Function Blocks 
CARB Carbon Potential Function Block 
Revision 11    HC900 Hybrid Control Designer Function Block Reference Guide  109 
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ACCUTUNEIII tab 
 
 
 
Table 34 CARB Accutune III tab configuration parameters 
 
 
Properties Group  Parameter  Index #  Parameter Description  Value or Selection 
Accutune III Type  Disabled 
N/A  Disables Accutune III  Click on radio button to 
select. 
 Cycle Tuning 
 
Tuning parameter values are 
derived from the process response 
to the resultant action of causing 
the PV to oscillate about the SP 
value.  See note 1. 
Click on radio button to 
select. 
 SP Tuning 
 
Tuning based on the process 
response to a SP change.  
See note 2 
Click on radio button to 
select. 
SP Tuning 
Direction 
 
(For SP Tuning 
selection) 
UP 
Down 
N/A 
The selection of either UP or 
DOWN results in the SP Change 
value added or subtracted from the 
present SP value. 
Click on radio button to 
select. 
SP Process 
(For SP Tuning 
selection) 
Process Gain 
 
 
 
SPTune 
Change 
16 
 
 
 
57 
Gain identification value for the 
process.  This value is used to 
estimate the size of the initial output 
step for a SP Tune. 
This defines the value of the initial 
output step change that is used as 
the target for process identification. 
Range is 0.10 to 10.0 
Normal value is 1. 
 
 
Range is:  5 to 15 
percent.