GT Panel System Menu GTWIN Reference Manual423.1 GT Panel System Menu OverviewBy touching the GT touch panel screen in a certain pattern, you call up the system menu. Thismenu allows you to: adjust the screen's brightness and contrast set the communication settings set the GT internal clock (if available) clear the memory (see p. 46) check the DIP switch settings check the LCD (see p. 47) test the backlight and buzzer (see p. 47) set the GT touch panel (see p. 44) copy SD memory card contents from/to a GT touch panel (see p. 49) perform FP monitoring (see p. 63), e.g. reading and setting registers (see p. 68) etc. What appears on the system menu and how the items are arranged depends on theGT model. When the system menu is displayed, the GT does not communicate with PLC. If you are using general-purpose serial communication, the GT is controlled bycommands from external devices such as a PLC. The GT continues to receivecommands and to write to internal devices even when the system menu is launched.However, while the system menu is displayed, the GT cannot perform the operationsassigned to the internal devices.