Function Blocks 
8DO Function Block 
Revision 11    HC900 Hybrid Control Designer Function Block Reference Guide  149 
2/07     
8DO Function Block 
Description 
The 8DO label stands for Eight Point Digital Outputs. 
 
 
 
 
This block is part of the 
I/O Blocks categories.  
Function 
Provides write access to any physical digital output. (All read at the same time) It minimizes the number of 
blocks required to configure all of the digital I/O required in the system. It provides a digital status from the 
algorithms and functions to physical logic output hardware. Each block output requires a module and 
channel number during configuration. The output status may be inverted. 
Input 
IN D1
 = Input Status Signal 
IN D2 = Input Status Signal 
IN D3 = Input Status Signal 
IN D4 = Input Status Signal 
IN D5 = Input Status Signal 
IN D6 = Input Status Signal 
IN D7 = Input Status Signal 
IN D8 = Input Status Signal 
 
Output 
FAIL 
= Failed Output Indication - Module Error