HEIDENHAIN TNC 335 Technical Manual - Manual (Page 542)

8/95
TNC 360 4 Data transfer with BCC 8-35
4 Data transfer with BCC
4.1 General
HEIDENHAIN TNCs, as well as allowing data transfer with the standard data transmission protocol,
also allow data transfer with a Block Check Character (BCC).
This protocol is set for the following modes:
- FE mode
- EXT mode (choice)
The data transmission protocols are identical in these modes.
In the following, the transmission protocols are listed for the various file input and output
possibilities. FE mode is set.
If an error occurs at a peripheral device, the following block must be sent to the TNC.
<SOH>"Error text"<ETB>BCC
Peripheral unit
<SOH> "Error" <ETB> BCC <DC1>
Transmission path
<EOT> <ACK>
TNC
The received error message is displayed in the TNC, but can be acknowledged and erased with the
CE key.