Network Settings With Fast Ethernet - Siemens SIMATIC S7-CPs Manual

8 Further Notes on Operation
Clear/reset module − Effects
Following a memory reset, the CP retains the configured MAC address and the IP
address. The CP is therefore immediately ready for downloads using the IP
address.
The configuration data is retained on the CPU.
The CPU in the S7 station does not recognize that the CP memory was reset. The
CP changes to the "stopped with error" state (see Chapter 4). The configuration
data must then be reloaded. You can also initiate this loading by cycling power
(OFF/ON).
Rest to factory defaults − Effects
After resetting to factory defaults, the CP always retains the factory set MAC
address (as supplied).
Die IP−Adresse und die Projektierungsdaten im CP werden gelöscht. The
configuration data is retained on the CPU.
8.2

Network settings with Fast Ethernet

The configuration of the network settings "Transmission medium / duplex" is made
in the properties dialog of the relevant port of the interface in the "Options" tab:
Automatic setting or individual network settings
As default, the CP is configured for automatic detection (autosensing).
Notice
In normal situations, the basic setting ensures trouble-free communication. You
should only change these in exceptional situations.
If you create a manual configuration for the CP and disable the Autonegotiation
option, the automatic negotiation of the network settings (Autonegotiation) is no
longer effective.
If, on the other hand, the communication partner works with autonegotiation, no
communication will be established.
Only use manual configuration when the communication partner works with the
same manually set configuration.
B−36
CP 443-1 for Industrial Ethernet / Manual Part B
C79000-G8976-C223−06
Release 07/2010