Function Blocks 
RAI Function Block 
Revision 11    HC900 Hybrid Control Designer Function Block Reference Guide  307 
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Enum  Type  Range Low  Range High  EU 
  R 0 3100 F 
  S -18 1704 C 
  S 0 3100 F 
  T -184 371 C 
  T -300 700 F 
  T -129 260 C 
  T -200 500 F 
  W_W26 -20  2320 C 
  W_W26 -4  4200 F 
  W5W26 -18  2316 C 
  W5W26 0  4200 F 
  W5W26 -18  1227 C 
  W5W26 0  2240 F 
Example 
HFigure 80 shows a Function Block Diagram configuration using an RAI function block. 
 
 
 
RAI used for work temperature monitoring. Tag descriptors are used to identify 
the input. A digital tag connected to the fail output can alarm on an open 
sensor. 
Figure 80  RAI function block example