FUNCTION_BLOCK GetDateAndTime
This function block reads the realtime clock. It returns the time of the local time zone (i.e. a possible switch to summer/standard time will be regarded). The current time zone switch can be defined by SetTimeZoneInformation. If a switch to summer/standard time has become necessary since the last polling of the time, this is done automatically. At the start of the module the outputs dtDateAndTime and eTimezone are reset. (DT#1970-01-01-00:00 and RTCLK_UNKNOWN). After successful operation they will contain the current local time.
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InOut:
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Scope
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Name
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Type
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Comment
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Input
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xExecute
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BOOL
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Rising edge: Action start
Falling edge: Resets outputs. If a falling edge occurs before the function block has completed its Action, the outputs operate in the usual manner and are only reset if either the action is completed or in the event of an error. In this case, the corresponding output values (xDone, xError, iError) are present at the outputs for exactly one cycle.
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Output
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xDone
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BOOL
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Action successfully completed
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xBusy
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BOOL
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Function block active
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xError
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BOOL
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TRUE: error occurred, function block aborts action
FALSE: no error
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eError
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ERROR
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Error description for diagnosis
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dtDateAndTime
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DT
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Current local time
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eTimezone
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PERIODE
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Current time zone
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