HEIDENHAIN TNC 306 Technical Manual - Manual (Page 446)

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TNC 406/TNC 306 3 Standard data transmission protocol 8-33
3.1.6 Reading in an offered program
After commencement of transfer, the peripheral unit sends the first program module until the
receiving buffer of the TNC is full. The TNC then stops transmission with <DC3> and awaits
acknowledgment from the user. If the file is to be transferred, the TNC sends <DC1> and the
program is read in and stored. Otherwise the file is only read in and not stored. If hardware
handshaking is set, transfer by using the RTS signal is stopped and restarted.
Peripheral unit
<NUL> <NUL>
1st line of file 1 <CR> <LF>
2nd line of file 1 <CR> <LF>
Last line of file 1 <CR> <LF> <ETX>
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<NUL>
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Last line of last file <CR> <LF> <ETX>
Transmission path
<DC1>
TNC
<EOT>
<DC1>
<DC1>
<DC1>
.
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<ETX>
<DC3> Polling:
Read in
Yes / No