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
<ACK>
.
.
.
<ETX>
<SOH> <H> <E> <ETB> BCC <DC1>
Transmission path TNC
<ACK>
<EOT>
<ACK>
.
.
.
<STX> 1st line PGM1 <ETB> BCC <DC1>
<STX> Last line of last file <ETB>
<SOH> <H> <E> <ETB> BCC <DC1>
<SOH> <H> <E> <ETB> BCC <DC1>
<ACK>
.
.
.
<STX> Last line PGM1 <ETB> BCC <DC1>
<ACK>
.
.
.
BCC <DC1>
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 <ACK>) and awaits acknowledgement.
If a positive acknowledgement is given then the program is read in. Otherwise a header is
immediately sent again.