Asynchronous Terminals and Printer Processes Programming Manual

PRINTER PROGRAMMING CONSIDERATIONS
Error Handling
Error Handling
Table 7-2 summarizes the meanings of some of the file-system
errors for a model 5520 printer. Further explanation of some
errors follows.
Table 7-2. 5520 Errors
Error Error
Number Name Meaning
_______________________________________________________________
21 ILLEGAL COUNT Byte count for a write is greater
than the configured record size
for normal print mode, one-half
the configured record size for
expanded print mode, or 1.67 times
the configured record size
(rounded down, maximum 218 bytes)
for condensed print mode. This
error also occurs when the byte
count specified for a DAVFU load
is not an even number or is
greater than 508 bytes (254
lines).
100 DEVICE NOT READY The device is offline, and the ON
LINE button must be pressed.
102 PAPER OUT Either the printer is out of paper
or the bail has not been closed.
The operator must correct the
problem.
104 NO RESPONSE The printer did not return the
FROM DEVICE requested status. Either the
power is off, or there is a
hardware problem.
105 VFU ERROR 1. More than one stop was defined
for channel 0 (top of form), or
2. No stops were defined for one
or more channels, or
3. Bits 12-15 of each word were
not zeros.
7-12 November 1987