Configuration 
106  UDC3500 Universal Digital Controller Product Manual  3/07 
3.14 Output Set Up Group 
Introduction 
This group deals with various output types in the controller, the Digital Output Status and 
the Current Output operation.  
 
ATTENTION 
If the controller is configured to use the same relay for more than one function, then the 
following priority is used to determine how the relay functions: Control Outputs take 
precedence over Alarms, which in turn take precedence over Time/Events, which in turn 
take precedence over Logic Gate Outputs. For example, if you select the Loop 2 Output 
Algorithm as Time Simplex (which uses Relay 3), enable Alarm 3 (which also uses 
Relay 3) and configure a Logic Gate to use Relay 3, then the instrument will use Relay 
#3 to perform the Time Simplex output and ignore the Alarm and Logic Gate functions. 
The Tuning Group is automatically configured to have two PID sets when a Duplex 
Control Algorithm is selected. 
 
Function Prompts 
Table 3-14 OUTPUT Group Function Prompts 
Function Prompt  
Lower Display 
Selections or  
Range of Setting  
Upper Display 
Parameter  
Definition 
OUT ALG 
 
OUTPUT ALGORITHM—Lets you select the type of 
output you want. Not applicable with Control 
algorithm prompt 3PSTEP. 
Selections are hardware dependent. For example, if 
the controller does not have a relay output, then 
none of the prompts that need a relay output will 
appear. See 
Table 2-6 and Table 2-7 for other 
information about output types. 
 ATTENTION  For all Duplex Output forms, PID heat 
parameters (PID Set 1) apply for controller output 
greater than 50 %; PID cool parameters (PID Set 2) 
apply for controller output less than 50 %. 
 
TIME 
TIME SIMPLEX—This output algorithm uses Relay1 
for Time Proportional Control. Time Proportional 
Output has a resolution of 3.33 milliseconds with an 
adjustable Cycle Time (see Section 
3.4).