IBM 1403 Printer
Source: SR20-1078 S/360 Operator's Reference Guide
1403
Suggested Restart Procedures for
1403
An 1/0
error
causes an interruption condition. When
unit
check
is
detected
by
the
program, sense information sent from
the
device control
unit
provides more detailed
infonnation
concerning
the
cause
of
the
unit
check. As a result
of
program analysis
of
the
sense information, an
error
message should be made available
to
the
operator
to
indicate
the
condition.
The
following information describes
the
minimum actions
that
should be performed
when
the
program detects unit check.
The actions are related
to
particular sense indications
that
can occur. These
bits
are
analyzed by
the
program.
The
choice
of
action(s)
to
be
taken
by
the
operator
must be
established
at
the
installation.
Intervention Required (Sense Bit 1)
The
printer enters a not·ready condition (Ready light off) because one
of
the
follow·
ing has accurred:
1.
The
1403
Stop
key
is
pressed. (Possible
operator
error).
2.
A mechanical interlock, such as
the
print
unit,
is
open. (Possible
operator
error).
3. A forms check. When
the
Forms-Check light
is
on, paper feed
trouble
has
occurred
or
the
Carriage
Stop
Key has been pressed. (Also,
the
Ready light
is
off). Any jam condition must be corrected and
the
Check-Reset key must
be pressed before the
Start
Key
is
effective. The program should provide an
operator
message and
exit
from this error recovery procedure. The
operator
should
then
perform one
of
the
following:
a.
Correct
the
not-ready condition, accept
the
record, and allow
the
application program
to
proceed
without
further retries
of
the
command,
b. Correct
the
not-ready condition and restart
the
program from a logical
restart point.
The
logical restart
point
should be
detenn
ined
at
the
installation and specified
to
the
operator.
4. End
of
forms. If an end-of-forms has occurred,
the
End-of-Forms light
is
on
and
the
Ready light
is
off.
To
reset
the
printer, press
the
printer
Start
Key.
The
remaining lines
of
the
form are
then
printed under program controL
(Note
that
the
Start
Key
is
pressed only once.)
When a hole
is
then
sensed
in
channel 1
of
the
carriage
tape
(either space
to
or
skip
.!Q
or
.Qy
channel-1),
the
operation
is
tenninated
with both
the
End-of-Fonns and
Forms-Check lights
on
and
the
Ready light off. Printing
does
not
occur for
the
line
at
which
the
channel-l hole
is
sensed. Therefore, a carriage
tape
with a hole punched in
channel 1. should be
on
the
carriage. If
there
is
no hole
in
channel 1, printing contin-
ues even
if
no
forms are in
the
printer (except for Selective
Tape
Listing operations).
If no skip-to-channel-1 command
is
issued, lines are printed (after
the
last fonn) until
the
channel-1 punch
is
sensed.
(For
Selective Tape Listing operation, new tapes should
be
mounted
when
the
end-of-forms indication occurs.)
Page 5-39
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