libnodave - reading daveV memory

MarkinNL

Member
Join Date
May 2007
Location
CANADA
Posts
1
Hi, I've written a program which connects to a Siemens S7-200 (cpu 226) and I can sucessfully read and write to inputs and outputs.

However when I try to read daveV memory, readbytes() returns 3 which libno.cs says means "item is not available". Specifically:

daveResItemNotAvailable200 = 3; /* means a a piece of data is not available in the CPU, e.g. */

Any ideas?

Thanks, Mark
 

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