Modbus Read, Write and Override Parameters plus Exception Codes 
414  UDC3500 Universal Digital Controller Product Manual  3/07 
10.7.18  Control Loop 2 
Table 10-27  lists all the register addresses and ranges or selections for the function 
prompts in Set-up Group Control2. 
Table 10-27  Set-up Group – Control2 
Parameter 
 
Register 
Address 
Data 
Type 
Access  Data Range or 
Enumerated Selection 
Description  ID  Hex  Decimal       
PV Source Loop2  133  0185  389  INT  R/W  0 = Input 1  
1 = Input 2 
2 = Input 3 
3 = Input 4 
4 = Input 5 
5 = Input Algorithm 1 
6 = Input Algorithm 2 
7 = None 
Link Modes and Set 
Point 
132 0184  388  INT  R/W 
0 = Disable 
1 = AutoMan 
2 = SP1 
3 = AM + SP1 
Tuning Parameter 
Selection Loop2 
172  01AC  428  INT  R/W  0 = One set only 
1 =  2 sets keyboard 
selected 
2 =  2 sets with PV 
automatic switchover 
3 = 2 sets with setpoint 
(SP) automatic 
switchover 
4 = Four sets Keyboard 
5 = Four sets Auto Switch 
PV 
6 = Four sets Auto Switch 
SP 
Automatic Loop2 
Switchover Value 
PID1 to PID2 (used 
with ID 172 ) 
9  0109  265  FP  R/W  Within the PV Range in 
engineering units 
Automatic Loop2 
Switchover Value 
PID2 to PID3 (used 
with ID 172 ) 
10  010A  266  FP  R/W  Within the PV Range in 
engineering units 
Automatic Loop2 
Switchover Value 
PID3 to PID4 (used 
with ID 172 ) 
11  010B  267  FP  R/W  Within the PV Range in 
engineering units