Wincc internal Stopwatch

Dear respected engineers

I want to make a production downtime stopwatch without using step7
only by using Wincc.

I have a signal of failure equal true during failure.

I need an output Number on the wincc screen showing the time during stopping

I guess you could do this with VB script, have you looked at that?

thank you Mr Boneless I will check that site

I still have the problem and I didn't found the solution on that site

its appreciated for any help in this issue as I didn't find via internet any wincc internal stopwatch I only got an individual c# code but it didn't work with wincc.

I want to make a production downtime stopwatch without using step7
only by using Wincc.

I have a signal of failure equal true during failure.

I need an output Number on the wincc screen showing the time during stopping

There is more than one way you can do it.

If you want to keep the history of the events, I'd use the WinCC alarm logging functionality. Set an alarm when the event comes, and set it back when it goes. You can use also internal tags for alarm trigger, or just create an event message manually via script function. In the alarm control you can see when the event came in, and the duration of the event. You can append additional values (or text messages) to the event.

Another solution could be, to use two interval variables to save the current time as unix-timestamp (signed 32 bit). When event comes, use standard time() function from time.h, and save the starting-time to internal-timestamp1. The time (duration) the event is on, is the difference from the current result of time() to the start-time you've saved before..
When the event goes, save the timestamp to internal-timestamp2, and you can show the user how long the last event was on, by subtracting the two values.
If you want, you can recalculate the localtime from the timestamps you've stored, so the user would see the date/time and not the seconds from the unixtime.

thanx for interst Mr Thomas :

if it possible for you to send me a way for showing the second method that you send with c# code or visual basic and detailed steps it will be a pleasure for me as I'm a wincc beginner

Example of a stopwatch on internal variables, start and stop is done by a button

Internal variables:
- StopwatchRunning: bool
- StopwatchStarttime: signed 32-Bit integer
- StopwatchStoptime: signed 32-Bit integer

Place a button which starts / stops the stopwatch:
Place two IO-Fields which display the start and the stoptime. Use data format "String".
Add on Attribute "Outputvalue" a C-Script, triggered by StopwatchStarttime / StopwatchStoptime:
If you need a different display format for the datetime, you can use your own format function instead of using asctime. You'll find lots of information about datetime formatting in C, as this is nothing special for WinCC.

If you need the actual runtime in seconds, add another IO-field with data format "Decimal" and the following C-script: