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
Input	`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)