ModbusBB
Modbus master, simulator & CLI for Windows + 24/7 SCADA Cloud gateway
...Connect over TCP, RTU, ASCII, RTU-over-TCP or UDP. Read/write coils and registers, inspect raw frames, decode 16/32/64-bit values with byte order, scaling and units. Simulate devices, scan, plot trends, log CSV, set watchdog alerts and automate tests from the CLI.
New in 2.2: ModbusBB SCADA Cloud. Turn any Windows PC into a 24/7 gateway: a Windows service uploads your values to live dashboards, charts (up to 2 years), CSV export and email alerts in any browser at scada.maxenergic.com. Offline buffer, team members. $59 first year, then $89/year, lifetime licence included. ...