Siemens   6DD1606-2AC0  !!!  --- sales3@amikon.cn  

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Execution of the user program begins with one or more optional start-up organization blocks (OBs) which are executed once upon entering RUN mode, followed by one or more program cycle OBs which are executed cyclically. An OB can also be associated with an interrupt event, which can be either a standard event or an error event, and executes whenever the corresponding standard or error event occurs. 

Siemens   6DD1606-2AC0

6DD1606-2AC0| Siemens | PLC Module

         sales3@amikon.cn  

A function (FC) or a function block (FB) is a block of program code that can be called from an OB or from another FC or FB, down to the following nesting depths:

● 16 from the program cycle or startup OB 

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