HEIDENHAIN TNC 620 User Manual page 589

Set protocol
(protocol no. 106702)
The data transfer protocol controls the data flow of a serial
transmission (comparable to MP5030 of the iTNC 530).
Here, the BLOCKWISE setting designates a form
of data transfer where data is transmitted in blocks.
This is not to be confused with the blockwise data
reception and simultaneous blockwise processing by
older TNC contouring controls. Blockwise reception
of an NC program and simultaneous machining of the
program is not possible!
Data transmission protocol
Standard data transmission (transmission
line-by-line)
Packet-based data transfer
Transmission without protocol (only
character-by-character)
Set data bits
(dataBits no. 106703)
By setting the data bits you define whether a character is
transmitted with 7 or 8 data bits.
Check parity
(parity no. 106704)
The parity bit helps the receiver to detect transmission errors. The
parity bit can be formed in three different ways:
No parity (NONE): There is no error detection
Even parity (EVEN): Here there is an error if the receiver finds
that it has received an odd number of set bits
Odd parity (ODD): Here there is an error if the receiver finds that
it has received an even number of set bits
Set stop bits
(stopBits no. 106705)
The start bit and one or two stop bits enable the receiver
to synchronize each transmitted character during serial data
transmission.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Setting up data interfaces 17.10
Selection
STANDARD
BLOCKWISE
RAW_DATA
17
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