Function blocks
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MN05013005E
165
Data block comparator
EZD provides 32 function blocks BC01 to BC32 for comparing
values of two consistent marker ranges. The comparison is in
byte format. The following marker types can be compared:
• MB,
• MW,
• MD.
The function block is enabled in the circuit diagram.
Figure 98: EZD circuit diagram with enabling of data block
comparator function block
Parameter display and parameter set for a data block
comparator:
Only constants can be modified in the parameter display of a
function block.
According to the operands at the inputs
>I1
and
>I2
the
following operating modes are possible:
Inputs
The function block inputs
>I1, >I2
and
>NO
can have
the following operands:
I 05--------------------------Ä BC27EN
BC27E1o
BC27E2s
BC27E3j-----------------------Ä M 48
BC27EQ-BC27EN-----------------Ä M 49
BC27 +
>I1
>I2
>NO
BC27
Data block comparator function block number 27
+
Appears in the parameter display
>I1
Start of comparison range 1
>I2
Start of comparison range 2
>NO
Number of elements to be compared in bytes per range.
Value range 1 to + 383