Operating instructions

TABLE II.
CONTROL CONSOLE ERROR CONDITIONS
IV- 20
Error Condition
PRIORITY
alarm light
(red)
comes on
PARITY alarm
light (red)
comes on;
if STOP ON
PARITY ALARM switch
is engaged, processor
halts
OVERFLOW alarm light
(red) comes on (no halt
in program)
Possible Cause
Central processor
is in the
manual mode
Alarm condition has occurred
in card reader or card punch
A parity error was detected
in
memory
A parity error was detected
while receiving
information
via the controller selector
A parity error was detected
in paper-tape reader operation
Random parity errors caused by
system room overheating were
detected on information coming
from memory
Capacity of the arithmetic unit
has been exceeded
The A register overflowed on
a
Corrective Action
When ready to go into auto-
matic mode, press RESET
ALARM and the AUTO portion
of the
AUTO/MANUAL switch.
-
See error and restart proced-
ure on equipment concerned.
See run book for recovery or
restart procedures; press
RESET ALARM and START
switches to start processing
if run book so specifies.
Return to nearest rerun point;
press RESET ALARM and
START switches to start
processing
if rurl book so
specifies.
Check paper tape for
damage;
return to nearest rerun point;
press RESET ALARM
and
START switches to start
processing
if run book so
spec
if ie s.
Call service engineer to cor-
rect
air conditioning
Normally this alarm will be
reset by the program;
if not,
check run book for instructions.
ECHO
alarm light (red)
comes on; program stops
shift
-left instruction
An illegal division was attempted
A peripheral controller that
is
operating through the controller
selector was unable to respond
when addressed; this pertains
to every peripheral which has
a controller. Off line, addressed
plug not installed; power off;
malfunction
Check peripheral for oper-
ator's error