Examine If Open
XIO is one of the building blocks of a ladder diagram. The
XIO block implements the
XIO ladder logic instruction. The
block examines the operand tag (data bit) for an off condition. If the bit is clear, the rung
is enabled. If the bit is set, the rung is disabled.
Operand Tag— Bit to be tested
Specify the data bits to be tested. Data bits are specified in the format of
tags. In Ladder Diagrams, tags (variables) are used for
representing all inputs, outputs, and internal memory with attributes such as
Initial Value, and
size. To change the attributes of the
Tag, open the Program Variables table within the
Ladder Diagram Program block.
|Type: character vector|
|Value: character vector|