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8.8 Data communication
CU 352 is equipped with a hardware enabling communication with external units, such as a computer, via an external GENIbus or
Ethernet connection.
Third-
party
gateway
Fig. 139 Data communication via external GENIbus and
8.8.1 Ethernet
Ethernet is the most widely used standard for local networks
(LAN). The standardisation of this technology has created some
of the easiest and cheapest ways of creating communication
between electric units, for instance between computers or
between computers and control units.
The webserver of CU 352 makes it possible to connect a
computer to CU 352 via an Ethernet connection. The user
interface can thus be exported from CU 352 to a computer so that
CU 352 and consequently the system can be monitored and
controlled externally.
We recommend that you protect the connection to
CU 352 according to your safety requirements in
consultation with the system administrator.
In order to use the webserver, you must know the IP address of
CU 352. All network units must have a unique IP address to
communicate with each other. The IP address of CU 352 from
factory is 192.168.0.102.
Alternatively to the factory-set IP address, it is possible to use a
dynamic assignment of IP address. This is possible by activating
a DHCP (Dynamic Host Configuration Protocol) in CU 352 or via
the webserver. See the example in fig. 140.
Fig. 140 Example of setting of Ethernet
74
Grundfos CIU
communication
interface
External GENIbus
connection
Internet
Intranet
External
GENIbus module
(option)
Ethernet connection
Ethernet connection
Dynamic assignment of an IP address for CU 352 requires a
DHCP server in the network. The DHCP server assigns a number
of IP addresses to the electric units and makes sure that two units
do not receive the same IP address.
A standard internet browser is used for connection to the
webserver of CU 352.
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 CU 352.
If you want to use dynamic assignment, you must enable the
function by selecting "Use DHCP" and clicking [OK]. A check
mark shows that the function has been enabled.
Open the internet browser and enter the host name of CU 352
instead of the IP address. The internet browser will now try to
connect to CU 352. The host name can be read in the display, but
can only be changed by either a GSC file (configuration file) or via
a webserver. See section
Change of network setting
A host name is required to use DHCP.
on page 75.
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