Reading scantime S7

[RemcoK]

Does anybody know how too read the scantime from a Siemens S7. I need too make an very fast timer and want too read the scantime for this.

I Mitsubishi it's very easy, but I don't know where I can find this in Siemens S7.

Tanks

Remco

 

[JesperMP]

Simple.
In OB1, load the local data #OB1_PREV_CYCLE and transfer it to an address for further processing (Merkerword or Dataword as an INT).
The value is the cycle time in milliseconds.

 

[RemcoK]

Sometimes the answers are simple.
It saved me a lot off time looking.

Thx.

Remco

 

[USDutchman]

Scan time alternative

For creating youre own timer, you could also use SFC 64.

It is like a rolling counter (0-2147483647 then start again at 0) that counts in mili seconds.