Hi

Of course i could read all the 128 array elements. But I have to read a lot of other items too.
So if i would do that for all items, that have the same issue, i would read perhaps 10 or 20 times more items then realy needed.

I am alittle bit afraid that the OPC Server is too much loaded in this case.

What would you suggest?

1) Should i read with multiple item reading method all the arrays?
2) Or should i read with single tag item reading method, and read repeatedly, until i get null as value?

Which alternative would be better from the aspect of loading the OPC Server less.?
I know definitly that 2 is slower.

Hello
I use the below code, which i use to read multiple OPC DA items from the server. So far working fine.
But i have one use case, where i cannot use this multiple reading method very well:
I have to read the Axis names of a CNC machine over an Array OPC DA Item. Because i don't know the number of axis (there is no Item showing this)
I have to read the max possible number of Axis names of the array (The array lenght is perhaps 128, but there are only 12 axis). Isn't it possible to make a query each time in the multiple item reading method, and stop the reading when item value is null or empty?

Alternatively i am using the single item reading method. Here i can make a query, but reading all the tags takes much longer then multiple reading.

//Code for multiple reading
var client = new EasyDAClient();

DAVtqResult[] vtqResults = client.ReadMultipleItems("OPCLabs.KitServer.2",
new DAItemDescriptor[]
{
"!BSTR," + OPC_device_name + ",NC.AxisNamesPhys{0",0}",
"!BSTR," + OPC_device_name + ",NC.AxisNamesPhys{1",0}"
"!BSTR," + OPC_device_name + ",NC.AxisNamesPhys{2",0}"
...
...
// I have toread 128 times to be sure that i have read all the axis names

});