Function Blocks 
SW Analog Switch Function Block 
378    HC900 Hybrid Control Designer Function Block Reference Guide  Revision 11 
  2/07 
SW Analog Switch Function Block 
Description 
The SW label stands for Analog Switch.  
 
 
 
This block is part of the 
Signal Selectors category.  
Function 
Selects input Y for output when digital input signal (SY) is ON. 
•  If SY = ON, then; OUT = Y 
•  Otherwise, OUT = X 
Input 
X
 = First analog value 
Y = Second analog value 
SY = Where ON selects Y command digital signal. 
Output 
OUT
 = Selected value 
Block properties 
Double click on the function block to access the function block properties dialog box.