System function blocks and functions

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These blocks fulfill manifold special tasks like STRING and date process, communication and so on. They are not exported by STEP®7.

 

Most of the system function blocks and -functions are not integrated in TrySim, that means, should the occasion arise, that you have to program them yourself so that the rest of your program works. Before you do this you should ask us whether the blocks needed by you are already programmed by us.

 

In the main register of TrySim there is a subdirectory ‘Special Blocks’. You should copy all special blocks written by you or programmed by us into this subdirectory. Using them they are taken over into the current project automatically.

 

Programmed until now:

SFC 0        

Set the CPU-clock

SFC 1        

Read out the CPU-clock

SFC 20

Copy memory areas

SFC 21

Fill memory areas with a pattern

SFC 22

Create a new DB

SFC 23

Delete a DB

SFC 24

Find out the length of a DB

SFC 64

Read out the system time in ms

 

See also:

IEC-Functions

 

STEP®7 is a registered trademark of the Siemens AG.