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Modbus Tester Software

Serial Port Monitor is a software to monitor Modbus data communications. This Modbus tester software displays and logs data transferred via serial ports in a system. Further analysis of collected data allows you to detect and solve issues during Modbus testing and debugging.

Additional features of this Modbus test program include search and advanced filters to view only relevant data, built-in terminal to execute text commands. The software can also export data in various formats. Clean user interface is an additional bonus to using the application.

Serial Port Monitor enables you to:

Analyze serial port data

This Modbus test software is capable of connecting to any serial port, even if it is already in use by other applications. Monitoring starts immediately, and since it is conducted in a real time mode all potential problems can be detected and identified at an early stage. You can choose how you would like to view collected data, similar IRPs can be highlighted in different view modes for the purpose of comparison. Monitoring sessions can be saved and you can load them whenever required.

This Modbus analyzer works both as Modbus RTU tester and ASCII data sniffer.

Monitor multiple ports simultaneously

This Modbus test tool allows you to keep an eye on several ports within a single session. You thus can watch several applications talking to various devices via several serial ports at a time. Monitored data is logged on a first-in-first-out basis making it simpler to analyze it.

Choose mode for viewing data

Table, Line, Dump and Terminal – these are modes offered for viewing collected data. Each has its own advantages and disadvantages, for example, Dump view is good for displaying binary, ASCII data and port settings - choose the one that suits your needs best. You can apply filters to view only relevant data; Capture options can be used during the monitoring process.

Emulate sending data to devices

In Terminal mode the software simulates transferring data from a monitored serial port to a device inserted into it. Formats supported include string, binary, octal, decimal, hexadecimal and mixed. This makes it possible to observe how the device responds to a specific command and data.

Compare sessions and send Modbus data to the port again

To improve accuracy of Modbus communication test the software offers a playback feature – you can simulate Modbus data received from the application to the monitored port again. This will provide more precise results, comparing monitoring sessions will display differences between them.
Corporate, OEM & Source code
Whether you're looking at redistributing our Serial Port Monitor technology as a part of your product or considering Serial Port Monitor software for an enterprise-wide deployment, we offer flexible and affordable corporate solutions designed to meet your needs.

Compare STANDARD and PRO/Company versions

# Feature Standard Pro/Company
1 Monitoring serial ports which are already in use
2 Sending/receiving data to/from any COM port (Advanced Send Dialog)
3 The possibility to change COM port parameters from Advanced Send Dialog
4 Any serial port software/hardware can be analyzed
5 Monitor any number of serial ports at once
6 Supports all COM-port types
7 Intercepts all data read from/written to COM port
8 Built-in search
9 4 types of customizable monitoring visualizers for viewing and logging data
10 Incoming and outgoing data streams logging

Let's get started

Serial Port Monitor
Demo version limitations
• fully functional 14-day trial
System Requirements
Windows (32-bit and 64-bit): XP/2003/2008/Vista/7/8/10, Windows Server 2012/2016/2019
Latest Update
Version 8.0.410 (9 Jun, 2021) Release notes