Function Blocks 
DO Function Block 
Revision 11    HC900 Hybrid Control Designer Function Block Reference Guide  147 
2/07     
Configuration parameters 
Table 45  Digital output configuration parameters 
 
Properties Group  Parameter  Index #  Parameter Description  Value or Selection 
Rack 
Rack Address of selected I/O 
Module 
From 1 to 5 
Address 
I/O Module 
N/A 
Address of select I/O Module  From 1 to 12 
 Channel 
 
Channel on selected I/O Module 
From 1 to 32 
depending on the 
physical module type
DC = 16 or 32 
AC = 8 
Relay = 4 
Failsafe Failsafe ON 
N/A 
set the output of the block to OFF 
when failure is detected. 
Click on radio button 
to select. 
 Failsafe OFF 
N/A 
set the output of the block to ON 
when failure is detected. 
Click on radio button 
to select. 
 
Failsafe 
HOLD 
N/A 
hold the output at the last value just 
prior to the failure being detected. 
Click on radio button 
to select. 
 
 
 
 
1 
If INVERT is selected, Invert IN before writing to output 
The slash will be present in the COIL symbol only when the 
invert box is selected on the dialog box. (See below.)