Span - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
15.0
Revision date
2022-11-18
Language
English

The Span logic block provides linear scaling and biasing of an input value using a straight-line interpolation. The Span block creates a linear relationship between the low input/output and high input/output pair. If the Input for the Span block falls between the low and high input, the Output of the Span block is found on the line between the low and high pairs. The reliability associated with the Span block may report Inconsistent inputs for two reasons: Internal math errors (overflow/underflow) and when the Input Range Low equals the value of the Input Range High.

The following table describes the inputs and outputs of the Span logic block.

Table 1. Span Block Inputs and Outputs

Name

Data Type

Exposed for Connection by Default

Description

Default Value

Inputs

Clamp Highest

Boolean

No

Indicates the behavior when the output exceeds the Output Range High.

True

Clamp Lowest

Boolean

No

Indicates the behavior when the output exceeds the Output Range Low.

True

Input

Float

Yes

Indicates the Input value that the block uses to provide linear scaling and biasing using a straight-line interpolation.

0.0

Input Range High

Float

No

Indicates the highest value allowed for an input (that is, the high end of the input range).

100.0

Input Range Low

Float

No

Indicates the lowest value allowed for an input (that is, the low end of the input range).

0.0

Output Range High

Float

No

Indicates the highest value allowed for an output (that is, the high end of the output range).

100.0

Output Range Low

Float

No

Indicates the lowest value allowed for an output (that is, the low end of the output range).

0.0

Outputs

Present Value 1

Float

Yes

Indicates the output of the linear scaling and biasing performed by the block.

0.0

1 This input or output is the Default Element of the block.