Monitoring and Operating the Controller
4
Show Tuning
Prompt
Lower
Display
Lower
Display
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
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.
4.10.2 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). See Subsection 3.11- Control Set Up Group for details on
configuring two local setpoints. 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 3.6 - Accutune Set Up Group for details.
Make sure:
• TUNE has been enabled
• DUPLEX has been configured to Manual, Automatic or Disabled
12/04 UDC3200 Universal Digital Controller Product Manual 111
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