CHAPTER 7: Operation
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Value Errors:
SYNTAX ERROR.
UNRECOGNIZED RESPONSE.
ILLEGAL CHARACTER.
MAXIMUM STRING LENGTH EXCEEDED.
MAXIMUM LINE LENGTH EXCEEDED.
VALUE OUT OF RANGE.
INVALID.
TRAILING CHARACTERS IGNORED.
NOT SUPPORTED IN THIS RELEASE.
Compatibility Errors:
LU# NOT AVAILABLE.
LU# NOT COMPATIBLE WITH DEVICE TYPE.
LU# NOT PRINTER TYPE.
LU# NOT AUX PRINTER TYPE.
DISPLAY DOES NOT SUPPORT AUXILIARY PRINTER
**CAUTION** (PAGE LENGTH X LINES PER INCH) HAS NON-INTEGER
RESULT; LINE COUNT PER PAGE NOT UPDATED.
Operational Error:
INACTIVITY TIME LIMIT EXCEEDED.
CONNECT REQUEST FAILED.
UNABLE TO READ EEPROM. DEFAULT CHARACTERISTICS ASSUMED.
7.3 Port Test Mode
Port Test Mode uses various port tests and traces which use the following conventions:
• Data from the LinkUp 5294 to the terminal or host is enclosed in square brackets ([ ]).
• Data from the terminal or host to the LinkUp 5294 is displayed without brackets.
• Complete messages, which could consist of only a single character, are separated by a space.
• Data is displayed on the first 23 lines of the screen, with line 24 reserved for messages. If the terminal
supports dual intensity, the first set of 23 data lines are displayed in low intensity. When 23 lines have
been displayed, the second set of 23 lines overwrites the first data in high intensity. By alternating
between high and low intensity, the most recent data is easily located. If the terminal used does not
support dual intensity, all wrapped data is displayed in the same intensity.
• The <SPACE> bar is a toggle which freezes and restarts the display. When the display is frozen, data is
buffered by the LinkUp 5294. If this buffer overflows, a string of asterisks (***) will appear in the
trace data.
• The <Enter> key ends the trace and returns to the Options menu.
• To clear stored trace data, type an asterisk (*).
To access Port Test Mode, establish the connection to the LinkUp 5294 either by direct connection or by
a dial-up line. Answer the
Enter Device Type
prompt with the appropriate response for your terminal
type.