Configuring the Heidenhain TNC 370 control requires precise adjustment of RS232 communication parameters to ensure reliable data transfer. When utilizing Drip-Feeding (DNC), the blockwise protocol is essential to prevent buffer overflows during high-density milling routines. By accurately setting machine parameters 5010 through 5030, you can integrate your CNC control into a modern DNC environment seamlessly. Troubleshooting common communication failures, such as parity errors or handshake timeouts, often begins with verifying that the baud rate matches the PC port settings and confirming that the DC3 (XON/XOFF) flow control is strictly observed. Mismatched parity or stop bits are frequent culprits; ensure these mirror your software settings exactly to maintain stable, error-free machining operations.
| Parameter | Value | Comments |
|---|---|---|
| Baud Rate | Supports 110-38400 Baud. 4800 recommended for file transfer; DNC typically requires the blockwise protocol. | |
| Interface | EXT | RS232 Interface |
| 5010.0 | 515 | |
| 5010.1 | 17736 | |
| 5010.2 | 16712 | |
| 5010.3 | 279 | |
| 5010.4 | 5382 | |
| 5010.5 | 4 | |
| 5020 | 104 | 7 Data bits, Even parity, 2 Stop bits, DC3 (XOn/XOff) |
| 5030 | 1 | Blockwise protocol enabled (0 = Disabled) |
Cable Diagrams and Notes
The Heidenhain TNC 370 supports the blockwise protocol via parameter 5030. Ensure your DNC software (e.g., EasyDNC) is specifically configured to utilize the Heidenhain protocol mode.
RS232 Cable: 9-pin (PC) to 25-pin (CNC)
