Campbell Scientific CR9000X Measurement and Control System User Manual

Page 203

Section 6. Data Table Declarations and Output Processing Instructions

that the value of BinSelect was within Bin 4's range 30 percent of the time of
the Data Table's output rate. In reality, it is only 1/2 of that (15% of the time)
because 50% of the time, none of the bin's values are being incremented.

The difference between the closed and open form is shown in the following
example for temperature values:

Lower range limit

° C

Upper range limit

° C

Number of bins

Closed Form

Open Form

Range of first bin

10 to <12

° <

Range of last bin

28 to <30

° >

Parameter
& Data Type

Enter

HISTOGRAM PARAMETERS

BinSelect
Variable or
Array

The variable that is tested to determine which bin is selected. The histogram 4D instruction requires an
array dimensioned with at least as many elements as histogram dimensions.

DataType

A code to select the data storage format. Read More: See Section 4.2.4.4 Data Types

Constant

Alpha Code

Numeric Code

Data Format

IEEE4

IEEE 4 byte floating point

FP2

Campbell Scientific 2 byte floating point

UINT2

2 Byte unsigned integer

Long

4 Byte Integer value

DisableVar

Constant,
Variable, or
Expression

A non-zero value will disable intermediate processing. Normally 0 is entered so all inputs are processed.
For example, when the disable variable is

≠0 the current input is not included in the histogram. The

histogram that is eventually stored includes the inputs that occurred while the disable variable was 0. The
Disable variable can be used to remove NANs from the results of the histogram (use "BinSelect = NAN"
for the DisableVar expression).

Special use case: Set equal to 12345 and the histogram will reset after it outputs.

Set equal to -12345 and the histogram will reset immediately.

Value Result

Process current input

≠ 0

Do not process current input

Bins

Constant

The number of bins or subranges to include in the histogram bin select range. The width of each
subrange is equal to the bin select range (UpLim - LowLim) divided by the number of bins.

Form

Constant

The Form argument is 3 digits - ABC

Code Form

A = 0

Reset histogram after each output.

A = 1

Do not reset histogram.

See DisableVar for
override function

B = 0

Divide bins by total count.

B = 1

Output total in each bin.

C = 0

Open form. Include outside range values in end bins.

C = 1

Closed form. Exclude values outside range.

101 means: Do not reset. Divide bins by total count. Closed form.

WtVal

Constant or
Variable

The variable name of the weighted value. Enter a constant for a frequency distribution of the BinSelect
value.

LowLim

Constant

The lower limit of the range covered by the bin select value.

UpLim

Constant

The upper limit of the range of the bin select value.

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