Siemens SIMATIC NET S7-300 User Manual

6 Programmed Communication Connections
A-162
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Note
Read the description of FB55 IP_CONFIG in Section 7.6.
Configuration Limits
A maximum of 64 connections can be specified in FB55 CP_CONFIG. The most
important factor, however, is the maximum number of connections supported by
the CP type you are using (see /2/).
Special Features / Restrictions
 Consistency check only with STEP 7
The connection configuration in STEP 7 involves consistency checks that are
not possible or only possible with restrictions when using the programmed
configuration!
 Connection configuration required on the partner
When configuring specified connections in STEP 7, you implicitly create the
connection for the partner; with a programmed configuration, this is not
possible! In this case, you must configure suitable connections for the partner.
 DHCP / DNS is supported
IP address assignment is also possible using DHCP/DNS even if you choose
programmed configuration.
 No connection information when uploading
When you upload the S7 station data in STEP 7, this does not contain the data
of the programmed configuration.

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)