Statistical - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02
Language
English

The Statistical folder in the control block palette contains blocks that perform statistical functions on multiple inputs producing a single output (with the exception of the Statistics block, which provides multiple location and spread statistic outputs). Statistical blocks perform statistics on input. The number of inputs to a Statistical block depends on the number of inputs supported by the type of statistic. The Logic View allows you to add multiple connections to the output of the block.

Table 1. Statistical Blocks

Type

Description

Inputs (Float) 1

Outputs (Float)1

AVG

Average (Mean Value)

I1

I2

Present Value

MAX

Maximum

I1

I2

Present Value

MIN

Minimum

I1

I2

Present Value

Statistics

Provides descriptive statistics, both the location and spread, for the input data set. Location statistics (average or median) reduce the entire input data set into a single value representing the center or most likely value of the data set. The spread statistics (Minimum Value, Maximum Value, and Standard Deviation) measure dispersion about the location statistic. See Table 2 for information on the inputs, outputs, and properties of the Statistics block.

Table 2. Statistics Block

Name

Data Type

Exposed for Connection by Default

Description

Default Value

Inputs 2

I1

Float

Yes

Provides input to the block.

0.0

I2

Float

Yes

Provides input to the block.

0.0

Minimum Trim Count

Float

No 3

Indicates the minimum number of reliable inputs to be trimmed from each end of a sorted list of reliable inputs. This value ensures that at least some inputs are trimmed even when the Trim Percent would not normally trim that many.

If this input exceeds the number of reliable inputs divided by 2, the input is unreliable and the Reliability of the block is set to Inputs Out Of Range.

0

Trimming

Boolean

No3

Trims the block’s values as follows:

False: No trimming takes place.

True: Specified high and low values are trimmed based on the Trim Percent and Minimum Trim Count.

True

Trim Percent

Float

No3

Indicates the percentage of reliable inputs to be trimmed from each end of the sorted list of reliable inputs. The number of inputs trimmed for both bottom and top of list are always the same. If the calculated number of inputs to be trimmed is less than 1, then only the Minimum Trim Count number of inputs are trimmed.

If this input exceeds 50%, the input is unreliable and the Reliability of the block is set to Inputs Out Of Range.

15.0%

Range: 0-50%

Outputs 4

Average 5

Float

Yes

Indicates the average (arithmetic mean) of the remaining reliable inputs.

0.0

Maximum Value

Float

Yes

Indicates the maximum value of the remaining inputs.

0.0

Median

Float

Yes

Indicates the median value as follows:
  • If the number of remaining inputs is odd, this output is the middle value of the sorted list of remaining inputs.
  • If the number of remaining inputs is even, this output is the average of the two middle values.

0.0

Minimum Value

Float

Yes

Indicates the minimum value of the remaining inputs.

0.0

Standard Deviation

Float

Yes

Indicates the standard deviation of remaining inputs.

1.0

Properties

Interval

Float

N/A3

Equals the time between scheduled executions of the block.

600 seconds

Range: 1-32,767

Use Default if Not Reliable

Boolean

N/A3

Use to specify the behavior when the block goes unreliable. If True, the Outputs are set to their Default Values (user configurable) and their Reliability is set to Reliable. If False, the Outputs maintain the last reliable values and their Reliability is set to the Reliability of the block.

False

1 The inputs and outputs of this block are exposed for connection by default.
2 A minimum of two reliable inputs is required for the statistics block to remain reliable. Unreliable inputs are automatically dropped from all calculations.
3 This property/input only appears in the Details dialog box of the block.
4 Each output of the Statistic block has a user-configurable Default Value. When the block is not reliable, you can configure whether the outputs pass their Default Value or hold their previous values. If the Default Value is passed, the Reliability of all Outputs remains Reliable. If the previous values are held, the Reliability of all Outputs is set to the Reliability of the block.
5 This input or output is the Default Element of the block.