Honeywell HC900 - BCD Function Block

Function Blocks
BCD Function Block
84 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
BCD Function Block
Description
The BCD label stands for Binary Coded Decimal Translator.
This block is part of the
Auxiliary category.
Function
Accept up to 8 digital inputs in sequence and interprets the ON/OFF status of the first 4 inputs as a BCD
value between 0 and 9 and the second 4 digits as a value between 10 and 80.
Input
D1
= Bit 0 of the BCD lower digit
D2 = Bit 1 of the BCD lower digit
D4 = Bit 2 of the BCD lower digit
D8 = Bit 3 of the BCD lower digit
D10 = Bit 0 of the BCD upper digit
D20 = Bit 1 of the BCD upper digit
D40 = Bit 2 of the BCD upper digit
D80 = Bit 3 of the BCD upper digit
Output
OUT
= Analog output integer in the range of 0 to 99
OUT = (1* (1 if D1 is ON, else 0))+
(2* (1 if D2 is ON, else 0)) +
(4* (1 if D4 is ON, else 0)) +
(8* (1 if D8 is ON, else 0)) +
(10* (1 if D10 is ON, else 0)) +
(20* (1 if D20 is ON, else 0)) +
(40* (1 if D40 is ON, else 0)) +
(80* (1 if D80 is ON, else 0)))
Block properties
Double click on the function block to access the function block properties dialog box.