Modbus Read, Write and Override Parameters plus Exception Codes 
3/07  UDC3500 Universal Digital Controller Product Manual  357 
Refer to Table 10-9  for the codes to display or change any of the parameters associated 
with the computer setpoint on Loop 2. 
 
Table 10-9  Computer Setpoint Associated Parameters for Loop2 
Parameter 
 
Register Address 
Description  ID 
Hex  Decimal 
Setpoint Limits   7,8  0107, 0108  263, 264 
Local Setpoint #1  39  0127  295 
Local Setpoint #2  53  0135  309 
Local Setpoint #3   116  0174  372 
Local Setpoint #4  112  0170  368 
Local Setpoint Selection  173  01AD  429 
Computer Setpoint Ratio   90  015A  346 
Computer Setpoint Bias   91  015B  347 
Shed Timer Reset    127  017F  383