Hierarchical And Flat Systems; Single-User And Multi-User Systems - ABB MicroSCADA Pro SYS 600 Technical Description

SYS 600 *9.0
Fig. 2.3.-1 An overview of the MicroSCADA system
2.3.1.
2.3.2.
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MicroSCADA Pro
System Overview
Technical Description

Hierarchical and flat systems

The difference between a hierarchical and a flat system is that a hierarchical system
has several layers of system components, while a flat system has only one. The
hierarchical system contains a multi-user system or a redundant system that is
connected to one or more single-user systems through a serial line. A flat system
could be, for example, a single-user system and a SYS 500 connected to the process
units.

Single-user and multi-user systems

Both the single-user system and the multi-user system contains SYS 500. The
single-user system has one local MicroSCADA monitor and NET unit. A modem
may be used for communication with process units. In a multi-user system one or
several operator workstations are connected to SYS 500 (usually through LAN). A
communication front-end may also be connected to the system. The communication
front-end increases the number of communication lines.
The NET unit that is connected to the single-user system increases the amount of
available protocols and COM ports. It also eases the load of the base system
computer.
More information on SYS 500 can be found in Chapter 3.
1MRS751852-MUM
system