L_IPAP_ParameterRead

The L_IPAP_ParameterRead function block serves to read the device and PLC parameters of the Lenze Controller by the PLC application.

Name Datentyp	Value / meaning
xExecute BOOL	FALSE ä TRUE	With the rising edge of the xExecute input, the read request of a parameter is started.
xAbort BOOL	FALSE ä TRUE	Abort processing of the FB
wIndex WORD	Index of the parameter to be read
bySubIndex BYTE	Subindex in the object directory of the master or the slaves.
udiTimeOut UDINT	Timeout in milliseconds [ms] The value '0' corresponds to a request without timeout.
pDataBuffer POINTER TO BYTE	Reference to the memory buffer into which the values to be read are to be copied.
udiBufferSize UDINT	Size of the memory buffer passed under pDataBuffer . The memory buffer must be large enough to hold the read value.

Name Datentyp	Value / meaning
xDone BOOL	TRUE	Processing is completed
xBusy BOOL	TRUE	Processing is running
xAborted BOOL	TRUE	Processing of the FB has been aborted.
xError BOOL	TRUE	An error has occurred. For details see eErrorID .
eErrorId L_IPAP_ERRORID	If xError = TRUE: Error number for the error that has occurred.
udiDataRead UDINT	Number of bytes actually read during the read request
eDataType L_IPAP_DATATYPE	Indication of the data type of the read parameter

Read parameter 0x2001:000 “Device name” (data type: STRING)

PROGRAM PLC_PRG

VAR

END_VAR

(* read device name *)

// index can be set as hexadecimal- or as decimal value

index := 16#2001; //or: index := 8193

subindex := 0;

fbParameterRead(

);

Read parameter 0x2452:001 “Active eng. port settings: IP address” (data type: UDINT)

PROGRAM PLC_PRG

VAR

END_VAR

(* read IP address to UDINT value*)

fbParameterRead(

);

(* or read IP address to array of 4 BYTES*)

fbParameterRead( xExecute := read,

);