HP V8.5 manual Print mode, Mode signals

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5

T H E O R Y O F O P E R A T I O N

Print mode

When the host asserts the PRINT mode signal, the plotter can generate ASCII characters. Table 5-5 shows the timing relationships for print mode signals.

	Signal	Signal Name	Active	Operation
	Mnemonic	Signal Name	Level	Operation
	Mnemonic		Level

				Selects either print or plot
	PRINT	Print Mode	High	mode. When signal is high,
				plotter is in print mode.

	SPP	Simultaneous	Low	Not used
	SPP	print/plot mode	Low	Not used
		print/plot mode

Table 5-5. Mode signals

ASCII characters are produced as plot patterns on a 16 x 20 dot matrix through the use of a Character Generator ROM. When one complete print line of ASCII-coded data is received, the data is converted into plot patterns. Each character line is executed over 20 plot scans.

5-8	V8.5eRev2.2.2002

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Contents V8.5 Thermal Plotter Copyright Notice TrademarksDisclaimer HaftungsausschlussPage Iii V8.5eRev2.2.2002 Limitation of Liability Contents Operation Maintenance AppendicesV8.5eRev2.2.2002 General Description Media DescriptionAbout this Manual Functional OperationSpecification S Media Electrical TransportInterface Physical EnvironmentalInstallation UnpackingMounting and Positioning Interface Setup Media InstallationInstalling rolled paper Back Panel Roll paper and film path Opening the plotter Lid Installing fan-fold paper Installing rolled film Spindle blocks Power Supply Precautions E R a T I O NUsing the Control Panel Control panelControl panel button functions Rev2.2.2002 Control Panel Functions and Settings Changing function settingsTestplot Default SettingsContrast Speed Media Scaling MenusettingsareF2, F4, F8, tF,PF Emulation vertical resolutionForm feed length E R a T I O N Menusettingsare b1, b2, g1, g2, g3, and g4 Bytes per scanSetup headers for programming the V8.5e Grayscale media table numberSA=4B E R a T I O N Error Messages Byte Line feedFehlermeldungen Power supplies Plotter Functions and FeaturesIntroduction T I O N Stepper motor Interface timing and signalsInterface Data Transfer Clear Data rates Minimum data ratesVerticalresolution Scan widthPrint mode Mode signalsAutomatic Head Temperature Feedback Thermal PrintheadFilm media Media SensorsMaintenance Maintenance Guidelines I N T E N a N C ERegular Maintenance Cleaning the thermal printhead Cleaningtheplatenroller Replacing the fuse Troubleshooting Problems Plotter does not plotPlot has vertical white stripes PlotwithverticalwhitestripesPlot is blotchy or faded Plot contrast is weak Solution PlothasblackverticallinesPlot is wrong length Paper is wrinkling or tearing along one edgePlotter has no power Can’t make changes to control panel settingsPlot output speed is erratic Bloomingplot Form feed stops before desired length Form feed does not stop at top-of-form marksPlot is skewed or unreadable SkewedplotR R a N T Y R R a N T Y C I I T a B L E S Interface Connector PIN Assignment TableB-2. Centronicscablepinoutsstraightthrough Centronics Interface Board Centronics Interface Board Centronics Interface Board