SEMA  | 
    
     
       
     
     		  
     
      
     
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IEC / CEI 1131-3 Compliant

This function block implement a semaphore function. Normally this function is used to syncronize events. The BUSY output is activated by a TRUE condition on the CLAIM input and it is de-asserted by a TRUE condition on the RELEASE input.
Net plugs
Plug  | 
Description  | 
CLAIM  | 
The CLAIM input  | 
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RELEASE  | 
The RELEASE input  | 
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BUSY  | 
The BUSY output  |