1MRS751852-MUM
SYS 600 *9.0
21
MicroSCADA Pro
System Overview
Technical Description
Application objects include, for example, the following types:
3.5.1.2.
System objects
System objects are programmable units that define the configuration and
communication in a MicroSCADA system. There are two kinds of system objects:
base system objects and communication system objects. These two kinds of objects,
define the MicroSCADA system configuration together with the PC-NET unit
configuration data. With SCIL, system objects are accessed through their attributes.
• Scales
Algorithms for changing values from the process units to values that are
used in the base system. The algorithms may be one-to-one, linear or
stepwise linear. Several process objects may use the same scale.
• Data objects
These register and store sampled or calculated data. Every registered
value has a time stamp and a status code which describes the value
quality. Data objects are used for storing trends, energy value history,
system configuration data, optimisation, calculation, estimations of
energy values etc.
• Command procedures
These are SCIL programs that can be executed automatically or
manually. They can be used for all kinds of automatic operations like
calculations, control operations, report printouts, configurations etc.
They are used e.g. for automatic operations at system start-up.
• Time channels
Time channels are used e.g. for starting programs or data registrations
automatically. Actions are started based on time definitions (e.g. one
hour). A time channel can start several actions. If the same channel
starts several actions, they are started in priority order. A time channel
is generally activated at predefined times, either at a certain time or at
specified intervals.
• Event channels
Event channels are used for automatically starting data registration and
program execution or activating time channels. They are typically
activated after process events, which appear as changes in the process
object values. The event channels transmit information on process
events from the process database to report database where they
activate operations.
• Event objects
Event objects start automatic updating in pictures, based on events.
The event objects can be activated automatically or manually. They
have no attributes.
• Variable objects
Variable objects are temporary lists of attributes and attribute values,
used in SCIL programs.
• Process objects
Process objects are real-time images of process units, such as
breakers, disconnectors, switches, relays, detectors, sensors or
controllers. They store information related to the process.
Generally, each input and output connection in process units is
represented by a process object in a process database. These are
organised in groups. A group consists of a number of indexed process
objects with the same logical name. The objects are typically related to
the same process unit.
Most of the process database functionality is based on process objects.
They supervise signals from process units and control signals that are
sent to them. They contain process data, which is the object value, and
various information related to the data. Attributes store the related
information.
