is Siemens' official software for serial communication (RS232) between a PC and older Sinumerik CNC controllers

: A native COM port is recommended, though high-quality USB-to-RS232 adapters can often work. Siemens SiePortal 3. Setup and Configuration

Legacy Support: Essential for older Sinumerik models (802, 810, and 840 series) that lack modern networking interfaces.

: Highlight the programs or parameters you wish to transfer and press the "Start" softkey. 5. Troubleshooting Common Issues Handshake Errors

• Typical: Installs all drivers (recommended).
• Custom: Only choose this if you need specific serial ports.