FB_ProportionalGain (Function Block)

Applies a proportional gain to the input error signal.

The output is computed as:

\[y = K_p \cdot e\]

where \(K_p\) is Kp and \(e\) is the error signal set via Input.

Note

The block is FINAL and must be instantiated, not extended. Use FB_init to set fKp at declaration time.

Extends: FB_SisoComponent

Properties

Kp

Type: LREAL

Gets or sets the proportional gain.

A higher value produces a stronger response to error but may cause overshoot. A lower value produces a more gradual response. A value of 0 disables the proportional term entirely.

Methods

FB_init

Inputs

Name	Type	Description
`bInitRetains`	`BOOL`	if TRUE, the retain variables are initialized (warm start / cold start)
`bInCopyCode`	`BOOL`	if TRUE, the instance afterwards gets moved into the copy code (online change)
`fKp`	`LREAL`	Proportional gain.

Reset

Sets the output to zero. Takes effect until the next Run() call.

Run

Computes the proportional output for the current cycle.

Note

Must be called once per cycle on a single PLC task.