Honeywell HC900 - LSEL Low Selector Function Block; Figure 47 LSEL Function Block Example

Function Blocks
LSEL Low Selector Function Block
186 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
LSEL Low Selector Function Block
Description
The LSEL label stands for Low Selector.
This block is part of the
Signal Selectors category.
Function
Selects lower of two analog input values (X & Y) for output.
Indicates when Y is lower than X.
• If X < or = Y, then: OUT = X; YLO = OFF.
• If X > Y, then: OUT = Y; YLO = ON.
Input
X
= Analog value
Y = Analog value
Output
OUT
= Lower analog value
YLO = Digital signal (ON when Y<X)
Block properties
Double click on the function block to access the function block properties dialog box.
Example
HFigure 47 shows a Function Block Diagram using an LSEL function block to monitor two analog inputs to
activate an alarm signal tag.
Figure 47 LSEL function block example