Industrial workstations routinely get updated, requiring you to move your tooling environment. The developer permits moving your registration credentials to a new workspace provided you strictly adhere to a specific cleanup process:
When searching for a , it is essential to distinguish between looking for a product license , a registration key , or cryptographic keys used in secure versions of the protocol.
If you are looking for free tools instead of a paid license, consider these options: Witte Software ordering information - Modbus Tools
Modbus Poll provides several advanced tools for industrial communication testing: Witte Software ordering information - Modbus Tools modbus poll key new
Pirated keys often get blacklisted in software updates, causing sudden application crashes during critical debugging sessions. Frequently Asked Questions (FAQ)
The most significant recent update is the support for . This feature, introduced in Version 13.0.0 (Build 2522) released in February 2026 , allows you to communicate over an encrypted channel. This is a game-changer for industrial cybersecurity, allowing you to test secure Modbus connections just as easily as standard ones. It is currently supported only by the 64-bit Windows version.
If you live in Modbus daily, the Professional license is mandatory for the logging engine alone. If you just need to read a holding register once a month, save your money and stick with the free trial or v8. Frequently Asked Questions (FAQ) The most significant recent
If you are decommissioning an old PC:
A standard single-user license allows you to install and use the key on one computer. If you need to use it on both a field laptop and an office desktop, you should look into volume licensing or site licenses.
: Supports Modbus RTU/ASCII over serial, Modbus TCP/IP, and newer MODBUS/TCP Security for encrypted communications. It is currently supported only by the 64-bit Windows version
Useful for discovering and polling registers on a network.
In a new key (Pro version), you can test "Simulate Slaves" mode (Server mode). Hold Ctrl + S . If it toggles, your key is fully functional.
: How to purchase or activate a commercial license key for the Modbus Poll simulator software?
