*
Supervision application objects
*
Supervision monitoring
Supervision application objects contain the source for supervision information to be
displayed by supervision monitoring in a supervision display.
2.5. Event handling
An event is an indication that something has happened in the system. Typical events
are changes of object values, alarms or warnings, or alarm definitions. Events can
cause printouts, automatic control operations, event lists and report database
registrations.
The event list displays events that have occurred in the system. It also informs about
activities by other users, operations of objects, acknowledging alarms, editing of
limit values and so on. With LIB 500 you can define own filters with the event list
tool, depending on what kind of information you want in the event list. One or
several criteria may be used to filter out unwanted information from the event list.
2.6. Alarm handling
Alarms are generated when something special has occurred in the process. Alarms
can cause audio-visual alarms, changes in the station picture, alarm pictures, alarm
printouts and alarm lists. Information about alarming objects is stored in the alarm
buffer. The information remains in the buffer until the reason for the alarm
disappears or until the alarm is acknowledged.
The alarm list shows all the alarms that appear in the system alarm buffer. The alarm
list is divided into two different lists: one with persisting (active) alarms and one
with fleeting (inactive) alarms. An alarm is usually presented with a text that
explains the reason of the alarm.
Alarms and events can be generated in three different ways:
*
Process events can generate alarms. The state of the process is evaluated in the
base system, according to the limits that have been set. For example, if a
measured value exceeds the predefined limits, an alarm will occur.
*
The system itself can generate internal alarms from diagnostic programs, which
supervise the MicroSCADA Pro system components. An alarm will occur, if
there are system communication errors, e.g. if a printer error occurs.
*
System alarms are generated by an external module. This module can be
considered as a system watch dog. System alarms of this type cannot be included
in the alarm list.
Other devices in the MicroSCADA Pro system can also generate alarms.
18
SYS 600 9.2SYS 600 9.2
MicroSCADA Pro
System Configuration
Configuration Manual
1MRS756112
(26 paginas)
(21 paginas)
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