Modbus Read, Write and Override Parameters plus Exception Codes 
396  UDC3500 Universal Digital Controller Product Manual  3/07 
Parameter 
 
Register 
Address 
Data 
Type 
Access  Data Range or 
Enumerated Selection 
Description  ID  Hex  Decimal       
Gate 1 InputA (B 
LT A or B GT A) 
171  40AB  16555  INT  R/W  0 = Input 1 
1 = Input 2 
2 = Input 3 
3 = Input 4 
4 = Input 5 
5 = Loop1PV 
6 = Loop1SP 
7 = CONST K 
8 = Loop 2 PV 
9 = Loop 2 SP 
Gate 1 InputB 
(OR, NOR, AND, 
NAND, X OR, X 
NOR) 
153  4099  16537  INT  R/W  0 = Digital Input 1 
1 = Digital Input 2 
2 = Digital Input 3 
3 = Digital Input 4 
4 = Relay 1 
5 = Relay 2 
6 = Relay 3 
7 = Relay 4 
8 = Relay 5 
9 = Gate Out 1 
10 = Gate Out 2 
11 = Gate Out 3 
12 = Gate Out 4 
13 = Gate Out 5 
14 = FIX ON 
15 = FIX OFF 
16 = MA MODE 
17 = LR SPL1 
18 = ADAPT1 
19 = MA MODE2 
20 = LR SPL2 
21 = ADAPT2 
Gate 1 InputB (B 
LT A or B GT A) 
172  40AC  16556  INT  R/W  0 = Input 1 
1 = Input 2 
2 = Input 3 
3 = Input 4 
4 = Input 5 
5 = Loop1PV 
6 = Loop1SP 
7 = CONST K 
8 = Loop 2 PV 
9 = Loop 2 SP 
Logic Gate1 K 
Constant 
100  4064  16484  INT   R/W  –999.0 to +9999 
Gate 2 InputA 
(OR, NOR, AND, 
NAND, X OR, X 
NOR) 
156  409C  16540  INT  R/W  Same as ID 152