Configuration 
4/07  UDC2500 Universal Digital Controller Product Manual  45 
Function Prompt  
Lower Display 
Selection or Range of Setting 
Upper Display 
English  Numeric 
Code 
English  Numeric 
Code 
Parameter  
Definition 
 
DIS  
DISABLE – The current SetPoint is used to 
derive a single set of blended tuning 
parameters.  This tuning is performed over 
the range of the output limits similar to 
Simplex Tuning.  The Tuning Parameters 
derived are placed into both the HEAT and 
COOL tune sets (PID 1 and PID 2). 
AT ERR 
(Read Only) 
304 
 
ACCUTUNE ERROR STATUS—When an 
error is detected in the Accutune process, an 
error prompt will appear 
 
NONE 0 
NONE—No errors occurred during last 
Accutune procedure. 
 
RUN 5 
RUNNING—An Accutune process is still 
active checking process gain, even though 
“TUNE” is not lit. It does not affect keyboard 
operation. 
 
ABRT 4 
CURRENT ACCUTUNE PROCESS 
ABORTED—Caused by one of the following 
conditions: 
  •  changing to manual mode 
  •  digital input detected  
  •  in heat region of output but a cool output 
was calculated, or vice versa. 
 
SP2 6 
SP2—LSP2 not configured or a Setpoint 
other than LSP1 or LSP2 is in use.