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04/08 UDC3200 Universal Digital Controller Operator Manual 75
4.5.4 Using BLENDED TUNE at start-up for Duplex (Heat/Cool)
When DUPLEX has been configured for DISABLE. This is the preferred selection
for Heat/Cool applications which use a highly insulated chamber (a chamber which
will lose heat very slowly unless a cooling device is applied). Only one local setpoint
(LSP 1) is needed for this selection.
This selection results in performance tuning over the full range utilizing both Heat
and Cool outputs to acquire blended tune values that are then applied to both Heat and
Cool tuning parameters. Both PID sets are set to the same values.
Table 4-7 Procedure for Using BLENDED TUNE at Start-up for Duplex Control
Step Operation Press Result
1
Configure LSP1
Lower
Display
Lower
Display
Lower
Display
Until SP (Local Setpoint 1) shows
in the lower display.
2
or
Until the Setpoint is to the desired
value.
3
Switch to
“Automatic” Mode
Man
Auto
Man
Auto
Man
Auto
Until the “A” indicator is lighted (on
controllers with Manual option).
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.
4.5.5 Using MANUAL TUNE at start-up for Duplex (Heat/Cool)
When DUPLEX has been configured for MANUAL. This selection should be used
when tuning is needed only for the HEAT zone or only for the COOL zone but not
both. If Local Setpoint 1 is used, then the controller will perform a HEAT zone tune.
If Local Setpoint 2 is used, then the controller will perform a COOL zone tune.
Table 4-8 Procedure for Using MANUAL TUNE for Heat side of Duplex Control
Step Operation Press Result
1
Configure LSP1
Lower
Display
Lower
Display
Lower
Display
Until SP (Local Setpoint 1) shows
in the lower display.
2
or
Until LSP1 is a value within the
Heat Zone (output above 50%).
3
Switch to
“Automatic” Mode
Man
Auto
Man
Auto
Man
Auto
Until the “A” indicator is lighted (on
controllers with Manual option).