Hello,
I'd like to write a value into the parameter P-0-0397. This parameter contains of 2 elements. How to write on element '0' with FB IL_CATSoeWrite? Currently, the result is a timeout error....
To write this parameter of an IndraDrive
Writing value in element 0 of P-0-0397
Best reply by CodeShepherd
See my example for the ctrlX DRIVE. Beware that the values in my case is 4 Byte and the digits after decimal point are 3. In IndraDrive it is 2 Byte and 1 digit. I created an own structure corresponding to the drive parameter that then is written via IL_ECATSoeWrite:
Struct:
TYPE MyTableStruct :
STRUCT
ActLength : UINT;
MaxLength : UINT;
ArrayOfElements : ARRAY[0..3] OF UDINT;
END_STRUCT
END_TYPE
Declaration:
PROGRAM Read_Write_StringParameter
VAR
fbECATSoeWrite: IL_ECATSoeWrite;
WriteList: MyTableStruct := (
ActLength:= 16(*number of bytes*),
MaxLength := 16(*number of bytes*),
ArrayOfElements := [1000,2000,3000,4000](*number multiplied with digits after decimal point*));
bExecute: BOOL;
strMasterName: STRING := 'ethercatmaster';
fbECATSoeRead2: IL_ECATSoeRead;
bExecuteRead: BOOL;
rDiagnosis: IL_ST_SOE_STRING;
END_VAR
Implementation:
fbECATSoeWrite.Execute := bExecute;
fbECATSoeWrite.MasterName := ADR(strMasterName);
fbECATSoeWrite.SlaveAddress := 1001;
fbECATSoeWrite.Idn := IL_ECATSOEIdnCoding(SOE_P_PARAM,0,397);
fbECATSoeWrite.ValueAdr := ADR(WriteList);
fbECATSoeWrite.SizeOfValue := WriteList.ActLength(*number of bytes that should be written*) + SIZEOF(WriteList.MaxLength) + SIZEOF(WriteList.ActLength);
fbECATSoeWrite();
IF TRUE = fbECATSoeWrite.Done THEN
; // FB finished .
END_IF
IF TRUE = fbECATSoeWrite.Error THEN
fbECATSoeWrite.ErrorID;
fbECATSoeWrite.ErrorIdent.Table;
fbECATSoeWrite.ErrorIdent.Additional1;
fbECATSoeWrite.ErrorIdent.Additional2;
; // Error handling
END_IF
5 replies