XIO

Examine If Open

Library:

Description

XIO is one of the building blocks of a ladder diagram. The XIO block implements the XIO ladder 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.

Parameters

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`Operand Tag` — Bit to be tested
A (default) | boolean

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 Data Type, Initial Value, and size. To change the attributes of the Operand Tag, open the Program Variables table within the Ladder Diagram Program block.