Siemens SIMATIC NET PROFIBUS manual Overview of the Simatic NET System

PROFIBUS NETWORKS

SIMATIC NET

With SIMATIC NET, Siemens provides an open, heterogeneous communication system for various levels of process automation in an industrial environment. The SIMATIC NET communication systems are based on national and international standards according to the ISO/OSI reference model.

The basis of such communication systems are local area networks (LANs) which can be implemented in one of the following ways:

SElectrically

SOptically

SWireless

SCombined electrical/optical/wireless

SElectrically, intrinsically safe

1.1.2Overview of the SIMATIC NET System

SIMATIC NET is the name of the communication networks connecting SIEMENS programmable controllers, host computers, work stations and personal computers.

SIMATIC NET includes the following:

SThe communication network consisting of transmission media, network attachment and transmission components and the corresponding transmission techniques

SProtocols and services used to transfer data between the devices listed above

SThe modules of the programmable controller or computer that provide the connection to the LAN (communications processors “CPs” or “interface modules”).

To handle a variety of tasks in automation engineering, SIMATIC NET provides different communication networks to suit the particular situation.

The topology of rooms, buildings, factories, and complete company complexes and the prevalent environmental conditions mean different requirements. The networked automation components also make different demands on the communication system.

To meet these various requirements, SIMATIC NET provides the following communication networks complying with national and international standards:

PROFIBUS Networks SIMATIC NET	1-3
6GK1970-5CA20-0AA1 Release 2 05/2000