I use LV 7.0 to communicate with the Siemens OPC.SimaticNET server which in turn talks to a S7-300 PLC. I experience some reproducable situations where LV hangs:
(1) when S7 program is updated via Siemens PG
(2) when an OPC item is opened in ReadWrite-Mode und continuously written in a loop (VI attached)
(3) when an OPC item is opened twice (once for read and once for write) and the value read is written back in a loop (VI attached)
The hangup does not appear with other OPC servers.
Any clues?
Tobias
PS: I haven't tried the VIs from dataskt.llb yet -- what's the difference? Are they worth a try?
