Modbus Read, Write and Override Parameters plus Exception Codes 
3/07  UDC3500 Universal Digital Controller Product Manual  427 
10.7.22 Maintenance 
Table 10-31  lists all the register addresses and ranges or selections for the function 
parameters in Set-up Group Maintenance. 
Table 10-31  Set-up Group – Maintenance 
Parameter 
 
Register 
Address 
Data 
Type 
Access  Data Range or 
Enumerated Selection 
Description  ID  Hex  Decimal       
Timer 1  219  00DB  219  INT  R/W 
0 = Disable 
1 = Last Reset 
2 = A1S1 
3 = A1S2 
4 = A2S1 
5 = A2S2 
6 = A3S1 
7 = A3S2 
8 = A4S1 
9 = A4S2 
10 = Man Loop 1 
11 = Guaranteed Soak 
12 = Sooting 
13 = DI 1 Closed 
14 = DI 2 Closed 
15 = DI 3 Closed 
16 = DI 4 Closed 
17 = Man Loop 2 
Timer 2  220  00DC  220  INT  R/W  Same as 219 
Timer 3  221  00DD  221  INT  R/W 
Same as 219