5 Performance Data / Operation
B−30
CP 443-1 for Industrial Ethernet / Manual Part B
Release 07/2010
C79000-G8976-C223−06
5.7 Characteristic data of the integrated 2-port switch
Learning addresses / deleting addresses (aging time)
The switch integrated in the CP reads the source addresses included in the data
packets. The switch therefore learns the addresses of the end devices connected
via a port.
If the switch receives a data packet, it directs this packet only to the port via which
the appropriate DTE can be obtained.
The switch monitors the age of the learned addresses. Addresses that exceed the
“aging time“ are deleted. The aging time is 5 minutes.
Ports can be deactivated individually
The ports of the switch integrated in the CP can be deactivated individually in
STEP 7 / HW Config. This can, for example, be used for service purposes.
To do this, open the properties dialog of the relevant port and select the “disabled”
setting under “Options > Transfer medium / duplex”.
The port is turned off completely when it is deactivated. The corresponding LED on
the device (for example P1) is then turned off.
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