XIC

Examine If Closed

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Description

XIC is one of the building blocks of a ladder diagram. The XIC block implements the XIC ladder logic instruction. The block examines the operand tag (data bit) for an on condition. If the bit is set, the rung is enabled. If the bit is clear, the rung is disabled.

Parameters

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.

Programmatic Use

Block Parameter: PLCOperandTag

Type: character vector

Value: character vector

Default: 'A'