Eaton easySafety, Manual

Page: 188 / 695

Standard function blocks
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02/16 MN05013001Z EN
• Constant.
• Markers MD, MW, MB.
• Output
…
QV> of a different function block.
Output
The output provides the calculation result as an integer.
You can assign the following operands to output
…
QV>:
• Markers MD, MW, MB and DWord inputs of other function
blocks.
Contacts
The contacts of the function block are evaluated in the
standard circuit diagram. A closed contact indicates:
Memory requirement of the function block
The arithmetic function block requires 40 bytes of memory
plus 4 bytes per constant at the function block inputs.
Operation of the function block
The values present at the inputs >I1 and >I2 are associated
with the arithmetic operation set as the mode.
If the calculation result exceeds the value range that can be
represented, the overflow signal contact CY closes and
output QV> contains the value of the last valid operation.
When the function block is called for the first time, the value
at output QV> equals zero.
Parameters Function, parameterisation in the function
block
QV>
Value: -2147483648 - +2147483647
Parameters Function, parameterisation in the function
block
AR..CY
Value range exceeded
AR..ZE
Result at output QV> is zero