I have a V350 on the field. The PLC is connected to the internet with a DTU modem which acts like an IP to Serial bridge. The DTU is a transparent serial bridge betaween my computer at the office and the PLC on the field.
On my comuter I have a virtual com port which directs all the communication to the serial port of the DTU whcihis connected the COM1 of the V350.
I have no problems reading data from the V350 using my SCADA software.
But when I try to download a new software using Visilogic. If there is a communication error with the V350 during the download, the Visilogic is t