If it is the first time you connect to the Modicon M172 via USB cable and the EcoStruxure Machine Expert HVAC asks you for credentials you will need to use this:
If you want to connect to the WebServer of the M172 and it asks you for credentials the default is:
User: administrator
Password: password
If you want to connect to the WebServer of the M172 and it asks you for credentials the default is:
User: administrator
Password: password