Barracuda Networks SP4 Bedienungsanleitung PDF herunterladen (Seite 48)

MANAGING BARRACUDA in GROUPS

ENG

Axel Technology srl

www.axeltechnology.com

21.2 SECOND STEP: THE ‘WORK MODE’

Once the system tree has been created in ‘EDIT

MODE’, click CLOSE PANEL button.

The User will be asked whether to save or discard

modifications done to the System Tree. Click Yes.

Click Open Panel button: User 1 Navigation Panel

will open. Click WORK MODE button.

The Smart Coder Remoter will display the same

System Tree just created in the EDIT MODE, but

You will now be able to configure real operating parameters for each element in the system, such as ComPort, IP

address, speed, etc and then establish a physical connection to the Target(s).

Follow the same procedures shown in the ‘BASIC CONNECTION TO A SINGLE CODER’ for proper configuration

of connection channels and targets.

21.3 CONFIGURATION OF A MONO-DIRECTIONAL COM CHANNEL

As already stated, a system composed by a single Pc at the head of the network and by several distant Barracuda units

(Targets) may require mono-directional com channels, i.e. channels which do not support any data stream from the

Target back to the central control Pc. Monodirectional Com channels are usually available over satellite links.

In general, a Mono-directional channel may be RS-232 or Modem type. In both cases, You will need to configure which

Serial Port and which speed must be used.

SERIAL PORT

It selects the Pc Serial Port to be used for the connection (from 1 to 255). In the event of an USB

modem, check which ‘virtual’ Serial port is automatically selected by the Pc.

SERIAL SPEED

It sets the maximum Baud Rate for the selected Pc port. By default, the BSN will show the

maximum value (38400 Baud),

The communication Baud Rate set on the Pc Control Software MUST MATCH the corresponding Baud

Rate set for the linked Serial Port on the Barracuda. For example, if Serial Port 1 on the Barracuda

runs at 4800 Baud, the same speed must be set also for the Pc Serial Port involved in the link.

In addition to connection speed, also a

‘packet redundancy’ factor may be set, in

order to increase robustness of the link

against transmission errors.

In practice, no packet redundancy means

each transmitted racket contains ‘original’

information, not duplicated.

One packet redundancy means each data packet is followed by a second packet bearing the same information. If the

first packet gets corrupted, the second is used to recover original transmitted information.

With the same philosophy, Two packets Redundancy means each data packet is followed by two redundant packets;

Three packets Redundancy means each data packet is followed by three redundant packets, etc.

As one may easily understand, maximum link reliability is achieved by setting Four Packet Redundancy, even if it

involves a ‘real’ (payload) connection speed which is one fifth of that selected in the ‘Serial Speed’ menu.

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