/ME
24/11/04 1.01 Added Reset Method
13/12/03 1.00 Initial Release

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Copyright 2006 Jon Welch
Last modified: 12-09-2011