Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur télécharger pdf (Page 22)

3 Installation and Commissioning

B−22

CP 343-1 Advancedfor Industrial Ethernet / Manual Part B

Release 06/2008

C79000-G8976-C202-04

Module replacement: Special feature with PROFINET CBA and with IT functions

For PROFINET CBA, the interconnection information is stored on the C−PLUG.

The file system for the IT functions is also stored on the C-PLUG. The following

must therefore be distinguished when replacing a module:

S C−PLUG of the previous module is used

In this case, the CBA interconnection information and the data in the file system

on the C−PLUG are available directly.

Although a diagnostic buffer entry is generated indicating that the C-PLUG

comes from a different device type, you can nevertheless continue to use the

C-PLUG from the GX21 device type in the new device (GX30).

S A new C−PLUG is used

In this case, you will need to reload the configuration with STEP 7 and the CBA

interconnection information with SIMATIC iMap.

Module replacement: Special feature of IP address assignment from a DHCP

server

During configuration of the CP you can specify the IP configuration in the

properties dialog; one option is to obtain the IP address from a DHCP server.

Notice

When replacing modules, remember that the factory-set MAC address of the new

module is different from the previous module. When the factory-set MAC address

of the new module is sent to the DHCP server, this will return either a different or

possibly even no IP address.

Ideally, you should therefore configure IP as follows:

Always configure a client ID if you want to obtain the same IP address from the

DHCP server after replacing the module.

If you have configured a new MAC address instead of the factory-set MAC

address (generally the exception), the DHCP server always receives the

configured MAC address and the CP obtains the same IP address as the replaced

module.

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

ports and not on the gigabit interface.

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Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur Page 22