ModbusBB is a powerful Modbus Master/Client application for testing and debugging Modbus slave devices. Support for both TCP and RTU protocols with intuitive GUI and CLI interfaces.
30-day trial (15 min per session) - No credit card required
Everything you need for professional Modbus testing and debugging
Connect via Modbus TCP/IP or RTU serial with full configuration options for any industrial device.
Read/Write Coils, Discrete Inputs, Holding Registers, and Input Registers. FC 01-16 supported.
Continuous polling with configurable intervals from 100ms to 10 seconds for real-time monitoring.
Full request/response logging with export functionality for debugging and analysis.
Modern graphical interface plus command-line tool for automation and scripting.
View data as Binary, Decimal, Hex, Float32, or 32-bit Integer. Perfect for any data type.
Scan for Modbus slave IDs, discover valid registers, and monitor connection quality in real-time.
Export poll data to CSV with timestamps. Analyze trends in Excel or any data tool.
Get notified when values change or exceed thresholds. Monitor critical values automatically.
Save device configurations as presets. Switch between devices with one click.
One license for 3 devices. Self-service portal to manage activations. Works offline too.
| Feature | Free Trial | Licensed |
|---|---|---|
| All Modbus Functions | ✔ | ✔ |
| TCP & RTU Support | ✔ | ✔ |
| GUI & CLI Applications | ✔ | ✔ |
| Communication Logging | ✔ | ✔ |
| Device Scanner | ✔ | ✔ |
| Connection Diagnostics | ✔ | ✔ |
| Device Activations | 1 device | 3 devices |
| Session Time | 15 min per session | Unlimited |
| Trial Period | 30 days | Lifetime |
| Updates | ✘ | Free Lifetime Updates |
| Email Support | ✘ | ✔ |
Download the free trial and experience professional Modbus testing today.