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pCOWeb +030220471 – rel. 1.0 – 02.05.2007 14

3.2 ESTABLISHING A CONNECTION BETWEEN THE PC AND pCOWeb VIA A NETWORK

Starting situation:

• pCOWeb installed on the pCO controller (see chapter

2 on page 9).

NOTE: if the controller is connected to the final installation and is not already on, before switching it on contact the installation manager.

• pCOWeb already connected to the Ethernet network; in this case, a standard cable (NOT a crossover cable) is used to connect pCOWeb to the network

node.

• pCOWeb network communication parameters already correctly configured.

• Knowledge of the IP address of the pCOWeb being connected to.

• PC already connected and configured for the data network.

In the following example, the IP address of pCOWeb is assumed to be 10.0.0.145.

1. On the PC, open Internet Explorer and type the address of the pCOWeb

(example 10.0.0.145), then press ENTER.

IMPORTANT

the pCOWeb must have completed the start-up phase

(check that the Status LED is flashing normally), otherwise

the required web pages will not be sent to the PC.

2. If the network administrator has already correctly fitted the network devices,

pCOWeb will be accessible from the PC and the pCOWeb main page

(index.html) will be shown. This page can be customised by the user; by

default the page appears as shown in

Figure 3.k below.

If the page is not displayed:

• check that the computer has effective access to the data network (for example, try using Internet Explorer to access other sites with assured

accessibility);

• check the indicator LEDs on the pCOWeb, with reference to paragraph

3.1.3 on page 13 (the role of the PC in this case is performed by the

switch or the hub);

• consider that the PC can access pCOWeb only in one of these conditions:

o the network server features a proxy

: in this case, the PCs connected to this type of network have already been set to use the proxy; the

network administrator needs to modify the settings of the proxy on the server to make pCOWeb accessible from the PC;

o or the network does not feature a proxy or in any case this is not intended to be used

: on the PC disable the use of the proxy; if the IP

addresses of the PC and pCOWeb are incompatible for direct communication (see

APPENDIX B on page 53) the administrator must

set the “gateway” network device for communication between devices with incompatible IP addresses;

o or the IP addresses of the PC and pCOWeb are already compatible for direct communication

(see APPENDIX B on page 53): in this

case it is normally sufficient to disable the proxy on the PC (see point C in paragraph

3.1.1 on page 10); remember that disabling the

proxy usually prevents access from the PC to other Internet sites; remember to enable it again when needed.

To avoid losing access to other sites, as an alternative the proxy can be disabled only for one or a few IP addresses:

see point C in paragraph

3.1.1 on page 10, however with the variants shown in Figure 3.l on page 15 (example for pCOWeb with IP

address 10.0.0.145).

Figure 3.j - Opening the index page

Figure 3.k – The default “index.html” page

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Carel plug-in Manuel d'utilisateur Page 14

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