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EVFU 6–5
EVFU Command Codes
The EVFU command codes (top–of–form, vertical tab, start load, and end
load) used in EVFU operation function the same way for both Centronics and
Dataproducts interfaces.
Although the EVFU command codes function the same way, there are two
major differences between the interfaces:
• Each interface requires a different hex code that specifies a channel
number or command code.
• The Dataproducts interface requires the presence of a paper instruction
(PI) in order for the EVFU to function correctly.
EVFU Programming Example
An example of loading a 20 line form program is shown in Figure 6–1 , and
the result of the program in shown in
NOTE: Each entry must be made for every line of form.
Filler channels are used for lines that will not be used by the print program.
Any channel except Channel 1 can be used as a filler. In Figure 6–1,
Channels 2 and 8 are used as sample fillers. Details of this procedure are
described in the following pages.