Siemens S7-300 - Page 77

Configuring the Ethernet CP with STEP 7
3.6 Assigning addresses the first time
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
77
Variants and recommendation for the address assignment
There are 3 ways of making this address assignment in STEP 7:
● Addressing by selecting the target system in the SIMATIC Manager
This variant allows the address assignment without needing to create a STEP 7 project.
This, for example, is useful if you want to download configuration data created offline to
the S7 station.
This variant is described in section
.
Addressing by selecting the target system (Page 78).
● Addressing by adopting the configured address parameters
This variant assumes a CP networked in STEP 7. The advantage of this method is that
the IP parameters specified during networking in STEP 7 are adopted directly.
In an initial step, you assign the CP the previously configured IP address and the IP
parameters of the Ethernet or PROFINET interface.
Only then can the configuration data be downloaded to the CP using a PG/PC via
Ethernet.
This variant is described in section
.
Addressing by adopting the configured address
parameters (Page 78).
● Downloading configuration data using the ISO protocol
Another variant is to download configuration data with a defined IP address using the ISO
protocol; this applies to CPs that support the ISO protocol. In this case, you address the
CP using its MAC address.
Requirement
To be able to address the CP as described here, the CP must be available online; in other
words:
● The connection to the Ethernet LAN must be established; there must be no subnet
transition (router) in between.
● The Ethernet interface of your PG/PC must be available from within STEP 7.
Note
The options for assigning addresses as described here, are only possi
ble with a module
that can be reached via a default MAC address; to allow this, the module must support
the PST function (Primary Setup Tool). For more information, refer to the relevant device
manual
/1/ (Page 227).
With older CPs (CPs with a firmware version < V3) with an additional gigabit interface, the
PST tool can only be used on the PROFINET interface.