ONS

One Shot

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Libraries:

Description

The ONS block implements the ONS instruction. The block makes the remainder of the rung true every time the rung-condition-in transitions from false to true.

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

Storage Bit — Internal storage bit

SB (default) | boolean

Internal storage bit that retains the rung-condition-in from the last time the instruction was executed. Specified in the format of tags. 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, open the Program Variables table within the Ladder Diagram Program block.

Programmatic Use

Block Parameter: PLCOperandTag

Type: character vector

Value: character vector

Default: 'SB'

Version History

Introduced in R2019a