Rif.: Creating Network Variable array to write data

[mikejda]

Hi,

I'm trying to write a single dimension 32 element array (UInt16) to a network variable but I'm struggling to create the CNVData using CNVSetArrayDataValue().

Extract of code below which compiles but gives the runtime error -6352 Data handle is invalid. 

int status = 0;
unsigned int dump[DUMPSIZE];
unsigned long dim[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
CNVData data = 0;

for(int i=0;i<DUMPSIZE;i++)
dump[i] = DumpList[1].MemoryLocation[i];

// convert data to integer array
status = CNVSetArrayDataValue (data, CNVUInt16, dump, 1, dim);
// write data
status = CNVWrite (wtr, data, 35);
CNVDispose(data);

Anyone have an working example on how to use this function?

Mike

[RobertoBozzolo]

Not sure whether this is the correct answer, but unsigned long is a 4-byte variable, so I would use CNVUInt32 data type.

[mikejda]

Hi,

Thanks for your reply, that may not have helped but I found out I was being a bit of an idiot and needed to use the function CNVCreateArrayDataValue.

It's been a while since I've used LabWindows, quite a pleasant change to write a bit of C after years of LabVIEW.

Mike