Siemens SIMATIC NET S7-300 User Manual

3 Operating the Ethernet CP with
A-83
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
3.4 Assigning Addresses for the First Time (Applies to
Latest CPs)
Meaning of the Address Assignment - MAC Address and IP Address
The CP ships with a factory-set MAC address. Without further configuration, the
device can only be accessed over the Ethernet port using this MAC address.
In its original state, you can already use the following functions via the CP using
the ISO protocol and the factory-set MAC address:
 Download the defined configuration to the CP or CPU
 Run diagnostics on the CP or CPU
Before you can download defined configuration data to the device using an IP
address, you must first assign an IP address to the CP.
Assigning the Address - Options and Recommendations
There are three ways of assigning this address in STEP 7:
 Addressing by selecting the target system in the SIMATIC Manager
This option allows you to assign the address without having to set up a STEP 7
project. This is useful, for example, if you want to download defined
configuration data you created offline to the S7 station.
This is described in Section 3.4.1.
 Addressing using the properties dialog in HW Config or NetPro
This option assumes that the CP was networked in STEP 7. The advantage of
this method is that the IP parameters set during configuration in STEP 7 /
NetPro can be used.
In the “Addressing” tab, you assign the previously configured IP address and IP
parameters to the CP.
This is necessary before the configuration data can be downloaded to the CP
over Ethernet.
This is described in Section 3.4.2.
 Downloading configuration data using the ISO protocol
A further variant is to download project engineering data with a defined IP
address over the ISO protocol (see above); this applies to CPs that support the
ISO protocol.

Siemens SIMATIC NET S7-300 Specifications

General

Product Type Designation	SIMATIC NET S7-300
Mounting	DIN rail mounting
Protection Class	IP20
CPU Models	Various models available (e.g., CPU 312, CPU 314)
Communication Interfaces	MPI, PROFIBUS DP
Power Supply	24 V DC power supply required. Different power supply modules available.
I/O Modules	Digital input modules, digital output modules, analog input modules, analog output modules
Programming	STEP 7 software
Supply Voltage	24V DC or 120/230V AC (depending on model)
Digital Inputs	Available via digital input modules
Digital Outputs	Available via digital output modules
Analog Inputs	Available via analog input modules
Analog Outputs	Available via analog output modules
Communication Functions	MPI, PROFIBUS DP, Ethernet (depending on model)
Protocols	MPI, PROFIBUS DP, TCP/IP (depending on model)
Operating Temperature	0°C to 60°C
Storage Temperature	70 °C
Memory	Depends on CPU model (e.g., 32 KB to 1.5 MB)