Ramp

Ramp (FB)

FUNCTION_BLOCK Ramp

Short description

Limitation of the signal change of an analog input signal Typical application: damping / filtering

Representation

Interfaces

Inputs

Name
Data type
Value range
Initial value
Function

rIn

REAL

Analog value input

Outputs

Name
Data type
Value range
Initial value
Function

rOut

REAL

Analog value output

xRampActive

BOOL

Status - ramp

Setpoints / parameters

Name
Data type
Value range
Initial value
Function

rVariation

REAL

0 …

100

Maximum change per unit of time

tTime

TIME

T#10s

Time unit

rInitValue

REAL

0

Initial value

eInitial

eInit

eInit.InputValue

Selection of the initial value

tInitDelay

TIME

T#5s

Start delay

Function description

General

The analog input signal rIn is continuously monitored for its value changes. If the signal at the analog value output rOut deviates from the input signal, it follows the input signal with the maximum signal change rate.

Setting of the time unit tTime

This setpoint / parameter may only take values >= 0. The maximum signal change rate is formed by the quotient of the setpoints / parameters rVariation and tTime formed (tTime > 0s).

The maximum signal change rate is formed by the quotient of the setpoints / parameters rVariation and task cycle time (tTime = 0s). The maximum signal change rate applies to both positive and negative value changes at the input rIn effective.

Type of initialization eInitial

This setpoint / parameter determines the type of initialization of the analog value input rIn is defined. The initialization is performed once after each CPU restart. The following options are possible:

Type
Initialization value
Note

eInit.InitValue

rInitValue

Configurable initial value

eInit.InputValue

rIn

Input value

eInit.InputValueDelayed

rIn

Delayed input value

The initialization is performed continuously regardless if the setpoint / parameter tTime has the value T#0s.

CODESYS

InOut:

Scope
Name
Type
Initial

Input

rIn

REAL

Input Const

rVariation

REAL

100

Input Const

tTime

TIME

TIME#10s0ms

Input Const

rInitValue

REAL

0

Input Const

eInitial

eInit

eInit.InputValue

Input Const

tInitDelay

TIME

TIME#5s0ms

Output

rOut

REAL

Output

xRampActive

BOOL

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