Line spacing may be mixed on the same form, but should be done with caution to avoid unpreF dictable results.

VFU Deselected - If any VFU is deselected from the control panel, the VFU data is ignored and the forms length definition returns to the previously set value. The current print position becomes the top-of-form.

VFU Load/Save/Clear

One VFU table can be saved in Non-Volatile Memory (NVM) at a time. The VFU table forF mat is: VFU type, LPI, and VFU channel data.

Load - Upon printer powerup or printer reset, a previously saved VFU will be loaded if the saved VFU table matches the VFU type (see page 3-18). Upon loading the VFU, LPI will be set to the value stored in the VFU table if the saved VFU was loaded using the 6 or 8 lpi DVFU or NVFU Start Load code.

Save - From the control panel, VFU TABLE SAVE writes the current VFU table into Non-Volatile memory. Skip-over perforation and forms length values are not saved from this selection.

Clear - The VFU can be cleared by pressing ENTER at the VFU TABLE CLEAR configuraF tion menu, control code (SFCC @), changing printer protocol, changing VFUs, loading paF rameters, or by loading a new VFU format. When DISABLE is selected as the VFU type, the previously loaded VFU data is not cleared and will still be in effect if reselected.

P-Series EVFU

The EVFU may be selected in P-Series protocol. The EVFU provides 16 channels to identify up to 192 lines. The programming sequence is 1) start load code; 2) line identification code; and 3) end load code.

Start Load Code - 1E or 6E Hex

The start load code clears and initializes the EVFU memory for the memory load program. The start load code is 1E hex when the PI line is disabled (low) or 6E hex when the PI line is enabled (high).

Channel Assignment

The EVFU memory has the capacity for 192-line forms. The first line identification code (channel code) in the memory load program defines the first line on the form; the second line identification code defines the second line on the form, etc. Each line must have a line identifiF cation code. Filler channel codes are used for lines that will not be accessed by the print proF gram. Any channel code can be used as a filler except channel code 1, which is reserved for the top-of-form, and channel code 12, which is reserved as the vertical tab channel. The same filler channel code can be repeated as necessary for any number of lines.

5-2

Vertical Format Units

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Printronix P9000 Series manual Series Evfu, VFU Load/Save/Clear, Start Load Code 1E or 6E Hex, Channel Assignment