HEIDENHAIN TNC 620 User Manual page 407

HEROS functions | Setting up data interfaces
Set handshake
(flowControl no. 106706)
By handshaking, two devices control data transfer between them.
A distinction is made between software handshaking and hardware
handshaking.
Setting Meaning
NONE No data flow control
Handshake is not active
RTS_CTS Hardware handshaking
Transmission stopped by RTS active
XON_XOFF Software handshaking
Transfer stopped by DC3 (XOFF) active
File system for file operation
(fileSystem no. 106707)
In fileSystem you define the file system for the serial interface.
If you require no special file system, this machine parameter is not
needed.
Setting Meaning
EXT Minimum file system for printers or non-HEIDEN-
HAIN transmission software. It corresponds to
the EXT1 and EXT2 operating modes on older
HEIDENHAIN controls.
FE1 Communication with the TNCserver PC software
or an external floppy disk unit
Block check character
(bccAvoidCtrlChar no. 106708)
The Block Check Character (BCC) is a block check character.
The BCC is optionally added to a transfer block to simplify error
detection.
Setting Meaning
TRUE Ensures that the BCC does not correspond to a
control character.
FALSE Function not active
Condition of RTS line
(rtsLow no. 106709)
This optional parameter determines the level of the RTS line in the
idle state.
Setting Meaning
TRUE The level is low in the idle state
FALSE The level is high in the idle state
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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