Modbus Read, Write and Override Parameters plus Exception Codes 
3/07  UDC3500 Universal Digital Controller Product Manual  413 
Parameter 
 
Register 
Address 
Data 
Type 
Access  Data Range or 
Enumerated Selection 
Description  ID  Hex  Decimal       
Output Deadband for 
Time Duplex 
18  0012  018  FP  R/W  –5 to +25.0% 
Output Deadband for 
TPSC 
76  004C  076  FP  R/W  0.5 to 5.0% 
Output Drop Off 
Limit 
20  0014  020  FP  R/W  –5 to 105% 
Output Hysteresis  19  0013  019  FP  R/W  0.0 to 100.0% of PV 
Failsafe Mode  213  00D5  213  INT  R/W  0 = Latching 
1 = Non latching 
Failsafe Output 
Level 
40  0028  040  FP  R/W  0 to 100% 
TPSC Power Output  183  00B7  183  INT  R/W  0 = Last 
1 = Failsafe 
TPSC Failsafe 
Output 
184  00B8  184  INT  R/W  0 = Motor goes to closed 
position (0%) 
1 = Motor goes to open 
position (100%) 
Manual Output  113  0071  113  FP  R/W  0 to 100% 
Automatic Output  114  0072  114  FP  R/W  0 to 100% 
Proportional Band 
Units 
148  0094  148  INT  R/W  0 = Gain 
1 = Proportional band 
Reset Units  149  0095  149  INT  R/W  0 = Minutes 
1 = RPM