ModbusSim™ is an editable HVAC system simulation and test platform.
ModbusSim is a Windows desktop application for building modular HVAC plant behavior, exchanging Modbus TCP or RTU commands and feedback with external PLCs or controllers, and running the Plant Test scenario stored in the same portable project before site commissioning. It is published by Systèmes ModbusSim Inc.
Product focus
Build an editable HVAC plant, connect your PLC over Modbus TCP or RTU, and test normal operation, faults, and recovery with recorded evidence.
Trademark notice
ModbusSim™ is a trademark of Systèmes ModbusSim Inc. Product names, screenshots, and documentation identify the ModbusSim application and support workflow.
Support channel
For installer, license, technical support, product defect, or policy questions, contact info@modbussim.com.
Payment and Paddle readiness
Early access is handled by email while online checkout is prepared. When Paddle checkout is enabled, Paddle.com is planned to process online orders as the merchant of record for payment, tax, receipts, buyer payment support, refunds, and returns.
Product support remains with Systèmes ModbusSim Inc. through info@modbussim.com.
Policy links
The legal page includes the current website terms, privacy notice, and refund and return policy required before trial, purchase, or support requests.