function block

基本解釋

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，并且它們只能在該塊中引用。
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(duì)于功能塊合適的消息。
It delivers time distribution to fieldbus devices for support of Function Block scheduling and alarm time-stamping at the point of detection.
根據(jù)時(shí)間調(diào)度在設(shè)備間傳輸數(shù)據(jù)來支持功能塊調(diào)度和報(bào)警時(shí)間戳的現(xiàn)在檢測(cè)。

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