Configuration 
142  UDC3500 Universal Digital Controller Product Manual  3/07 
3.21   Control 2 Set Up Group 
Introduction 
The functions listed in this group deal with how the controller will control the Loop 2 
process including: Number of Tuning Parameter Sets, Setpoint Source, Tracking, Power-
up Recall, Setpoint Limits, Output Direction and Limits, Deadband, and Hysteresis. 
Function Prompts 
Table 3-21 CONTROL2 Group Function Prompts 
Function Prompt  
Lower Display 
Selections or  
Range of Setting  
Upper Display 
Parameter  
Definition 
PV 2 SRC 
 
 
INPUT 1 
INPUT 2  
INPUT 3  
INPUT 4  
INPUT 5 
IN ALG1  
IN ALG2 
PROCESS VARIABLE SOURCE—Selects the 
source of the Process Variable for Loop 2. 
INPUT 1 
INPUT 2  
INPUT 3  
INPUT 4  
INPUT 5 
INPUT ALGORITHM 1  
INPUT ALGORITHM 2 
LINK LPS 
 
LINK LOOPS MODE AND SETPOINT—Link 
together the operation of the two loops. If either loop 
changes mode due to a front panel change, digital 
input action, or failsafe action, then the other loop 
will track that mode and/or local setpoint. 
 
DISABLE  
AUTOMAN 
SP1 
AM+SP1 
DISABLE—Disable. Loops operate independently.  
LINK MODES—Links A/M modes on both loops.  
LINK LSP1—Links Local Setpoint 1 for both loops.  
LINK MODES AND SETPOINTS—Links both 
modes and Local Setpoint 1 for both loops. 
PID SETS 
 
NUMBER OF TUNING PARAMETER SETS—This 
selection lets you choose one or two sets of tuning 
constants (gain, rate, and reset). 
 
1 ONLY 
ONE SET ONLY—Only one set of tuning 
parameters is available. Configure the values for: 
  Gain (proportional band) 
 Rate 
 Reset Time 
  Cycle Time (if time proportional is used) 
 
 
 
 
 
2KEYBD 
TWO SETS KEYBOARD SELECTABLE—Two sets 
of tuning parameters can be configured and can be 
selected at the operator interface or by using the 
Digital Inputs. 
Press 
Lower/Display key until you see PID SET3 or 
PID SET4 then press  or 
 to switch between