Honeywell HC900 Reference Manual page 124

Function Blocks
CARB Carbon Potential Function Block
PV Adaptive Disable
Tuning
Enable
Tuning Criteria Normal
Fast
Duplex Tuning Disable
(Active for
Algorithm DUPA
Manual
or DUPB on
General Tab with
Cycle Tuning)
Automatic
110
N/A Disables PV Adaptive tune
N/A
This method adapts a tuned
process to changing system
characteristics over time. When the
PV deviates from the SP by a
certain amount for any reason.
See note 3
N/A Very conservative tuning designed
to calculate critically damped tuning
parameter values that produce
minimal overshoot.
More aggressive tuning than
N/A
Norma. Designed to calculate
under damped parameter values
providing faster control to the
setpoint but may have some
overshot.
Disable -Duplex type tuning is
N/A
disabled and simplex type tuning is
used instead.
Manual - Tuning must be initiated
manually for each side. The
current LSP or RSP value is used
as the target SP for the desired
heat or cool side tuning. For the
heat side, the output cycles
between 50 percent and the high
output limit and for the cool side the
output cycles between 50 percent
and the low output limit. Tuning
values are calculated and stored
only for the side tuned.
Heat and Cool tuning are
sequentially performed
automatically. During the operation
of this tuning the target SP used is
the mid point between the high
output limit and 50 percent for the
heat side and the low output limit
and 50 percent for the cool side.
During tuning for each side the
cycling of the output results in the
PV oscillating around the target SP
value. From the data gathered
during the oscillations, tuning
values are calculated and stored for
each side. After tuning on both
sides is completed, the process SP
is returned to the value of the last
SP used prior to the initiation of the
tuning procedure.
HC900 Hybrid Control Designer Function Block Reference Guide
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select.
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select.
Revision 11
2/07