Honeywell HC900 - Connecting the HC900 Controller to a PC with the Designer Software

Function Blocks
CMPR Comparison Calculation Function Block
120 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
CMPR Comparison Calculation Function Block
Description
The CMPR label stands for Comparison Calculation.
This block is part of the
Calculations category.
Function
Compares value of X input to value of Y input and turns ON one of three outputs based on this comparison.
• If X input is greater than Y input, then: XGY = ON.
• If X input equals Y input, then: XEY = ON.
• If X input is less than Y input, then: XLY = ON.
Input
X
= First analog value.
Y = Second analog value
Output
XGY
= Digital signal state based on calculation.
XEY = Digital signal state based on calculation.
XLY = Digital signal state based on calculation.
Block properties
Double click on the function block to access the function block properties dialog box.
Example
HFigure 24 shows a Function Block Diagram using a CMPR function block to open a vent if input 1 is
higher than input 2.
Figure 24 CMPR function block example