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INPUT/OUTPUT
INSTRUCTIONS
Specify the
conversion of
a
sensor signal
to a
data
value
and
store
it
in
Input Storage.
Programmable
entries specify:
(1)
the
measurement type
(2)
the
number of channels
to
measure
(3)
the
input
voltage
range
(4)
the
Input Storage Location
(5)
the
sensor calibration
constants
used to
convert
the
sensor output to engineering
units
l/O
Instructions also control
analog
outputs
and
dioital
control
Sensor
Control
21X MICROLOGGER OVERVIEW
PROCESS
I
NG
I
N
STRU CTION
S
Perform
calculations
with
values in
Input
Storage.
Results are returned
to
Input
Storage.
Arithmetic, transcendental
and
are
FIGURE
OV2-1. lnstruction Types and Storage Areas
INTERMEDIATE
STORAGE
Provides temporary storage
for
intermediate
calculations
required by the
OUTPUT
PROCESSING
NSTRUCTIONS;
for
example, sums,
OUTPUT PROCESSING
INSTRUCTIONS
Perform
calculations
over time on the
values
updated
in Input
Storage.
Summaries
for
Final
Storage are generated
when a
Program
Control
Instruction sets
the Output
Flag
in
response to time
or
events.
Results may be
redirected
to
Input Storage for
further
processing.
Examples
include
sums,
averages,
ma)dmin,
standard
deviation,
set
high
FINAL
STORAGE
Final results
from OUTPUT
PROCESSING
INSTRUCTIONS are
stored
here for on-line
or
interrogated transfer to e)dernal devices
(Figure
OV5.1-1). The
newest data are stored
over
tn
ov-4
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