FB_ParisonLengthControl

FB_ParisonLengthControl 1:

Implements parison length control in the typical use case of the blow molding process.

Syntax:

FUNCTION_BLOCK FB_ParisonLengthControl EXTENDS FB_Base

FB_ParisonLengthControl 2: Properties

Name

Type

Access

Initial value

Description

Name

STRING

Get, Set

<SourceName>

Specifies the name of the class instance.

FB_ParisonLengthControl

InputPhotocell

I_InputBase

Set

FALSE

Input element (FB_InputDigital) for the photocell

TurnrateDown

BOOL

Get

FALSE

Control output for lowering the turn rate

TurnrateUp

BOOL

Get

FALSE

Control output for raising the turn rate

WtcStart

BOOL

Get, Set

FALSE

Input signal for the start of a new cycle

Photocell

BOOL

Set

FALSE

Input for the signal of the photocell

Alternative: InputPhotocell

FB_Base

BaseState

E_BaseState

Get

eNotHandled

Initialization state of the class instance.

Error

BOOL

Get

FALSE

Class is in an error state.

ResultMessage

I_AppMessage

Get

-

Access to the class-internal EventLogger.

[PROTECTED] _Name

STRING

Get

<SourceName>

.Name without leading 'fb'.

FB_ParisonLengthControl 3: Methods

Name

Description

Reset()

Resets the error state of the class.

FB_ParisonLengthControl

Activate()

Activates the parison length control.

FB_Base

GetHMI()

Returns the assigned HMI object.

Notice The method is not implemented in the FB_Base class. If the method is not overwritten by inheritance, a pseudo variable is always returned.

SetHMI(ipBase)

General assignment method for an FB_BaseHmi extending class as a local HMI.

Notice The method is not implemented in the FB_Base class. If the method is not overridden by inheritance, it always fails.

[PROTECTED] _IsMyself(iCmp)

Identifies whether the transferred object corresponds to its own instance.

[PROTECTED] _QueryNamespace()

Extracts the first part of the instance path as an object namespace.

[PROTECTED] _QueryObjectName()

Extracts the last part of the instance path as the object name.

FB_ParisonLengthControl 4: Interfaces

Type

Description

I_Base

Standard interface on FB_Base.

I_ParisonLengthControl

Standard interface on FB_ParisonLengthControl

I_BaseDev

Covers all methods and properties of the base class.

I_Comparable

Enables comparisons via _IsMyself() or F_IsSameInstance().

Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT 4026 >= v3.1.4026.16
TwinCAT 4024 >= v3.1.4024.66

PC or CX (x64, x86)

Tc3_PlasticBaseApplication (>= v12.12.7.0)