System Description; Communications In Industry; Hierarchy Levels In The Computer-Integrated Automation Network - Siemens SIMATIC S5 Manual

S5-95U, SINEC L2
1

System Description

In this chapter, you will learn the following:
• The applications that the SINEC L2 network is suited for
• The performance capabilities that the SINEC L2 network is equipped with
• The operation principle of the SINEC L2 network
• The explanation of important basic terminology and parameters
• The types of data transmission that are possible and which criteria you use to select them
• The transmission physics that can be used
1.1

Communications in Industry

In today's modern production control systems, the installations for process automation operate in an
information network that can be organized into several hierarchy levels, as illustrated in Figure 1-1.
Cell
bus
Field
bus
Figure 1-1. Hierarchy Levels in the Computer-Integrated Automation Network
The following sections explain the different tasks of each of the hierarchy levels.
EWA 4NEB 812 6112-02
Factory
e.g.
bus
SINEC H1
Process e.g.
bus SINEC H1
e.g. SINEC L2
e.g. SINEC L2
Planning level
mainframe e.g. SNI MX, DEC VAX
Process supervision level
PLC AND IPC,
e.g. SIMATIC S5 and SICOMP M
Cell level
PLC AND IPC,
e.g. SIMATIC S5 and SICOMP M
Field level
sensors, actuators

System Description

1-1