Siemens SIMATIC NET S7-300 User Manual

1 Communication via Ethernet CPs in S7 Stations
A-40
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
1.7.4 Network/Project Variant: One Subnet - More Than One
(Sub)Project
Configuration of the System
In complex networked systems, during configuration it is sometimes more efficient
to manage plant sections in different (sub) projects.
The situation can arise that communication takes place over an interproject subnet
and that interproject connections must then also be created.
Example:
S7-400/1
S7-300/3
System section
“Production 1”
S7-300/1 S7 - 300/2
S7-400/2
System section
“Production 2”
Ethernet (1)
Organization in a Multiproject
User-friendly and consistent configuration of such communication is supported in
STEP 7 as of Version V5.2 with the multiproject.
The functions for multiprojects in STEP 7 allow the following:
 Several projects can be managed in one multiproject and edited separately
 Projects can be branched and merged
Two different strategies can be distinguished in a multiproject:
 Several employees work at the same time on a multiproject in a networked
environment. The projects of the multiproject are in different network folders. In
this case, all connection partners are available for configuring connections.
 One employee manages the multiproject centrally. This person creates the
structures for projects (when necessary locally) and contracts individual projects
out for external editing. The central configuration engineer then returns these
projects to the multiproject and synchronizes the interproject data with system
support and where necessary executes the required interproject functions.

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)