English (GB)
22
16. Data communication
The CU 372 incorporates hardware that enables communication with external units, such as a computer, via an external GENIbus or
Ethernet connection.
Fig. 40
Data communication via external GENIbus and Ethernet connections
16.1 Ethernet
Ethernet is the most widely used standard for local area networks
(LAN). The standardisation of this technology has created some
of the easiest and cheapest ways of creating communication
between electrical units, for instance between computers or
between computers and control units.
The web server of the CU 372 makes it possible to connect a
computer to the CU 372 via an Ethernet connection. The user
interface can thus be exported from the CU 372 to a computer so
that the CU 372 and consequently the RCME system can be
remotely monitored and controlled.
In order to use the web server, you must know the IP address of
the CU 372. All network units must have a unique IP address to
be able to communicate with each other.
It is possible to change the factory-set IP address by
configuration or by activating a DHCP (Dynamic Host
Configuration Protocol), either directly in the CU 372 or via the
web server. See the example in fig.
.
Fig. 41
Example of Ethernet setting
Dynamic assignment of an IP address for the CU 372 requires a
DHCP server in the network. The DHCP server assigns a number
of IP addresses to the electrical units and makes sure that two
units do not receive the same IP address.
Use a standard Internet browser when connecting to the web
server of the CU 372.
If you want to use the factory-set IP address, no changes are
required in the display. Open the Internet browser, and enter the
IP address of the CU 372.
In order to use dynamic assignment, the function must be
enabled. Click [OK] when the "Use DHCP" line is highlighted.
A tick shows that the function has been enabled. Open the
Internet browser, and enter the CU 372 "
Host name
" instead of
the IP address (the host name is stated at the top of display
4.7.5). The Internet browser will now try to establish connection
to the CU 372.
This is the first display that appears when connecting to the
CU 372.
Fig. 42
Connecting to the CU 372
TM
05 69
26 03
13
CIM 270
CU 372
WWW
Ethernet
Note
We recommend that you protect the connection
to the CU 372 in consultation with the system
administrator according to your safety
requirements.
Di
spla
y_
4.7.5
Note
DHCP requires a host name.
The host name can only be changed by means of
a GSC file (configuration file) or via a web server.
See the Change of network setting section,
page
.
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