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TE2000 | HMI Engineering · 0 次阅读

RequestListener Events

The RequestListener type exposes the following members.

Events

 

Name

Description

RequestListener Events 1:

OnRequest

Called when a client requests a symbol from the domain of the TwinCAT HMI server extension. This event will be called multiple times if RequestType equals Subscription.In a subscription the returned data will only be sent to clients if either the read value or the return codes changed.

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