Function Blocks 
HOA Hand/Off/Auto Switch Function Block 
174    HC900 Hybrid Control Designer Function Block Reference Guide  Revision 11 
  2/07 
FEEDBACK SIGNAL tab 
The feedback signal is used for display purposes.  
When the HOA block is used in conjunction with a Device Control (DC) block, the feedback is typically 
referenced to the (STI) status output pin of the DC block. The sample text shown in 
HTable 55 would 
correspond to the states of the DC block. 
 
 
 
To select a Feedback signal and to define state text for the enumerated value of the feedback signal, 
proceed with the sequence 1 through 3 below. 
Table 55  HOA feedback signal tab parameters 
 
Sequence  
Number 
Parameter 
Field 
Action Selections Comments 
1 
 
Analog Signal Tag List 
 
Click on a signal 
tag in the list 
Select from all configured 
Analog Signal tags listed 
 
2 
 
Select/Delete Signal 
 
Click “Select”  at 
the bottom of 
the “Analog 
Signal Tag List” 
to place 
highlighted 
signal tag into 
the “Selected 
Signal” field 
 
 
The selection is 
placed in the 
Selected Signal field 
on the dialog box. 
Click on “Delete 
Signal” at the bottom 
of the “Analog Signal 
Tag List” to remove 
a signal tag from 
field.