EthDNSResolve (FB)

FUNCTION_BLOCK EthDNSResolve EXTENDS AC500_StateMachine.AbbETrig

Resolve a Hostname to an IP via a DNS server (in async task)

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	Execute	BOOL	FALSE	A rising edge starts the operation, the output Busy goes to TRUE. In the first cycle all other inputs are read and stored, afterwards they are ignored. A falling edge does not stop the operation. After Done = TRUE or Error = TRUE and Execute = FALSE all outputs will be reset.	AbbETrig
Output	Done	BOOL	FALSE	Operation is completed without error (while outputs Busy and Error are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE	AbbETrig
	Busy	BOOL	FALSE	Operation is running (while outputs Done and Error are FALSE)	AbbETrig
	Error	BOOL	FALSE	Operation is stopped with error (while outputs Busy and Done are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE. The output ErrorID gives more details about the error.	AbbETrig
Input	Hostname	STRING(255)	‘’	Hostname to be resolved
	IPAdrServer	DWORD	0	IP address of the DNS server to query (big endian)
Output	ErrorID	ERROR_ID	ERROR_ID.NO_ERROR	Error code that describes the occured error
	IPAdr	DWORD	0	IP address that was resolved by the DNS server (big endian)
	IPAdrString	STRING(16)	‘000.000.000.000’	IP address that was resolved by the DNS server (as dotted quad String)