ViewSonic PX748-4K RS-232/LAN Control Protocol Specification - Page 37

Projector RS-232 Protocol 4. Light Source Usage Time status response value format: Response: 0x05 0x14 0x00 0x06 0x00 0x00 0x00 0xB8 0x0B 0x00 0x00 0xDD (checksum) Valu: Byte7~Byte10 0xaa 0xbb 0xcc 0xdd -> HEX2DEC(ddccbbaa) -> real temperature degree Ex. "0xB8 0x0B 0x00 0x00" -> 0x00000BB8 =3000(DEC) -> 3000 hrs . Note: The first byte "0x05" is order 0, Byte0. 5. When the projector response the code "0x00 0x14 0x00 0x00 0x00 0x14" at the first byte "0x00", it indicates that function is disable (grey out). For example, when there are no source inputs to projector, the function "Aspect Ratio" is greyed out and can't be controled by user via OSD menu or RC. 6. HDMI Range:  Enhanced / Full = 0 - 255 steps  Normal / Limited = 16 -235 steps 7. Status explanation: Power On: System is finished all HW/FW settings and ready to work. Warm Up: System is at initial stage to set and check HW/FW environment. Please do not perform other commands. Cool Down: System is at final stage to close HW/FW environment. Please do not perform other commands. Power Off: System is turned off, please set LAN control settings/Standby LAN Control to "ON" for reboot the projector by LAN. *This command is only applied to particular models, please refer to User Guide. 8. The "Mute" function is only active when there is an input source applied. The "Auto Adjust" function is only active when there is an input source of non-digital type applied, such as VGA/Computer1/D-sub. 9. Reset to Factory Default: User has to reboot the projector to clear the parameters. 35 / 35 Projector RS-232 Protocol