is the industry-standard simulator software used by automation engineers to test, debug, and simulate Modbus communication protocols. When you download the software, it operates in a limited trial mode until you unlock its full functionality using a valid registration key .
To ensure software stability, data integrity, and compliance, you should only acquire your license key through official channels. 1. Purchase Options
Choose between a Single User License, a Site License, or a Country License based on your organization's needs.
Essential for long-term troubleshooting of PLCs, sensors, and meters (e.g., WattNode meters ). Registration Key Modbus Poll
Upon successful entry, the "nag screen" will disappear, and the software will be fully activated.
Modbus Poll is not free software. While you can download an evaluation version for free, it comes with significant limitations designed to encourage professional licensing:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Upon successful entry, the "nag screen" will disappear,
Select (this option appears if the software is not yet registered).
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This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Modbus Poll Notes - Continental Control Systems, LLC their policies apply.
However, the trial mode imposes a strict . After 10 minutes of active data polling, the software automatically disconnects from the slave device. While users can restart the application to initiate another 10-minute window, this behavior is disruptive for long-term troubleshooting, register logging, or continuous bench testing. Once the 30-day trial expires altogether, the software blocks new connections entirely until a valid license key is entered. Key Licensing Facts
: The unregistered trial version allows you to test all features but will disconnect after 10 minutes, requiring a restart. Troubleshooting Registration
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