Eaton easy800

5 Function blocks
5.3 BC, data block comparator
Control Relay easy800 11/11 MN04902001Z-EN www.eaton.com 145
Function of the function block
The data block comparator function block compares two contiguous data
blocks.
The comparator is active if coil BC..EN (enable) is triggered.
The error outputs E1, E2 and E3 are evaluated regardless of the status of the
enable.
Example 1:
Comparison of marker blocks, direct definition of marker ranges
Two marker blocks are to be compared. Block 1 starts at MB10, Block 2
starts at MB40. Each block is 5 bytes long.
• Parameters of function block BC01:
The comparison result of the function block BC01 is: BC01EQ = 1, the data
block ranges have the same content.
￫
No data blocks are compared if an error is present.
Memory
48 + per 4 Byte/Constant at function block input
Cycle time [μs]
easy800 standard easy800-SWD
1 Byte
52 18
10 Bytes
60 26
100 Bytes
138 48
• Comparison range 1: I1 MB10
• Comparison range 2: I2 MB40
• Number of bytes: NO 5
Comparison range 1
Value of marker range
1 (decimal)
Comparison range 2 Value of marker range
2 (decimal)
MB10 39 MB40 39
MB11
56 MB41 56
MB12
88 MB42 88
MB13
57 MB43 57
MB14
123 MB44 123