Rate Limiter - 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 Rate Limiter logic block controls the rate at which the Output changes with variations in the Input value. If rate limiting is disabled, this block passes the value of the Input to the Output. If rate limiting is enabled, this block limits changes to its Output to an increment determined by the Step Equation. The Rate Limiter block updates every 5 seconds.

Step Equation = Rate Limit x 5/60.0

The Reliability associated with the Latch block always reports as Reliable.

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

Table 1. Rate Limiter Block Inputs and Outputs

Name

Data Type

Exposed for Connection by Default

Description

Default Value

Inputs

Input

Float

Yes

Provides an Analog Value to the block.

0.0

Startup Value

Float

No

Sets the output to this value when the block is enabled.

0.0

Rate Limit

Float

No

Provides an Analog Value used in the step equation. The output is incremented or decremented by this value.

100.0

Units: Change per Minute

Limit Active

Boolean

No

Enables the block to operate when set to True. If Limit Active is False, the output is set to equal the input.

True

Outputs

Present Value 1

Float

Yes

Indicates the output of the block.

0.0

Properties

Active Limit 2

Boolean

N/A

Provides the following behavior:
  • If Limit Active is True, then this value is True if the Present Value does not reach the Input at that execution. This value is False on the execution when the Present Value reaches the Input.
  • If Limit Active is False, then this value remains False.

False

1 This input or output is the Default Element of the block.
2 Appears when simulating or commissioning a controller.