Process Units - ABB MicroSCADA Pro SYS 600 Technical Description

SYS 600 *9.0
4.6.
42
MicroSCADA Pro
System Overview
Technical Description

Process units

Process units are devices in the process. They collect data from the process and
execute orders from the base system. Process units can, be for example, REx, SPA,
or LMK device or RTU. The process units are handled as stations inside the
MicroSCADA system. The concept RTU was also previously used for the process
unit.
Process units can be divided into primary devices and secondary devices. Process
devices are called primary devices. The devices needed for automation are called
secondary devices. For example, breakers and disconnectors are primary devices
and relays are secondary devices. See Figure 4.6.-1.
Fig. 4.6.-1 An example of equipment used for process automation. The secondary
equipment is used to enable the automation. All the devices with which
the MicroSCADA base system communicates directly are called
stations.
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