Product page
Explains the controller-testing problem, the main workflow, the three user-facing modes, and where monitoring and reporting fit.
HVAC Compressor Control Test Platform
Validate external compressor control logic before site commissioning.
ModbusSim is a Windows desktop application that simulates TT and VT compressor behavior over Modbus TCP or RTU. It lets an engineer connect an external controller, run realistic responses based on field logs plus engineer-estimated curves, monitor command versus response, and keep report-ready evidence from the session.
Modbus TCP and RTU testing
TT and VT compressor families
Behavior model, replay, and calculated mode
Monitoring, reports, and support workflow
Product Direction
Built around the real engineering workflow.
The site answers the questions an HVAC engineer has first: what problem the tool solves, how the workflow works, which mode to use, where to start, and how pricing or support fit into the adoption path.
Documentation area
Guides the visitor by task: quick start, engineering workflow, behavior model, machine log replay, monitor use, and release checks.
Commercial path
Pricing, download, and support stay separate so trial requests, license questions, and technical support remain easy to follow.
Workflow
Show the workflow before abstract concepts.
This is the order used across the home page, product page, documentation, support, and onboarding flow.
1
Connect the controller
Set the compressor type, connection path, and Modbus endpoint so the external application can talk to the simulator immediately.
2
Prepare the behavior model
Use field logs where available and engineer-estimated curves where coverage is missing.
3
Run the scenario
Apply demand, warnings, resets, or fault conditions and observe how the controller and simulated compressor interact.
4
Document the result
Use the Control Quality Monitor and exported report flow to keep evidence for engineering review.
Simple early-access path
The public site keeps the first release simple: visitors can understand the product, request installer access, activate a 14-day machine-bound trial, and contact support by email.
Windows installer request
Machine-bound trial license
Email support
Online checkout planned
Next Page Paths
Start with the pages most visitors need first.
Pricing
Trial, engineering license, and custom project paths handled by request during early access.
Download
Installer, requirements, trial scope, and first-launch checklist.
Support
Task-based help flow, support-package guidance, and planned YouTube tutorial entry points.
Next Action
Start with the workflow, then request the installer.
Review the product workflow and documentation first. When ready, request installer access and then request the 14-day trial license after first launch.