Poll Character; Poll Response; Idle Response; One Char Enquiry - Printronix P8000 Series Administrator's Manual

Chapter 4
HOST INTERFACE Menu
Buffer Size in K
This option configures the amount of memory allocated for the serial port
buffer. You may specify between 1 and 16 Kbytes, in 1-Kbyte increments.
The default is 16K.
NOTE: 1. If you select a baud rate that is 19200 or greater, you may want to

Poll Character

This option is for the Series1 protocol. Whenever the printer receives this
character, it sends a response to the host indicating the current state of the
printer (see Series1 protocol). It may be configured from 0 through FF
hexadecimal.

Poll Response

This option is for the Series1 protocol. After receiving a poll character, the
printer will wait the poll response time in milliseconds before sending the
response. It may be configured from 0 through 30.

Idle Response

This option is for the Series1 protocol.
•
Disable (factory default)
•
Enable. The printer will send a response character every two seconds
while the number of valid bytes in the buffer is less than 75 percent of the
buffer size.

One Char Enquiry

The One Char Enquiry mode uses the Poll Character to detect a request from
the host and sends a response back to the host. This option also allows you to
turn on and off this feature.
The Poll Character is removed from the data stream. If the Data Protocol is
set to ETX/ACK, ACK/NAK, or Series 1, One Char Enquiry is automatically
disabled.
104
increase the Buffer Size in K parameter to improve performance.
2. H-Series and OpenPrint HD products have a range of 1 to 256 and
a default of 64K.
Table 9. One Char Enquiry Response Characters
Printer State
Online and Buffer Not Full
Online and Buffer Full
Offline and Buffer Not Full
Offline and Buffer Full
Response (hex)
22
23
20
21