FB_Monitoring

FB_Monitoring 1:

Implements a monitoring function for analog signals. The threshold values for monitoring can be set variably via the HMI object.

Syntax:

FUNCTION_BLOCK FB_Monitoring EXTENDS FB_Base

FB_Monitoring 2: Properties

Name

Type

Access

Initial value

Description

Name

STRING

Get, Set

<SourceName>

Specifies the name of the class instance.

FB_Monitoring

AttachableMdInterface

I_MdComponent

Get

<Local>

Interface to the machine data component

AutoClearAlarms

BOOL

Get, Set

FALSE

Triggered alarms are automatically cleared after the cause has been eliminated.

EnableAlarms

BOOL

Get, Set

FALSE

Falling below/exceeding the limit triggers pre-implemented alarms.

Input

I_InputBase

Get, Set

NULL

Interface of the analog signal to be read

Value

LREAL

Get, Set

0

Returns the scaled analog value. Can be set if no input has been assigned.

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_Monitoring 3: Methods

Name

Description

Reset()

Resets the error state of the class.

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_Monitoring 4: Possible events

ID

Description

Alarm/Message

300x

Exceeding/falling below the set tolerances

Alarm

FB_Monitoring 5: Interfaces

Type

Description

I_Base

Standard interface on FB_Base.

I_Monitoring

Standard interface on FB_Monitoring

I_AttachableMdInterface

Interface for containerless machine data components

I_OneTaskInterface

Runtime interface for a PLC task

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 v3.1.4024.42

PC or CX (x64, x86)

Tc3_PlasticBaseApplication (>= v3.12.6.0)