Deed to get data from PLC (Delta EX2 or Delta SA2) to my VB software (in PC) through RS 485. I have got only 1 RS 485 port available which is connected to SCADA (Advantech). The VB is used only for report generation (SLAVE).
According to the user manual the Delta EX2 supports MODBUS ASCII.
A VB MODBUS ASCII driver/stack to communicate with the device will be needed. Then VB code to read the desired data, format the data, convert the data to a human readable text and output in some form.
Or you could purchase an HMI, like PeakHMI, that only needs configuration and use.