by Hudop
Poll, simulate, and stream your Modbus devices, all in one tool
Modbus Tester is a fast tool for engineers and technicians who work with Modbus. Poll and write registers as a Modbus master, or spin up a full slave simulator to emulate devices long before the hardware reaches your desk. Stream live values to MQTT, log straight to Excel, and watch your registers move on real-time charts. From industrial automation to energy management and building systems, everything you need to build, test, and troubleshoot a Modbus network is in one place.
Modbus Read/Write
PowerHud Modbus Tester reads and writes coils and registers on slave devices. All major function codes are supported, with an adjustable poll rate and one-click writes.
Communications
Modbus TCP/IP
Modbus UDP/IP
Modbus RTU over TCP/IP
Modbus ASCII over TCP/IP
Modbus RTU (Serial)
Modbus ASCII (Serial)
Live Chart Option
Values read from the devices can be added into chart series and monitored in real time.
Slave Simulator
Turn the app into a Modbus slave to emulate devices without any hardware. Set values per register, simulate change patterns and errors, and lock it read-only.
Live MQTT Push
Publish register values to any MQTT broker in real time, as a single JSON payload or per-register topics, with QoS and retain options.
Live Chart Option
Values read from the devices can be added into chart series and monitored in real time.
Excel Logging
Log readings straight to an .xlsx file, or stream them live into an open Excel sheet on Windows.
Traffic Monitor
Watch the raw Modbus request and response frames for quick, low-level troubleshooting.
Data Types
Interpret registers as signed or unsigned, Big or Little Endian, word-swapped, or floating point, all in one view.
Download
Version 3.0.0 (latest) Windows Installer (Recommended)
* Files were scanned with latest McAfee and Avast Premium Antivirus programs.
Download Modbus Tester – Single executable file (Recommended) 5.39 MB – Microsoft .Net Framework 6.0 required
Download Modbus Tester – Single executable file 136 MB – Self contained (Larger file size and no Framework is required)
Updates
Version 3.0.0 released. Modbus Slave simulator and MQTT push features added.
Version 2.3.5 – The issue with the RTU communication has been resolved.