FB_ALY_MovingIntervalCounter_1Ch

The Moving Interval Counter 1Ch counts the amount of raised events within a configured interval. An event is raised when the signal of the input channel passes the configured edge at a specific threshold. The calculation restarts when the time of the interval has elapsed.

Syntax

Definition:

FUNCTION_BLOCK FB_ALY_MovingIntervalCounter_1Ch 
VAR_INPUT
    bPersistent: BOOL;
END_VAR 
VAR_OUTPUT 
    ipResultMessage: Tc3_EventLogger.I_TcMessage; 
    bError: BOOL; 
    bNewResult: BOOL; 
    bConfigured: BOOL;
    bEdge: BOOL;
    bLimited: BOOL; 
    nCountsInInterval: ULINT;
    fbTimeFirstCount: FB_ALY_DateTime;
    fbTimeLastCount: FB_ALY_DateTime;
END_VAR

Inputs

Name	Type	Description
bPersistent	BOOL	If the value is `TRUE`, the internal data is stored persistently.

Outputs

Name	Type	Description
ipResultMessage	I_TcMessage	Contains more detailed information on the current return value. This special interface pointer is internally secured so that it is always valid/assigned.
bError	BOOL	This output is `TRUE` if an error occurs.
bNewResult	BOOL	When a new result has been calculated, the output is `TRUE.`
bConfigured	BOOL	Displays `TRUE` when the function block is successfully configured.
bEdge	BOOL	`TRUE` at the time the event is triggered, otherwise `FALSE`.
bLimited	BOOL	`TRUE` if the number of edges in the current interval exceeds the set Count Limit.
nCountsInInterval	ULINT	Number of triggered events in the current interval.
fbTimeFirstCount	FB_ALY_DateTime	Timestamp of the first event in the current interval.
fbTimeLastCount	FB_ALY_DateTime	Timestamp of the last event in the current interval.

Methods

Name	Definition location	Description
Call()	Local	Method for calculating the outputs for a specific configuration.
Configure()	Local	General configuration of the algorithm with its parameterized conditions.
ConfigureChannel()	Local	Channel-specific configuration for the respective algorithm.
Reset()	Local	Resets all internal states or the calculations performed so far.
SetChannelValue()	Local	Method for passing values to the algorithm.

Properties

Name	Type	Access	Definition location	Initial value	Description
fTolerance	LREAL	Get, Set	Local	0.0	Tolerance value for the Equal / NotEqual comparisons

Sample

VAR
    fbMovingIntervalCounter : FB_ALY_MovingIntervalCounter_1Ch;
    fbSystemTime : FB_ALY_GetSystemTime;
    stThresholdEdge : ST_ALY_Threshold;
    tInterval : LTIME := LTIME#20S; 
    nCountLimit : UDINT := 20;
    bConfigure : BOOL := TRUE;
    nInput : INT;
END_VAR

// Configure algorithm
IF bConfigure THEN
    bConfigure := FALSE;
    
    stThresholdEdge.eComparisonOperator := E_ALY_ComparisonOperator.Equals; 
    stThresholdEdge.fThreshold := 1;

    fbMovingIntervalCounter.ConfigureChannel(stThresholdEdge);
    fbMovingIntervalCounter.Configure(tInterval, nCountLimit);
END_IF

// Get current system time
fbSystemTime.Call();

// Call algorithm
fbMovingIntervalCounter.SetChannelValue(nInput);
fbMovingIntervalCounter.Call(fbSystemTime.tSystemTime);

Requirements

Development environment	Target platform	Plc libraries to include
TwinCAT v3.1.4024.0	PC or CX (x64, x86)	Tc3_Analytics

Further Information