Modbus Read, Write and Override Parameters plus Exception Codes 
362  UDC3500 Universal Digital Controller Product Manual  3/07 
Parameter 
 
Register 
Address 
Data 
Type 
Access  Data Range or 
Enumerated Selection 
Description  ID  Hex  Decimal       
Program Recycles  89  0059  89  FP  R/W  0 to 100 
Controller Status 
at Program End 
180  00B4  180  INT  R/W  0 = Last Setpoint and 
Mode 
1 = Manual, Failsafe 
Output 
Program End 
State 
181  00B5  181  INT  R/W  0 = Disable SP  
Program 
1 = Hold at Program 
End 
Power UP  211  40D3  16595  INT  R/W  0 = Abort 
1 = Resume 
2 = Restart 
Reset SP 
Program 
(ToBEGIN) 
179  00B3  179  INT  R/W  0 = Disable 
1 = Via Keypad 
2 = Rerun 
PV Hotstart  226  00E2  226  INT  R/W  0 = Disabled 
1 = Enabled 
Segment #1 
Ramp Time 
57 0039 057  FP  R/W 99.59 (0-99 
Hrs:0-59 Min)  or  
0 to 999 
(Degrees/Minute) 
Segment #1 
 PID SET 
191  40BF  16575  INT  R/W  0 = SET1 
1 = SET2 
2 = SET3 
3 = SET4 
Segment #2 Soak 
Setpoint Value 
58  003A  058  FP  R/W  Within Setpoint Limits 
Segment #2 Soak 
Time 
59 003B 059  FP  R/W 99.59 (0-99 
Hrs:0-59 Min) 
Guaranteed  
Soak ##2 
87  4057  16471  FP  R/W  0 to 99.9 (0 = no soak) 
Segment #2 
 PID SET 
192  40C0  16576  INT  R/W  0 = SET1 
1 = SET2 
2 = SET3 
3 = SET4 
Segment #3 
Ramp Time 
60 003C 060  FP  R/W 99.59 (0-99 
Hrs:0-59 Min)  or  
0 to 999 
(Degrees/Minute) 
Segment #3 
 PID SET 
193  40C1  16577  INT  R/W  0 = SET1 
1 = SET2 
2 = SET3 
3 = SET4