User’s Manual
CD3000M-1PH from 125A to 700A
Honeywell
37
www.honeywell.com/imc
START
Setting FFFF (Hex) To CR
CR= CRC error check data (1 word)
I = Digits of calculation characters
in command message
J = Check on the number of times
of CR calculation
Setting 1 to I
Setting 1 to J
CR is shifted by
1 bit to right
Added 1to J
Added 1 to I
END
After shifting CR by 1 bit to right, A001(Hex) and exclusive logical sum
(XOR) are executed for setting the result in CR
Bit at right and of CR is 1?
NO
NO
NO
YES
YES
YES
Eight times of calculation
is completed?
J>8
Calculation of all charactersis completed?
I>All characters numbers
Exclusive logical Sum (XOR) is executed on one character (1 byte) at I
charactor of CR and designated message, and results are set to CR.