NCR NCR7454 manual Set Screen Save Blank, Set Screen Save Walk, Turn On Screen Save

	Chapter 6: NCR 7454 4x20 Customer Display 6-11
	Set Screen Save Blank
Format:	1B 09
Description:	This command is intended to preserve the life of the display hardware
	unit. The firmware maintains a five-minute timer that triggers this
	feature. The Screen Save feature can be disabled through a command
	from the host software. When the feature is not disabled, two specific
	options exist. The Set Screen Save Blank operation causes the display to
	go blank when the timer expires. When the firmware receives the
	command code, the Screen Save mode is canceled and the five-minute
	timer is established. Screen Save Blank removes power from the Retail
	VFD and does not refresh the display in the same manner as the Set
	Low Power On command. At power up, the timer is established at five
	minutes and Screen Save Blank is established as a default. The five
	minute timer is not reset by any invalid or incorrect command.
	Set Screen Save Walk
Format:	1B 0A
Description:	This command causes the visible display to walk right to left when the
	Screen Save timer expires (five minutes). The characters on the display
	will appear to walk across the corresponding display row from right to
	left. The four lines in the 4x20 Display will walk in parallel completely
	off the left side of the display and then the four lines will appear to
	come back from the right. If the display is space filled, then no effect is
	perceived even though the walking is taking place. The Screen Save
	Blank mode is the default mode after power up.
	Turn On Screen Save
Format:	1B 0B
Description:	This command causes the one of the screen save functions (Set Screen
	Save Blank or Set Screen Save Walk) to activate immediately rather
	than waiting for the screen save timer to expire. If the Disable Screen
	Save Option command is in effect when this command is issued, it is
	canceled and the screen saver is enabled and activated immediately.