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BC, data block comparator
193
02/16 MN05013001Z EN
Example 3: Comparison of marker blocks, definition
of a marker range in a different format.
Two marker blocks are to be compared. Block 1 starts at
MB60, Block 2 starts at MD80. Each block is 6 bytes long.
• Parameters of function block BC01:
– Comparison range 1: >I1 MB60
– Comparison range 2: >I2 MD80
– Number of bytes:
>NO 6
The data block ranges do not have the same content.
BC01EQ = 0, MB65 and MD81 (Byte 2) are not identical.
h
The comparison is in byte format. MD80 has 4 bytes.
Therefore the first two bytes of MD81 are also compared.
Compar-
ison range
1
Value of
marker range 1
(decimal/
binary)
Compar-
ison range 2
Value of marker range 2 (decimal/
binary)
MB60
45/
00101101
MD80 (Byte
1, LSB)
1097219629/
010000010110011000111110
00101101
MB61
62/
00111110
MD80
(Byte 2)
1097219629/
0100000101100110
00111110
00101101
MB62
102/
01100110
MD80
(Byte 3)
1097219629/
01000001
01100110
0011111000101101
MB63
65/
01000001
MD80
(Byte 4, MSB)
1097219629/
01000001
011001100011111000101101
MB64
173/
10101101
MD81
(Byte 1, LSB)
15277/
00111011
10101101
MB65
59/
00111011
MD81
(Byte 2)
15277/
00001000
10101101
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