Monitoring and Operating the Controller 
Prompt  Description 
TC2 FAIL 
Thermocouple on Input 2 is in imminent danger of burning out. 
OUT1FAIL 
Current Output is less than 3.5 mA. 
OUT2FAIL 
Current Output 2 is less than 3.5 mA. 
 
IN 1
 
Ratio 
 
Bias
 
•
 
•
 
IN 2
 
  
Ratio 
 
  
Bias
 
  
•
 
•
 
1 2
 
PV 
Source
IN 2
 
RSP 
 
Source
 
INPUT A
 
  
INPUT B
 
  
INPUT C
 
  
INPUT 
ALGORITHM 1
FEEDFORWARD 
INPUT A ONLY
To RSP
SP 
 
Source
 
SP
 
PV
Remote SP
 
Local SP
 
LSP1
 
LSP2
 
LSP3
 
To RSP
 
•
 
To RSP
 
  
CONTROL 
ALGORITHM 
OUTPUT
FEEDFO RWARD 
SUMMER OR 
MULTIPLIER
Manual Mode 
Output
 
To Final 
Control 
Element
In Alg1
 
Input 1
 
Input 2
Output 1
Input 1
Input 2
Output 1
Input 1
Input 2
Output 1
 
Figure 4-2  Functional Overview Block Diagram of the UDC3200 Controller   
 
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