GetDeviceTwin (FB)¶

FUNCTION_BLOCK GetDeviceTwin EXTENDS CBM.ETrigTo

Reads the device twin from the Microsoft AZURE IoT Hub via HTTPS.

InOut:

Scope	Name	Type	Comment	Inherited from
Input	xExecute	BOOL	Rising edge: Action starts 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) are present at the outputs for exactly one cycle.	ETrigTo
	udiTimeOut	UDINT	Defines the time (µs) after which an FB (e.g. requiring an external acknowledgement) aborts operation due to a timeout with error message.	ETrigTo
Output	xDone	BOOL	TRUE: Action successfully completed	ETrigTo
	xBusy	BOOL	TRUE: Function block active	ETrigTo
	xError	BOOL	TRUE: Error occurred, function block aborts action FALSE: No error	ETrigTo
Input	sHubDomainName	STRING(255)	Domain name of the IoT Hub
	sDeviceId	STRING(255)	Device ID
	wsSaS	WSTRING(255)	Shared Access Signature (SAS Token)
Output	eError	IOT_HUB_CLIENT_ERROR	Error code
	iHttpStatus	INT	HTTP status
	wsData	WSTRING(WEB_CLIENT.g_udiMaxResponseSize)	The device twin (JSON data)