I can’t control the By-Alarm system from the various By-me touch screens (art.21554, 21553.2, etc.) or from the Webserver.

To manage the By-alarm system from By-me devices (WebServer, Touch) you must have correctly configured the WebServer and must check, on keypad 01705, that the “PC – CONTROL UNIT” parameter is enabled, i.e. set to “YES”.