Honeywell HC900 - WTUN Write Tuning Constants Function Block

Function Blocks
WTUN Write Tuning Constants Function Block
432 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
WTUN Write Tuning Constants Function Block
Description
The WTUN label stands for Write Tuning Constants.
This block is part of the
Loops category.
Function
Writes the numerical value of Gain, Rate, and Reset to a Target PID, TPSC, or CARB block without any
operator interaction.
Select the target block number from the specific function block diagram and enter it in the appropriate
field in the “Write Tune Constants” dialog box.
• If EN is ON, then the tuning constants are set to the Gain, Rate, and Reset input values..
ATTENTION
Invalid for block number whose type is other than PID, CARB, or TPSC.
If the target block is in AUTO mode, tuning parameter change will cause a bump in the output.
If any input value is “out-of-range”, no values will be written.
Input
GAIN
= Value for GAIN tuning constant
RSET = Value for RESET tuning constant (Integration time)
RATE =
Value for RATE tuning constant (Derivative time)
EN = Enable command
ATTENTION
The three analog inputs can originate as recipe items or be calculated for adaptive control.