5–6
6400 Line Matrix Printers Setup Guide, Cabinet and Pedestal Models
When a framing error occurs, an exclamation point (!) is printed. If 20
successive errors are received, a line feed is added to force printing to occur.
Overrun Error Handling — Overrun error checking is always in effect for
the serial interface.
When a data overrun error occurs, an asterisk (*) is printed. If 20 successive
errors are received, a line feed is added to force printing to occur.
RS–232 and RS–422 Serial Interface Configuration
Your printer is configured at the factory to match the interface you specified.
By using the operator panel, you may verify and change several interface
parameters in order to meet specific application requirements.
Refer to Chapter 4, “Configuration Menus,” for RS–232 and RS–422
parameter descriptions and information on selecting values for the following
parameters:
RS–232 and RS–422:
• Baud Rate (data rate selected from the operator panel)
• Data Bits (7 or 8 Bits)
• Stop Bits (1 or 2 Bits)
• Parity (None, Odd, Even, Mark or Sense)
RS–232 only:
• Data Terminal Ready logic
• Request to Send logic
Some application programs require a unique configuration. If the printer is
not working properly in the configuration you selected, contact an IBM
service representative.
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 a response to
the host indicating the current state of the printer. It may be configured from
0 through 255. The default value is 0.
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