Open the Modbus slave software → go to Help → License → System Info . You’ll see something like: HWID: 1A2B-3C4D-5E6F-7890
A small green light icon appeared in the system tray. It pulsed once, twice, and then turned a solid, healthy green. modbus slave license key new
: Connections are automatically disconnected after 10 minutes of activity. Open the Modbus slave software → go to