For Next Help

Hi Everybody,

Can you give a specific example on how FOR NEXT INSTRUCTION is use or applied in an industrial setting. I know how these particular instruction operates but I cannot relate it on how this one is applied on actual plant or factory operation.

Pls. help me, if you have a specific program as far as FOR NEXT in S7 200 is concern, that would be find if you can share that to me.

set-csg

Set,

Suppose you had a plant that had 10 storage tanks, each with a level sensor with an analog output. Your HMI screen has room for only one level display at a time. Using a For-Next Loop, you can create a routine that reads the value of each tank and displays it for 5 seconds, then moves to the next tank, until all 10 have been displayed. Then the For-Next loop repeats.

For I = 1 to 10,
Display Tank (I)
If Timer (1) >= 5 sec, then Next I

I will leave it up to the students to fill in the details!

Hi Lancie,

Thank you very much your sample that uses For Next.
Belated Happy New Year. May God blessed U.

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