Data Transmission Protocols; Selection Of Transmission Protocols - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

8.4 Data Transmission Protocols

The operating modes are assigned the following transmission protocols:

Operating modes

EXT1, EXT2, EXT3

The following applies to all data transmission protocols except LSV2:

If an incoming file is already stored in the TNC, the TNC will ask you whether

you really wish to overwrite this file:

Press a soft key to continue the transmission.

If you attempt to overwrite a write-protected file, the TNC displays the error

message Protected file!:

Press the ADDITIONAL FUNCTION UNPROTECT soft key to cancel write-

protection and continue the transmission.

If a file has been read out and the data transfer menu has been terminated

with the END key, the TNC outputs the characters <EXT> and <EOT>.

If a transmission is terminated with the END key, the error message "Program

incomplete" is issued.

Transmission protocol

Select a protocol with BCC and with fixed

control characters

1 start bit, 7 data bits, 1 stop bit

Select data format and transmission protocol

using machine parameters

Start this protocol from a PC or from the TNC.

The protocol runs in the background of the

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