Automatic control function programming manual ladder language

General Purpose Functions
6.3 BCD —> Binary Conversion bcd_bin
Syntax
bdc_bin (BCD_code)
Code: Operand or numerical expression in BCD code.
Operation
The operand, considered as signed, is extended on 32 bits before being placed in the stack. Conversion can only be
performed on an operand in which each half-byte does not exceed the value 9 (in BCD code). If an error is detected,
the function returns -1.
Example:
%V0L.= bcd_bin(%V4.L)
%V4.L contains the value 12345678 in BCD code.
Memory representation of %V4.L: 0001-0010-0011-0100-0101-0110-0111-1000
1 2 3 4 5 6 7 8
12345678 = = 0xBC614E
Memory representation of %V0.L: 0000-0000-1011-1100-0110-0001-0100-1110
0 0 B C 6 1 4 E
! CAUTION
When the BCD operand is on 8 or 16 bits and the last half-byte is > 8, it is necessary to
mask the parameter with the value 0xFF or 0xFFFF so as not to propagate the sign bit.
Example: bcd_bin(%V0.B & 0xFF) ; bcd_bin(%V0.W & 0xFFFF)
Return Code
If OK
Conversion result
Error
-1: operand not in BCD code, one of the half-bytes > 9.
en-938846/7 6 - 5
6