Interface IReadable<T>

A signal that can be read by PLC.

interface IReadable<T> {
    get subscribed(): boolean;
    get value(): T;
    subscribe(subscriber: Subscriber<T>): void;
    unsubscribe(callback: Subscriber<T>): boolean;
}

Type Parameters

T

Hierarchy (View Summary)

Subscribable<T>
- IReadable

Implemented by

Signal

Index

Accessors

subscribed value

Methods

subscribe unsubscribe

Accessors

subscribed

get subscribed(): boolean
Whether there are any subscribers.

Returns boolean
Inherited from Subscribable.subscribed

value

get value(): T
Returns T

Methods

subscribe(subscriber: Subscriber<T>): void
Subscribes to be notified when an event occurs.
Parameters
- subscriber: Subscriber<T>
  The callback function.
Returns void
Inherited from Subscribable.subscribe

unsubscribe

unsubscribe(callback: Subscriber<T>): boolean
Unsubscribes.
Parameters
- callback: Subscriber<T>
  The callback function.
Returns boolean
True if the subscription was canceled, false otherwise.

Inherited from Subscribable.unsubscribe