Bc, Data Block Comparator - Eaton easySafety Manual

Standard function blocks
BC, data block comparator The data block comparator function block compares two
186
contiguous marker ranges. For this you define the number of
bytes to be compared. The comparison is carried out in byte
format for marker types MB, MW and MD.
easySafety allows the use of up to 16 data block
comparators.
Function block
BC...
Block Comparator
a EN
DW >I1
b
>I2
DW
c
DW >NO
Figure 75: Data block comparator function block
a Coil BC..EN: Enables the operation of the function block.
b Inputs BC..I1 and BC..I2: The data block corresponding to the
start address specified on input I1 is compared with the data
block corresponding to the start address specified on input I2.
c Input BC..NO: Number of bytes to be compared.
d Contact BC..EQ: Closes when compared blocks are identical.
e Contact BC..E1: Closes when the number of compared
elements for a marker range are exceeded.
f Contact BC..E2: Closes when compared blocks overlap.
g Contact BC..E3: Closes when compared blocks are outside of
the permitted range.
02/16 MN05013001Z EN
d
EQ
E1
e
f
E2
E3 g