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Variable Read

Variable Read

  • Library:
  • Variable Read block


The block is used as an input variable assignment.


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Specify the data to be read, 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 Data 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'
Introduced in R2019a