1
System Overview
1.1
Areas of Application
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 1
1.2
Regulations for Applications Requiring Official Approval
. . . . . . . . 1 - 1
1.3
System Components
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 2
1.3.1
Power Supply
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 2
1.3.2
Central Processing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 3
1.3.3
Input and Output Modules
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 3
1.3.4
Intelligent Input/Output Modules and
Communications Processors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 4
1.4
Expansion Capability
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 4
1.4.1
Centralized Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 4
1.4.2
Distributed Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 4
1.5
Communications Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 5
1.6
Operator-Process Communication, Process Visualization,
and Programming
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 6
1.7
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 6
1.8
Redundancy Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 7
1.8.1
Hardware
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 7
1.8.2
Operating System - Additional Tasks
. . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 8
1.8.3
Control Programs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 8
1.8.4
Programmer Functions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 - 8
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EWA 4NEB 811 6148-02