Milestone XProtect Transact Manual do Utilizador descarregar pdf (Página 21)

Milestone XProtect

Transact

Administrator's Guide

www.milestonesys.com

Administration

Flow control

Select the flow control to be used on the serial connection. Flow

control adjusts the flow of data from one unit to another, making

sure that the receiving unit will be able to handle all the incoming

data. The use of flow control is relevant in asynchronous

communication, for example when the sending unit sends data

faster than the receiving unit is able to receive it.

 None: Do not use flow control.

 XonXoff: Use the XonXoff flow control mechanism, with

which the receiving unit sends an Xoff message to the

sending unit when the receiving unit's buffer is full. When

this is the case, the sending unit will stop sending data until

it gets an Xon message from the receiving unit, indicating

that the receiving unit is again ready to receive data. Xon

and Xoff messages are sent as part of the data itself.

 CtsRts: Use the CtsRts flow control mechanism, with which

the sending unit sends an Rts (Ready to send) signal to the

receiving unit when the sending unit has data to send. In

turn the receiving unit will send a Cts (Clear to send) signal

to the sending unit when the receiving unit is ready to

receive data. Cts and Rts signals are sent on separate

wires in the cable, apart from the data itself.

 DsrDtr: Use the DsrDtr flow control mechanism, with which

units send Dsr (Data set ready) and Dtr (Data terminal

ready) signals when exchanging data.

The selected flow control mechanism must match the flow control

mechanism used by device (cash register, ATM, etc.) connected to

the serial port source.

Parity

Enter the parity-checking protocol.

Data bits

If you have nonstandard devices, enter the number of data bits per

byte that the device sends.

Stop bits

If you have nonstandard devices, enter the number of stop bits per

byte that the device sends.

Configuration

From the list of existing configurations, select the configuration to

use for the source.

Tip: A single configuration can be used for several transaction data

connections as long as the transaction data come from a source of

the same type as the source for which the configuration was

created.

Add New...

Opens the Create Configuration window, in which you can define

the properties of a new configuration (see "Create a configuration"

on page 23).

Edit...

Available only when an existing configuration is selected.

Opens the Edit Configuration window, in which you can edit the

properties of the selected configuration.

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