John_R Posted September 11, 2020 Report Share Posted September 11, 2020 Hey All, I'm in the midst of upgrading an older V120 project to a V350. The V120 has two installed serial ports; I use Port 1 for programming and Port 2 for RS485/MODBUS to an AB VFD The V350 has one installed serial port along with a USB port. The spec sheet says; "Note that physically connecting a PC to the controller via USB suspends RS232/RS485 communications via Port 1. When the PC is disconnected, RS232/RS485 resumes." So, in essence this means I could use Port 1 for my RS485/MODBUS, and can plug into the USB if I need to program. I guess the downside is that I would not be able to see the MODBUS data in debug. So my inclination is to add in the second serial port. But... at some point in the future I may want to add an ethernet card... Question is, can I install both a second serial card and an ethernet card? JohnR Quote Link to comment Share on other sites More sharing options...
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