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Chapter
5
PC Parallel Interface
One Char Enquiry
When enabled, and the IGP feature is available, a status byte is sent back to
the host when the poll character or the command SFCC enquiry is sent to the
printer (serial interface only). The poll character is received and the status
byte is sent whether the printer is online or offline. The SFCC enquiry will only
be processed when the printer is online.
Poll Character
This option is used when One Char Enquiry is enabled and the IGP feature is
available. Whenever the printer receives this character, it sends aresponse to
the host indicating the current state of the printer. It may be configured from 0
through 255. The default value is 0.
PC Parallel Interface
The PC Parallel interface (also referred to as the "Centronics" interface)
enables the printer to operate with controllers designed for buffered PC
Parallel printers. The length of the data cable from the host computer to the
printer must not exceed 15 feet (5 meters).
NOTE: For a more detailed reliable data transfer, a maximum cable length of
Table 8. Printer PC Parallel Interface Connector Pin Assignments
Input Signals
Signal
DATA LINE 1
Return
DATA LINE 2
Return
DATA LINE 3
Return
DATA LINE 4
Return
DATA LINE 5
Return
DATA LINE 6
Return
DATA LINE 7
Return
DATA LINE 8
Return
254
six feet is recommended.
Output Signals
Pin
Signal
2
ACKNOWLEDGE
20
Return
3
ONLINE/SELECT
21
FAULT
4
FAULT
22
Return
5
PAPER EMPTY
23
Return
6
BUSY
24
Return
7
NAUTO FEED
25
8
NINIT (PRIME)
26
9
NOT
27
DATAPRODUCTS*
Miscellaneous
Pin
Signal
10
CHASSIS GROUND
28
13
GROUND (GND)
32
32
(NC)
29
12
30
11
29
14
31
35
Pin
17
16, 30
34
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