2 t ransf er method – HEIDENHAIN CNC Pilot 4290 User Manual

Page 428

10 Transfer

416

0.2 T

ransf

Method

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The menu items ”Serial” and ”Setting – Serial” are

selectable only if an interface is assigned in ”External
input/output” (control parameter 40).

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The parameters of the serial interface are saved in one of

the control parameters 41 to 47 (depending on the setting
in control parameter 40).

Configure serial interface or printer

Select ”Setting – Serial/Printer” (in the Transfer

mode)

Enter data in ”Setting serial/printer” dialog box

Parameter
Define the following interface parameters in
consultation with your communications partner.

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Baud rate (in bits per second): The baud rate is
defined according to the local condition (cable
length, interference, etc.). A high baud rate has the
advantage of fast data transfer. A lower baud rate,
however, is more stable.

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Word length: Choose between 7 or 8 bits per

character.

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Parity: If you select even/odd parity, the CNC PILOT
adds a parity bit so that an even/odd number of set
bits are transferred per character. The parity can be
checked at the distant terminal.
If you define ”No parity,” the characters are
transferred as they are saved.
The parity bit is transmitted in addition to the
number of bits defined in ”Word length.”

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Stop bits: Choose between 1, 1 1/2 and 2 stop bits.

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Protocol:

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Hardware (hardware handshake): The receiving

terminal informs the transmitting terminal by way of
the RTS/CTS signals that it is temporarily unable to
receive data. A hardware handshake presupposes
that the RTS/CTS signals are hardwired in the data
transfer cable.

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XON/XOFF (software handshake): The receiving

terminal transmits XOFF if it is temporarily unable
to receive data. with XON is indicates that it can
receive data again. The software handshake needs
no RTS/CTS signals in the transmission cable.

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ON/XOFF (software handshake): The receiver

transmits XON at the beginning of data
transmission to indicate that it is ready to receive.
When the receiver is temporarily not able to receive
data, it transmits XOFF. With XON is signalizes that
it can receive more data. The software handshake
does not require the transmission of RTS/CTS
signals over the data transfer cable.

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Device name:

COM1: RS-232-C/V.24 data interface