Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur télécharger pdf (Page 64)

9 Further Notes on Operation

B−64

CP 343-1 Advancedfor Industrial Ethernet / Manual Part B

Release 06/2008

C79000-G8976-C202-04

9.4 IP configuration

9.4.1 Configured S7 connections cannot be operated if the IP

address is assigned over DHCP

Notice

If you obtain the IP address over DHCP, any S7 connections you may have

configured will not work. Reason: The configured IP address is replaced by the

address obtained over DHCP during operation.

Obtaining the IP address from DHCP is only possible on the PROFINET interface

and not on the gigabit interface.

9.4.2 Detection of double IP addressing in the network

To save you time-consuming troubleshooting in the network, the CP detects double

addressing in the network.

The reaction of the CP when double addressing is detected varies as follows:

S CP during startup

When the CP starts up (after power down or after the initial addressing), the CP

queries its own IP address on the network. If there is a response, the CP does

not start up! The error is indicated by an LED (“STOP with internal error” is

displayed) and an entry is made in the internal diagnostic buffer.

The CP remains in STOP mode.

When you eliminate the cause by removing the device with the same IP address or

changing its address, you must then restart the CP.

S CP in RUN mode

In RUN, the CP also sends this query at intervals of one minute to detect

double IP addresses.

If a double IP address is detected, the CP also reports this via the LEDs (BUSF

LED) and generates an entry in the diagnostic buffer.

The CP remains in RUN mode.

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Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur Page 64