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04/08 UDC3200 Universal Digital Controller Operator Manual 73
5
Initiate Tuning
Select “DO SLOW” or “DO FAST”
in lower display.
6
Tuning in operation
Lower
Display
Lower
Display
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.
4.5.2 Tune for Duplex (Heat/Cool)
Accutune for applications using Duplex (Heat/Cool) control.
The controller must be configured to have two local setpoints unless Blended Tuning
is desired (see below). During tuning, the Accutune III process assumes that Local
Setpoint 1 will cause a Heating demand (output above 50%), and the tuning
parameters calculated for that setpoint are automatically entered as PID SET 1.
Likewise, Accutune III assumes that Local Setpoint 2 will cause a Cooling demand
(output less than 50%), and the tuning parameters calculated for that setpoint are
automatically entered as PID SET 2.
Configuration Check for Duplex
See Subsection 3.5 - Accutune Set Up Group for details.
Make sure:
• TUNE has been enabled
• DUPLEX has been configured to Manual, Automatic or Disabled