Break Signal? No response after Init Protocol FB

Hi! Ascii and binary requests from PC to V350PLC via serialport (direkt|gsm-|landline modem) works fine with my VB.Net App, based on Vision Communication.pdf! The response is, what i asked for.... But on Alarm the PLC must connect the sleeping PC-COMPort for pop-up an ugly, red window. So i added...

Dec 21, 2011 ... Testing the VB.Net example with the unitronics CommDrive DLL: It works fine, without the problems described above, but i don't find the way how ...

Lee mas