Samsung 570DXN - Manual (Page 116)

1. The Multiple Display Control is originally set to COM1.
2. If any port other than COM1 is used, COM1 through COM4 can be selected in the Port Selection Menu.
3. If the exact port name that is connected to the LCD Display using a serial cable is not selected, communication will
be unavailable.
4. The selected port is stored in the program and used for the next program as well.
Power Control
1. Click Power Control of the main icons and the Power Control screen appears.