Step 7 and wincc flex dealing with timer preset help

Hello

I usually represent all my time delay in 0.001sec inside the hmi but know i need to enter values ranging to 2o minutes meaning 1200 000ms!!!

I'm using S5time variable and equivalent timer tags on winccflex for timer preset values

Do someone know a better way of doing this to fix or choose the timer preset base units

If I needed a setpoint on the HMI that would max out at 20 minutes I'd just give them a setpoint in the format xx minutes. Then in the PLC I would take the setpoint in minutes and convert to S5 time. You said you were using S5 timers. I have a function that does this if it interests you:
http://www.plctalk.net/qanda/showpost.php?p=351803&postcount=15

Use the IEC Timeers instead of the S5T timers, they take their input directly in ms and you don't need to worry about BCD or range coding which makes them much easier to feed (more or less) directly from the HMI.

Thanks very nice answers

Thanks to tips from L D[AR2,P#0.0], we are using more of the IEC Timers.

The terrific help on the IEC timers came from L D[AR2,P#0.0] in this thread, specifically post #69:
http://www.plctalk.net/qanda/showthread.php?t=32304&highlight=fc+fb&page=5