Monitoring and Operating the Controller 
3/07  UDC3500 Universal Digital Controller Product Manual  207 
4.10.1  Tune for Simplex Outputs 
After “TUNE” has been enabled, you can start Accutune as shown in Table 4-9.   
Table 4-9  Procedure for Starting “TUNE” 
Step  Operation  Press  Result 
1 
Configure LSP1 
Lower 
Display
 
Until SP (Local Setpoint 1) shows 
in the lower display. 
2 
 
or  
Until LSP1 is to the desired value. 
3 
Switch to 
“Automatic” Mode 
Man/Auto 
Until the “A” indicator is lighted (on 
controllers with Manual option). 
4 
Show Tuning 
Prompt 
Lower 
Display
 
Until “TUNE OFF” is shown on 
lower display. 
5 
Initiate Tuning 
 
Select “DO SLOW” or “DO FAST” 
in lower display. 
6 
Tuning in operation 
Lower 
Display
 
Upper display will show a “T” as 
long as ACCUTUNE process is 
operating. When process 
completes, tuning parameters are 
calculated and lower display will 
show “NO TUNE” prompt. 
 
ATTENTION 
The Accutune process may be aborted at any time by changing the lower display back to “NoTUNE” or 
by switching the controller into Manual Mode.