52
COMMUNICATION PROBLEMS
Hardware Problems —
See Table 20 for potential
communication issues caused by hardware problems.
Web Interface Problems —
tial communication issues caused by web interface issues.
The intranet site of the unit is the IP address (see Unit IP
Address on page 49).
NOTE: The unit cannot automatically obtain the network
parameters via a DHCP server.
Table 20 — Hardware Problems
Table 21 — Web Interface Problems
NOTES:
1. The unit cannot automatically obtain the network parameters
via a DHCP (Dynamic Host Configuration Protocol) server.
2. The intranet site address of the unit is the IP address.
SYMPTOMS
POSSIBLE CAUSES
CHECKS
SOLUTIONS
The unit does not respond to the
instructions sent by the supervi-
sion PC on the CCN bus.
Problem at the RS485 converter
level of the PC or connection prob-
lem on the primary CCN bus.
Check the CCN cable connec-
tions. The unit CCN address is 0.1
and the communication speed is
9600 baud by default.
Replace the RS485 connector.
Communication problem when
connecting two buses (primary bus
and secondary bus).
Electrical problem between 0 v
CCN of the primary bus and 0 v
CCN of the secondary bus.
Check the connection of the metal
part of the interface casing to
earth.
Connect the metal part of the inter-
face casing to earth.
SYMPTOMS
POSSIBLE CAUSES
CHECKS
SOLUTIONS
Start-up page loads, then goes to
fault state.
Network property details are not
valid.
Ethernet network is not available.
Check the network parameters
(see the section Ethernet/IP Con-
nection Problems on page 53).
Check to see if the orange LED on
the unit is flashing.
Contact your system administra-
tor.
Check the Ethernet connection to
the local network if the orange
LED does not flash.
While accessing the unit via the
web browser, the Java platform
launches, but remains blocked. No
file is loaded.
Proxy server problem in the local
network.
Contact your system administra-
tor.
In agreement with the system
administrator, open the Runtime
Java control panel and select
Direct Connection in the system
parameters and/or request in the
web browser (Tools
Options
Connection
System parameters)
that no proxy server is used to go
to the local addresses. If possible,
uncheck “use of an automatic con-
figuration script.” Restart the web
browser.
The application has been
launched, but the screens are not
shown in the web browser.
A proxy server is used to access
the unit and this supplies the old
screens to the browser. Incorrect
configuration of the Java applica-
tion.
Check that the web browser does
not go via a proxy server to access
the unit. Check that the Java appli-
cation does not store the internet
files on the PC.
Open the browser and in the sys-
tem connection parameters add
the IP address of the unit in the
proxy exceptions. (Tools
Options
Connection
System parame-
ters
“No proxy for”). See the sec-
tion Java Application Configuration
on page 54.
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