Monitoring and Operating the Controller 
3/07  UDC3500 Universal Digital Controller Product Manual  203 
Changing the Setpoints 
Table 4-7  Procedure for Changing the Local Setpoints 
Step  Operation  Press  Result 
1 
Select the 
Setpoint 
Lower 
Display
 
Until you see: 
Upper Display = PV 
Lower Display = SP or 2SP or 3SP or 4SP (Value) 
2 
Change the 
Value 
or  
To change the Local Setpoint to the value at which you want 
the process maintained. The display “blinks” if you attempt 
to enter setpoint values beyond the high and low limits.. 
3 
Return to PV 
Display 
Lower 
Display
 
To store immediately or will store after 30 seconds. 
 
Switching between setpoints 
You can switch between Local Setpoints or between Local and Remote Setpoints via the 
SP SELECT key. 
 ATTENTION   The REMOTE SETPOINT value cannot be changed at the keyboard. 
 
Table 4-8  Procedure for Switching Between Setpoints 
Step  Operation  Press  Result 
1 
Select the 
Setpoint 
SP Select 
To switch between the four Local Setpoints and/or the 
Remote Setpoint. Whenever the active lo 
 ATTENTION   “KEY ERROR” will appear in the 
 lower display, if: 
•  the remote setpoint or additional local setpoints are not 
configured as a setpoint source 
•  you attempt to change the setpoint while a setpoint ramp 
is enabled, or 
•  if you attempt to change the setpoint with the setpoint 
select function key disabled. 
Appears to the left of the active setpoint