Terms of use

Last updated: 10 November 2026

Please read this first

These terms apply to the easymodbus.com website: its register maps, guides, downloads and browser tools (together, the “site”). By using the site you agree to them. The register maps describe real industrial and building equipment; the safety section below is the part that matters most.

1. Industrial-control safety — your responsibility

The register maps and guides describe how to read from and write to Modbus equipment that controls real machinery, building services and industrial processes. Working with control systems is inherently hazardous when it is done without a full understanding of the equipment.

Do not change a value, register, point or control logic unless you understand exactly what it does and what will happen when it changes. A Modbus write takes effect immediately, has no undo, and stays in effect until something else overwrites it.
Always consult the equipment manufacturer's documentation — the register/points list, control drawings and user manual — before reading, writing, or changing any point or logic.
You are responsible for correctly identifying addresses, data types, scaling and units, and for verifying the effect of any change on non-critical equipment first where possible.
You are responsible for having the authority and permission to access and modify the equipment you connect to, and for complying with all applicable site rules, codes, standards and laws.
Do not rely on the site for life-safety, emergency, medical, or other systems where a fault, an incorrect value, or a communication interruption could cause injury, loss of life, or significant damage.

If you are not certain what you are doing, stop, and consult a qualified controls engineer and the manufacturer before proceeding.

2. Register maps: accuracy

Each register map is re-typed from the manufacturer's free public documentation, checked against it, and linked to it. Registers still vary by model, firmware, options and configuration, and a transcription can be wrong. Treat every map as a starting point and confirm it against the manufacturer's current document and the live device before you rely on it, and especially before you write to anything. If you find an error, please tell us so it can be fixed.

3. Information, not advice

The site's maps, guides and tools are general information. They are not engineering, safety, or professional advice, and they are not a substitute for the manufacturer's documentation or a qualified professional. The browser tools show possible interpretations of raw values and can be wrong.

4. Trademarks and sources

Manufacturer and product names are used only to identify the equipment a map describes. easymodbus.com is not affiliated with, endorsed by, or sponsored by any manufacturer listed. The original documents remain the property of their publishers; we link to them rather than host them. A manufacturer who would like a map removed can ask at the address below.

5. Using the content

You may use the register maps, downloads and guides in your own work, including commercial work. Please link back to the page when you quote or republish part of it.

6. No warranty

The site is provided “as is” and “as available”, without warranty of any kind, whether express, implied or statutory, to the maximum extent permitted by law. This includes, without limitation, any implied warranties of merchantability, fitness for a particular purpose, accuracy, and non-infringement. We do not warrant that any register map, guide, or tool output will be correct, complete, or safe for your equipment.

7. Limitation of liability

To the maximum extent permitted by applicable law, in no event will First Impact Development, or anyone involved in creating or supplying the site, be liable for any damages of any kind arising out of or in connection with your use of, or inability to use, the site. This includes, without limitation, direct, indirect, incidental, special, consequential, exemplary or punitive damages; loss of profits, revenue, data or goodwill; and damage to, malfunction of, or downtime of any equipment, process or property, and any resulting injury — whether based on warranty, contract, tort (including negligence), or any other legal theory, and whether or not we have been advised of the possibility of such damage.

8. Links to other sites

The site links to manufacturers' documents and other third-party sites. We do not control them, and your use of them is subject to their own terms.

9. Changes

The site and these terms may change over time. The “last updated” date above shows the current version.

10. Contact

Questions about these terms: [email protected]

These terms are provided in good faith and in plain language; they are not legal advice.