Open the Modbus slave software → go to Help → License → System Info . You’ll see something like: HWID: 1A2B-3C4D-5E6F-7890
Using the key during the installation or setup phase.
A is a small but critical step to keep your industrial communication stable and legal. Whether you’re a maintenance technician replacing a broken PC or an engineer deploying 50 field devices, understanding how to generate, install, and troubleshoot license keys saves hours of downtime.
: Open the Modbus Slave program.
If you can tell me the (e.g., ModbusTools, Kepware) or device you are using, I can help you find the exact instructions for activating your license. Share public link
Acquiring a new license key removes the 10-minute timeout completely, eliminates all pop-up reminders, and legally authorizes you to use the software for commercial, industrial, or educational engineering purposes. Steps to Buy and Generate a New License Key
To ensure smooth operation and avoid activation headaches: modbus slave license key new
: A 30-day evaluation period is available, though connections are limited to 10 minutes per session until a valid key is entered. versus other simulators like Simply Modbus FAQ - Modbus Tools
Open your Modbus Slave software (e.g., Modbus Slave, Modsim, or a Gateway Configuration Tool). Look for menu items labeled: Help -> Register License Manager Activate New License 3. Enter the Key
After activation, restart the Modbus slave application. You should now see “Licensed to …” or “Unlimited”. Open the Modbus slave software → go to
When you first install Modbus Slave, you receive a 30-day free trial period. After the trial expires, you must enter a valid license key to continue using the software. Purchasing a legitimate license also gives you access to free upgrades—a significant benefit since license keys from 2023 or newer work with all latest versions. If you already own an older license (pre-2023), you can still upgrade, but you'll need a newer key to unlock the latest functionality.
The process for activating a new license key generally follows these steps, though it varies by vendor: