RES

Reset

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Libraries:

Description

The RES block implements the RES ladder logic instruction. When the rung conditions are true, the block resets the value of TIMER, COUNTER, or a CONTROL structure.

Ports

Input

EnableIn — Enable Input

off (default) | on

Controls the execution of the block. EnableIn reflects the rung state preceding the block. If the rung state preceding the block is false, EnableIn is false, the block does not execute and the outputs are not updated.

Output

EN — Enable Output

off (default) | on

By default, EnableOut follows the state of EnableIn. If the EnableIn input to the block is false, the logic implemented by the block is not executed and EnableOut signal is set to false.

Parameters

Operand Tag To Reset — Structure to Reset

A (default) | character vector

Specify the tag to reset. In Ladder Diagrams, tags (variables) are used to represent inputs, outputs, and internal memory with attributes such as Data Type, Initial Value, and size. To change the attributes of the Operand Tag To Reset, open the Program Variables table within the Ladder Diagram Program block.

Programmatic Use

Block Parameter: PLCTagToReset

Type: character vector

Value: character vector

Default: 'A'

Tag Structure — Structure Type

'TIMER or COUNTER' (default) | 'CONTROL'

Specify the structure type to reset.

Type	Description
TIMER or COUNTER	Clears the ACC field of the structure.
CONTROL	Clears the POS field of the structure.

Programmatic Use

Block Parameter: PLCTagDataType

Type: character vector

Value: 'TIMER or COUNTER'|'CONTROL'

Default: 'TIMER or COUNTER'

Version History

Introduced in R2019a