HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 691)

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TNC 407/TNC 415/TNC 425 2 TNC data interfaces 01.98
Read-in all files
In this case the TNC sends a header without a program name, and the peripheral unit sends the first
file. The TNC again outputs a header without a program name, the next program is sent and so on.
Peripheral unit
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BCC
Transmission path TNC
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1st line PGM1 BCC
Last line of last file
BCC
BCC
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Last line PGM1 BCC
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BCC
Read-in file with acknowledgement
In this mode, the TNC first of all sends a header without a program name. The peripheral unit then
starts data transfer, until it is stopped by the TNC. The TNC interrupts transfer by not sending a
positive acknowledgement (no ) and awaits acknowledgement.
If a positive acknowledgement is given then the program is read in. Otherwise a header is
immediately sent again.