1. Make sure to set the communication settings below correctly
- Baud Rate Select: 9600bps (fixed)
- Data bits: 8 bits (fixed)
- Parity: None (fixed)
- Stop Bits: 1(fixed)
2. A RS232 crossover cable and a RS232 adapter are included in the package of IFPxx50 series. Make sure to install both RS232 cable and adapter.
3. It's recommended to vController to control IFPxx50 by RS232.
Here's the download link and tutorial in YouTube for reference.