Operator`s manual

21X MICROLOGGER OVERVIEW
OV-4
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
I/O Instructions also control analog outputs
and digital control ports.
INPUT STORAGE
Holds the results of measurements or
calculations in user specified locations. The
value in a location is written over each time a
new measurement or calculation stores data to
the locations.
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, max/min, standard deviation,
histograms, etc.
Output Flag set high
FINAL STORAGE
Final results from OUTPUT PROCESSING
INSTRUCTIONS are stored here for on-line or
interrogated transfer to external devices
(Figure OV5.1-1). The newest data are stored
over the oldest in a ring memory.
PROCESSING INSTRUCTIONS
Perform calculations with values in Input
Storage. Results are returned to Input
Storage. Arithmetic, transcendental and
polynomial functions are included.
INTERMEDIATE STORAGE
Provides temporary storage for
intermediate calculations required by the
OUTPUT PROCESSING
INSTRUCTIONS; for example, sums,
cross products, comparative values, etc.
FIGURE OV2-1. Instruction Types and Storage Areas
Sensor
Control