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Vertical Format Units5-16
5.
Bit 7 is low during the CVFU load.
6. A second start load code is received, resulting in reinitialization of the NVFU. (This alĆ
lows
the host data to be restarted.)
When the CVFU memory is cleared, the forms length returns to the previously set value and
the
current print position becomes the top-of-form (TOF).
Relative Line Slewing
Another
method of moving paper using the PI
line results in vertical slews of a specified num
Ć
ber of lines within the form relative to the current print line (rather than slewing to a specific
line).
F
or this to occur, three criteria must be met:
1.
A 1F hex code must have been received;
2.
Data bit 5 must be 1 (set); and
3.
The CVFU must be the selected V
ertical F
ormat Unit.
The
Slew R
elative configuration and the status
of data bits 1-4 determine the number of lines
slewed as described in Table 5-12. (Note that the state of data bit 5 is the difference between
line slewing and using the interface lines as CVFU channel codes.) As long as the CVFU is
selected,
this type of vertical paper motion will occur regardless of whether the CVFU memory
is
loaded or not.
If
the Double High for One Line attribute is active, n + 1 lines will be slewed rather than n lines.