Test, debug and monitor Modbus slave devices with a fast, clean desktop app. Works on Windows 10/11. No subscriptions, no cloud, no nonsense.
Built for industrial engineers who need reliability, not bloat.
Full support for RTU over serial RS-232/RS-485 and TCP/IP. Reads all four register types: coils, discrete inputs, holding and input registers.
Live register values with configurable poll rates from 100ms. Visual charts, data logging and export to CSV.
Save device configurations as profiles and reload in seconds. Share profiles across your team or between job sites.
Full raw communication log — see every byte sent and received. Essential for debugging and troubleshooting devices.
No cloud, no telemetry, no internet connection required. Your industrial data stays on your machine, always.
Buy once, use forever. No subscriptions, no renewal fees. Free updates included for 12 months after purchase.
A modern alternative to legacy Modbus tools.
| Feature | ModbusManager | Modbus Poll | QModMaster |
|---|---|---|---|
| Windows | ✓ | ✓ | ✓ |
| Modbus RTU | ✓ | ✓ | ✓ |
| Modbus TCP | ✓ | ✓ | ✓ |
| TX/RX log | ✓ | ✓ | ✓ |
| Saved profiles | ✓ | ✓ | ✗ |
| Actively maintained | ✓ 2025 | ✓ 2025 | ⚠ 2022 |
| Price | $119 one-time | ~$150 one-time | Free |
One license per machine. No subscriptions, no hidden fees.