SerialMon is a multiprotocol sniffer/analyzer for serial & network communication. It's designed for troubleshooting gateway/RTU communication, signal testing to control centers, and verifying communication protocols in industrial automation systems.

SerialMon supports IEC 60870-5-101, IEC 60870-5-102, IEC 60870-5-104, ABB RP570, ABB SPA-bus, ABB SPA/TCP, Modbus, NMEA 0183, and various time synchronization protocols. All protocols are included in a single license.

Export to PCAP/PCAPNG for Wireshark analysis, save Events/Alarms to CSV files, export signal lists with user-defined names, or use the native MON/MONX formats. Address Tracker data can be exported for documentation purposes.

Events list all signal value changes chronologically. Alarms track binary signals that go to '1' and remain in the list until acknowledged. Both features are great for end-to-end signal testing and verifying communication to control centers.

Half-duplex uses one serial port with a diode/resistor circuit for protocols like Modbus and RP570 where devices don't talk simultaneously. Full-duplex requires two serial ports to monitor both directions when devices can communicate at the same time.

Address Tracking monitors signal values over time, showing history, changes, polling frequency, and quality information. You can add user-defined names, check deadband settings, and verify signal configuration during General Interrogation (GI).

Use the Address Tracker window and go to File → Import signal list. SerialMon supports CSV files, ABB RTU560 XLSX files, ABB PCU400 XML files, ABB MicroSCADA ASC files, and Svenska kraftnät OF-reg standard files.

Use Network Monitor with an Ethernet switch that has port mirroring enabled, or an Ethernet hub. WinPCAP installation is required.

SerialMon supports various connection types: direct cables, unidirectional/bidirectional line monitors, and in-the-middle connections. For RS485/RS422, you'll need appropriate adapters. We recommend quality FTDI USB-to-RS232 adapters like the FTDI US232R-100.

Yes! Enable the web server and access SerialMon from any device's web browser. View raw/parsed packets, events, alarms, and address tracking from tablets and smartphones. Perfect for remote monitoring during field testing.

Intelligent signals have enhanced functionality in IED mode - they can be automated with different patterns (sinus wave, random, moving values, etc.), linked to commands, and modified with convenient controls. They're created automatically during monitoring or manually in Address Tracker.

Enable the web server in Preferences. SerialMon uses port 8080 by default. Access it via http://localhost:8080 on the same computer, or http://[PC-IP]:8080 from other devices. You can view raw/parsed packets, events, alarms, and address tracking from any web browser.