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Vertical Format Units5-6
1.
The PI line must be enabled and set high;
2.
Data bit 5 must be 1 (set); and
3.
The EVFU 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 5-3. (Note that the state of data bit 5 is the difference between
line
slewing and using the
interface lines as EVFU channel codes.) As long as the EVFU is se
Ć
lected,
this type of vertical paper motion will occur
regardless of whether the EVFU 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.
Table 5-3. P-Series EVFU Line Slewing
ASCII Lines Slewed
Hex PI 7 6 5 4 3 2 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Dec
X = Undefined, 0 or 1 1 = High 0 = Low
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1
0
0
0
0
1
1
1
1
1
1
1
1
0
1
15
X
X
Data Bits
Code
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
DLE
DC1
DC2
DC3
DC4
NAK
SYN
ETB
CAN
EM
SUB
ESC
FS
GS
RS
1F 31 US 16
DVFU
The
D
VFU may be selected in P-Series protocol and is generally used in conjunction with the
Dataproducts interface. A maximum of 12 channels can be assigned to each physical line of a
form--up
to 143 lines. A channel number is assigned to each line on the form. Channel codes
are then sent by the host computer to the printer resulting in rapid paper slewing to the next
corresponding line. The programming sequence is 1) start load code; 2) channel assignments;
and
3) end load code.
The DVFU start load codes are either 6C, 6D, or 6E hex with the P
aper Instruction (PI) Line
high.