StopWatch (FB)

FUNCTION_BLOCK StopWatch

Short description

Measurement of time periods with reset option.

Display of the total time (tElapsed) and the total time before the last measurement (tMeasured).

Portrayal

Interfaces

Inputs

Name	Datatype	Range	Init-Value	Function
xEn	BOOL			Enable measurement
xReset	BOOL			Reset stopwatch

Outputs

Name	Datatype	Range	Init-Value	Function
tMeasured	TIME	0 .. 10 Days	0 Days	Measured time before the last measurement
tElapsed	TIME	0 .. 10 Days	0 Days	Time measured since the last reset

Functional description

General

This function block is used to measure individual time periods (xEn = = 1).

The sum of the measured time periods is displayed at output tElapsed.

The sum of the measured time periods before the last measurement is displayed at the output tMeasured.

The sum of the measured time periods may not exceed 14400 minutes (= 10 days).

The input xReset (xReset*= 1) resets the outputs *tEleapsed*and *tMeasured to 0 regardless of the other states.

If the measurement is not enabled ( xEn*= 0), the outputs *tEleapsed*and *tMeasured are not changed.

Visualization

Information

Element	Authors	Date	Version	Note
Function	Adam Bartod	01.2017	1.0	Initial version
Programming	Adam Bartod	01.2017	1.0	Initial version
Test	Jochen Reu	02.2017	1.0	Initial version
Documentation	Jochen Reu	06.2017	1.0	Initial version
Revision	Lukas Pfänder	10.2017	1.0	Documentation

Codesys

InOut:

Scope	Name	Type	Comment
Input	xEn	BOOL	Enable measurement
	xReset	BOOL	Reset stopwatch
Output	tMeasured	TIME	Measured time before the last measurement
	tElapsed	TIME	Time measured since the last reset