Now available for Windows
Master + Slave.
One app.
ModBus Pro replaces your entire Modbus toolkit. Master polling, slave simulation, and diagnostics in a single modern interface.
7-day trial · No credit card · Windows 10/11
Master Polling — Live register monitoring with per-register data types and scale overrides
Real-Time Monitor — Chart up to 16 register trends with live updating values
Slave Simulator — Simulate Modbus devices with automation and per-register controls
Auto-Discovery — Scan address ranges to find devices and registers automatically
Scripting Engine — Automate Modbus operations with JavaScript and built-in templates
Engineering Tools — Connection testing, CRC calculator, number converter and more
Features
Everything you need.
Nothing you don't.
Other tools sell master and slave separately, charge twice, and look like Windows XP. ModBus Pro puts it all in one modern app.
Tx
Master Polling
FC01-06, FC15-16, FC22, FC23. Modbus RTU and TCP/IP with configurable poll rates.
Rx
Slave Simulator
Simulate up to 10 devices. All data formats including float32, int32, uint32.
○
Live Monitor
Real-time register values in table or chart view. Up to 16 concurrent trend lines.
↻
Auto-Discovery
Scan address ranges to find devices. 80+ built-in register maps.
☰
Data Logging
Log register values over time. Export to CSV or JSON for commissioning reports.
01
Number Converter
Hex, decimal, binary, float32 conversion. All four byte orders side-by-side.
Compare
See how we stack up.
One app, one price, every platform.
|
ModBus Pro |
Modbus Poll + Slave |
Simply Modbus |
| What you get | Master + Slave | Two separate apps | Three separate apps |
| Price | $199 | $258 | $162 |
| Modern UI | ✓ | ✗ Win32 | ✗ Legacy |
| Cross-platform | ✓ | ✗ | ✗ |
| Auto-discovery | ✓ | ✗ | ✗ |
| Free trial | 7 days, full features | 30 days, 10-min limit | Demo mode |
Pricing
Simple, honest pricing.
One payment. Yours forever. No subscriptions.
Personal
For individual engineers
$199
One-time payment, yours forever
- Full Modbus master & slave simulator
- All function codes (FC01–FC23)
- Auto-discovery & scripting
- Data logging & CSV export
- 1 machine activation
Start Free Trial
7-day trial. No credit card required.
Most Popular
Team
For teams up to 5 engineers
$749
One-time — $150/engineer
- Everything in Personal
- 5 machine activations
- Priority email support
- Shared device libraries
- Team license management
Buy Team License
Instant delivery — license key via email
Site License
Up to 10 engineers, one company
$1,699
One-time — deploy across your team
- Everything in Team
- 10 machine activations
- Dedicated support channel
- Custom device library setup
- Volume discounts available
Buy Site License
Instant delivery — license key via email
Download
Get started in 60 seconds.
Install or run portable — your choice. 7-day free trial included.
▢
Windows Portable
.zip · 113 MB · No install needed
Download Zip
v1.0.0 · February 2026
Learn
The Modbus book we wish we had.
95,000 words. 14 chapters. From fundamentals to real-world projects. Written by engineers, for engineers.
Mastering
Modbus
modbus.app
Mastering Modbus
The complete guide to RTU, TCP, troubleshooting, and real-world implementation.