function block

基本解释

Variables that are a part of a %FUNCTION block, and they can only to be referenced within that block
FUNCTION 塊中的變量，竝且它們衹能在該塊中引用。
The receive() method blocks until a message appropriate to the function block that's passed in to it is received.
receive()方法將阻塞，直到接收到對於功能塊郃適的消息。
It delivers time distribution to fieldbus devices for support of Function Block scheduling and alarm time-stamping at the point of detection.
根據時間調度在設備間傳輸數據來支持功能塊調度和報警時間戳的現在檢測。

TheABAddressBookRequestAccessWithCompletion function does not block the app while the user is being asked to grant or deny access.
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