Siemens SIMATIC STEP 7 V5.2 Getting Started page 99

Programming the Call in Function Block Diagram
If you are programming in Function Block Diagram, select the input area under the
new network and enter the FBD instructions below. To do this, use the FB Blocks
> FB10 Engines in the Program Elements catalog.
Delete the call for FB1 in OB1 (Networks 4 and 5 from Section 5.6 onwards), since
we are now calling FB1 centrally via FB10.
Then save your program and close the block.
If you require additional engine control programs for your automation task; for example, for
gas engines, hydrogen engines, etc., you can program these as multiple instances in the
same way and call them from FB10.
To do this, declare the additional engines as shown in the variable declaration table of FB10
("Engines") and program the call for FB1 in FB10 (multiple instance in the Program
Elements catalog). You can then define the new symbolic names; for example, for the
switch-on and switch-off procedures in the symbol table.
You can find more information under Help > Contents and
then under "Calling References Helps" in the topics "The STL,
FBD, or LAD Language Description".
STEP 7 Getting Started
A5E00171228-01
Programming a Multiple Instance
10-11