FB_WtcTimer

FB_WtcTimer 1:

Implements a timer as master for WTC camming.

Syntax:

FUNCTION_BLOCK FB_WtcTimer EXTENDS FB_Base

FB_WtcTimer 2: Properties

Name

Type

Access

Initial value

Description

Name

STRING

Get, Set

<SourceName>

Specifies the name of the class instance.

FB_WtcTimer

ActualTime

LREAL

Get

0.0 [s]

Elapsed time since start of WTC cycle in seconds.

ActualTimeLatched

LREAL

Get

0.0 [s]

Stored time of the last WTC cycle in seconds.

AttachableMdInterface

I_MdComponent

Get

-

Interface to the machine data component.

FirstStart

BOOL

Get

FALSE

WTC is in its first cycle since the last launch.

GuidingValue

LREAL

Get

0.0

Time value as resulting camming master value.

MaxMeasureTime

LREAL

Get

0.0 [s]

Maximum overflow time of the timer.

MaxMeasureTimeFactor

LREAL

Get, Set

1.5

Overflow factor for the set target time.

ProfileStarted

BOOL

Get

FALSE

TRUE if the timer has been started.

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_WtcTimer 3: Methods

Name

Description

Reset()

Resets the error state of the class.

FB_WtcTimer

ProfileStartAck(bAck)

Resets the ProfileStarted feedback signal.

Start(bCommand)

Starts the timer.

FB_Base

SetHMI(ipBase)

General assignment method for an FB_BaseHmi extending class.

Notice This method always fails in the FB_Base implementation. Overwriting is therefore absolutely necessary.

[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_WtcTimer 4: Interfaces

Type

Description

I_Base

Standard interface on FB_Base.

I_WtcTimer

Standard interface on FB_WtcTimer.

I_WtcMaster

General interface of a WTC master axis.

I_TwoTaskInterface

Runtime interface for two PLC tasks.

I_AttachableMdInterface

Interface for containerless machine data components.

I_BaseEmpty

For extension without standard interface.

I_BaseDev

Covers all methods and properties of the base class.

Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT >= v3.1.4024.54 (recommended)
TwinCAT >= v3.1.4024.42 (required)

PC or CX (x64, x86)

Tc3_PlasticBaseApplication (>= v3.12.7.0)