Modbus Read, Write and Override Parameters plus Exception Codes 
Parameter 
Description 
Register 
Address 
Data 
Type 
Access  Data Range or 
Enumerated Selection 
  Hex  Decimal       
Input Algorithm 1 
 
 
† Input source 
selected via ID 
205, 206, 207. 
00CC 204  INT  R/W 
0 = None 
1 = Weighted Average 
(LSP) † 
2 = Feedforward –  
Summer † 
3 = Feedforward – 
Multiplier † 
4 = Unused 
5 = Summer (with ratio and 
bias) † 
6 = Input High Select (with 
ratio and bias) † 
7 = Input low Select (with 
ratio and bias) † 
8 = General Math A  
(sq. rt., mult., div.) † 
9 = General Math B  
(sq. rt., mult.) † 
10 = General Math C 
(mult., div.) † 
11 = General Math D 
(mult.) † 
12 = Carbon A 
13 = Carbon B 
14 = Carbon C 
15 = Carbon D 
16 = Carbon FCC 
17 = Dewpoint 
18 = Oxygen 
Constant K  002D  045  FP  R/W  0.001 to 1000 
Calc High  001F  031  FP  R/W  –999.0 to +9999 
in Engineering Units 
Calc Low  0020  –999.0 to +9999 
in Engineering Units 
032  FP  R/W 
PV Range Low  0036  054  FP  RD  –999.0 to +9999 
in Engineering Units 
PV Range High  0037  055  FP  RD  –999.0 to +9999 
in Engineering Units 
12/04  UDC3200 Universal Digital Controller Product Manual  199