Table of Contents
Advertisement
APPENDIX
ASCII:
for
American Standard
Code fo
I
nformation Interchange
"askee"). A specific binary
code of 28
characters represented by 7 bit
binary
BAUD
RATE: The
speed of
transmission of
informatibn across a
serial interface,
express{d
in units
of bits per second. For
examplef 9600
baud refers to bits being
transmittpd (or received) from one piece of
equipmefrt to
another at a rate of 9600 bits
per
secofrd. Thus,
a 7 bit ASCII
character
plus parify bit plus
1
stop bit (total
9
bits)
would
bd
transmitted in 9i9600 s€c.
=
.94ms
od
about 1000 characters/sec. When
communicating
via a serial interface, the
baud ratp
settings
of
two pieces of
equipment must match each other.
DATA
POINT:
A data value
which
is
sent to
Final Stdrage as
the result of an Output
InstructiQn. Strings of
data points output at
the
samQ
time make
up
Output Arrays.
INTERVAL:
The
time interval
initiating each
execution of
a
table. The execution
interval will
with the current
24 hour
that the
table is executed at
and every
execution interval
the
The table
will be executed for
the first
at
the
first occurrence of the
interval after
compilation. Any
time
the
is reset the execution interual
is
resyn$hronized. See Section
1.1
for
information
on
the choice of an execution
interval.
EXECUTIO$
TIME:
The time
that
it
actually
takes
thb 21X to execute an instruction or
group
of
instructions.
lf the execution time
of
a pro$ram table exceeds the table's
executidn interual, the program table will be
executed less frequently than programmed.
A.
GLOSSARY
FINAL
STORAGE: That
portion
of memory
allocated for storing Output
Arrays.
Final
Storage may be viewed as
a ring memory,
with
the newest data being written over the
oldest.
Data in
FinalStorage may
be
displayed using
the *7 Mode or sent to
various peripherals (Section 2).
HIGH
RESOLUTION:
A
high resolution data
value has
5
significant digits
and may range
in magnitude
from +.00001 to
*99999.
A
high resolution data
value requires 2 Final
Storage locations (4
bytes). All
Input and
Intermediate Storage locations
are high
resolution. Output to Final Storage defaults
to low resolution; high resolution output
must be specified
by Instruction
78.
INDEXED
INPUT
LOCATION: An
input
location entered as
an instruction parameter
may be indexed by keying "C" before
entering by keying
"A";two dashes
(--)
will
appear
at
the right
of
the
display.
Within
a
loop (lnstruction 87, Section 7), this will
cause
the location to be incremented each
pass through
the
loop.
Indexing is also
used
with Instruction 75 to cause an input
location,
which normally remains constant,
to be incremented with each repetition.
INPUT/OUTPUT INSTRUCTIONS:
Input/Output instructions
are used to initiate
measurements and store
the results
in
lnput Storage
or
to set Digital Control Ports
or Continuous Analog Output channels.
INPUT
STORAGE: That
portion
of memory
allocated
for storing the results of Input and
Processing
instructions. The values
in
Input Storage
can be displayed and altered
from
the *6 Mode.
INSTRUCTION LOCATION
NUMBER:
As
instructions are
entered in
a
program table,
they
are numbered sequentially. The
instruction
location number
is
the number
giving
an instruction's order
in
the program
table.
When programming
a
table,
the
instruction location number and
a P
(e.9.,
04: P00) prompts the user when it
is
time
to
enter
an instruction.
bes
time
A-1
Advertisement
Table of Contents
