Operating instructions

Corrective Action
Make card punch ready
and
consult run book for restart
procedures
Make card reader ready and
consult run book for
restart
procedures
Read
I register to determine
which peripheral is involved;
refer to section of this
manual
on that peripheral for corrective
act ion
Engage MANUAL switch,
turn off SAVE
P switch (to
UP position) press RESET P,
AUTO, and START switches
Check
ilm intenance panel; if
DEC MODE light is on,
reset
to binary
mode, rerun deck
If any INDEX GROUP lights
are on, reset group to zero
Manually transfer contents of
nleillory locat ion1 indicated by
P counter to the
A register to
deternline if instruction is
legal. If progranlrner error,
return
progranl to originator.
If lliachine error, try to rerun;
if rerun fails, call service
engineer
Restart and try to rerun pro-
gram;
if error recurs, call
service engineer
Error Condition
CARD PUNCH alarm
light (red) comes on;
computer halts.
CARD READER alarm
light (red) comes on;
computer halts.
Central processor hangs
in
a loop and all peripherals
halt.
Program executes same
instruction over and over
again (P counter does
not increment).
When loading
a program
deck of cards, the card
reader reads one or two
cards
and halts; repeats
condition on reruns.
Computer and peripherals
halt
Possible Cause
Card punch
not ready when a
WCB, WCF, or WCD instruction
was given
Card reader not ready when an
RCB, RCF, or RCD instruction
was given (busy, inoperable,
card jam, or feed error)
Program
is branching on a
peripheral ready or not ready
(determined by manually step-
ping through the loop)
SAVE
P switch was left on (in
down position)
Processor may be in
decimal
mode
An index group (other than zero
has been selected
An illegal
conlmand is in I
lllegal command in I is all ones
(a minus
mernory resetter was
used), indicates machine has
jumped out of the program