Printronix P9000 Series Start Load Code 6D Hex, LPI Byte, Dle, DC1 DC2 DC3 DC4 NAK SYN ETB Can

Table 5-6. P-Series DVFU Line Slewing

	ASCII						Data Bits					Lines Slewed
Hex	Dec	Code	PI	8	7	6	5	4	3	2	1
10	16	DLE	1	X	X	X	1	0	0	0	0	0 = CR*
11	17	DC1	1	X	X	X	1	0	0	0	1	1
12	18	DC2	1	X	X	X	1	0	0	1	0	2
13	19	DC3	1	X	X	X	1	0	0	1	1	3
14	20	DC4	1	X	X	X	1	0	1	0	0	4
15	21	NAK	1	X	X	X	1	0	1	0	1	5
16	22	SYN	1	X	X	X	1	0	1	1	0	6
17	23	ETB	1	X	X	X	1	0	1	1	1	7
18	24	CAN	1	X	X	X	1	1	0	0	0	8
19	25	EM	1	X	X	X 1 1 0 0 1						9
1A	26	SUB	1	X	X	X	1	1	0	1	0	10
1B	27	ESC	1	X	X	X	1	1	0	1	1	11
1C	28	FS	1	X	X	X 1 1 1 0 0						12
1D	29	GS	1	X	X	X	1	1	1	0	1	13
1E	30	RS	1	X	0	0	1	1	1	1	0	14
1F	31	US	1	X	0	0	1	1	1	1	1	15
X = Undefined, 0 or 1						1 = High						0 = Low

*treated as CR = CR; refer to the Carriage Return control code on page 6-16.

NVFU

The NVFU may be selected in P-Series protocol. A maximum of 13 channels can be assigned to a form up to 256 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) LPI byte; 3) channel assignments; and 4) end load code.

Start Load Code - 6D Hex

The NVFU start load code is 6D hex with the Paper Instruction (PI) Line high. After the LPI byte, subsequent data received is channel assignment data until the end load code is received.

LPI Byte

The first byte received after the start load code must be the Lines Per Inch, LPI byte, not a chanF nel assignment byte. Bit 5 of the LPI byte determines the line spacing for the form. If bit 5 of the LPI byte is high (1), line spacing is set to 8 lpi; otherwise, the line spacing is set to 6 lpi. The channel number of the LPI byte is ignored (it is not a channel assignment byte), but the byte is counted as one of the total line bytes.

5-10 Vertical Format Units