Individual network settings for each port
When necessary, you can make fixed network settings for the transmission characteristics of each available interface (port). The "Automatic setting" is selected by default. In normal situations, this guarantees problem-free communication.
If problems do occur in communication (such as when connections cannot be established or frequent network disruptions occur), this may be the result of unsuitable network settings, either selected or automatic. In this case, you should select a network setting that is suitable for your network configuration.
Functional description of the automatic switchover
All ports of the CP provide a 10/110 Mbps full duplex connection with autosensing and autonegotiation of the network settings. These functions run as follows after turning on the CP:
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The CP attempts to detect the transmission speed used by the partner.
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If detection is possible, the CP attempts to negotiate the optimum duplex mode with the partner.
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If no negotiation is possible, the CP uses the previously detected transmission speed and half duplex.
This takes approximately 2 seconds.
The "Automatic setting" also includes an autocrossing mechanism; this means that you can use a crossover or straight-through cable for the connection regardless of the properties of the partner device.
Changing to individual network settings
If you create any configuration manually, automatic switchover is no longer effective. This also applies to the autocrossing mechanism integrated in the CP. If the connected partner device does not support the autocrossing mechanism, you will need to use a crossover cable (for a switch) or a straight-through cable (for an end device).
"Disable" port option:
Depending on the module type, the drop-down list includes the "- Disable -" option. This option, for example, allows you to prevent access to an unused port for security reasons.
See also
Further information
Please read the manual on the relevant CP for further information.