P300/600 ELECTRONIC VERTICAL FORMAT UNIT

The electronic vertical format unit (EVFU) is used to download vertical tabs to the printer. It allows jumps to preselected lines on the form through vertical moves of the paper.

The maximum form length is 22 inches (176 lines at 8 lpi).

Using the EVFU

Using the EVFU is a two-step process. The first step is to load the channel control table with codes for the form being used. One byte must be loaded for each line of the form. A channel code can be inserted in the byte to indicate a stop (or vertical tab location).

The second step is to send a channel command to jump to a specified channel (location on the paper).

On the following pages are charts and sample programs showing the codes for loading the EVFU table and selecting channels for paper moves.

Points to Remember

When a table is downloaded, VFU will be displayed.

The vertical format type must be set to Emulation VFU through the control panel using the Setup Vertical Format Type Select Emulation VFU menu option.

The GenPtrOpts Group 2 strap to enable received select/deselect must be set to OUT.

Printer option 3 (see Table 11 in Appendix D, Printronix 300/600 Emulation Options) must be enabled to enable EVFU loading. If option 3 is not enabled when a start load RS code is received, the table will not be loaded and all control characters received before the end load US code will be interpreted as data.

When using serial interface with the PI lead enabled, the interface settings menu must have the serial options set to PI Lead Use 8- bit.

Send the EVFU table at the start of a line to prevent a loss of data.

These charts contain the channel commands to load the EVFU table and for selecting a channel for vertical moves.

Chapter 3. Printronix P300/P600 Emulation

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GEK-00029B

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Genicom GEK 00031B manual P300/600 Electronic Vertical Format Unit, Using the Evfu, Points to Remember

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