HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 544)

MOD functions
18.8 Setting up data interfaces
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
Setting handshaking (flowControl)
By handshaking, two devices control data transfer between them.
A distinction is made between software handshaking and hardware
handshaking.
No data flow checking (NONE): Handshaking is not active
Hardware handshaking (RTS_CTS): Transmission stop is active
through RTS
Software handshaking (XON_XOFF): Transmission stop is active
through DC3 (XOFF)
File system for file operations (fileSystem)
In fileSystem you define the file system for the serial interface.
This machine parameter is not required if you don't need a special
file system.
EXT: Minimum file system for printers or non-HEIDENHAIN
transmission software. Corresponds to the EXT1 and EXT2
modes of earlier TNC controls.
FE1: Communication with the TNCserver PC software or an
external floppy disk unit.
Settings for data transfer with the TNCserver PC
software
Enter the following settings in the user parameters
( serialInterfaceRS232 / definition of data blocks for the serial
ports / RS232 ):
Parameters Selection
Data transfer rate in baud Has to match the setting
in TNCserver
Data transmission protocol BLOCKWISE
Data bits in each transferred
character
7 bits
Type of parity checking EVEN
Number of stop bits 1 stop bit
Specify type of handshake: RTS_CTS
File system for file operations FE1