Isa Alarm - CARLO GAVAZZI G3800 X015 - CONFIGURATION SOFTWARE User Manual

G 3800 X015 Configuration Software G 3800 X015 Configuration Software G 3800 X015 Configuration Software

2.4.3. ISA Alarm

Description
The purpose of the ISA-Alarm is to serve as a general alarm system acc. to the ISA specifications. The system
supports two operation modes:
1. Standard: An alarm is reset ("Reset") and switched on again manually by push button.
2. Auto reset: An alarm is reset and switched on again automatically after acknowledgement and removal of
the cause of alarm (Normal position of the alarm contacts).
Alarm contacts are generally included in the system through the objects "Passive detector" and "Active
detector". The alarm system is switched on for the first time after downloading of the application when all
alarm contacts are in off-position or the Reset button is activated. The alarm is released when one or several
alarm contacts are activated. The system actuates the activated alarm contact approx. every second and
switches the alarm output on for the set duration.
When the Acknowledgement button has been actuated in the "Standard" operation mode, the alarm contacts
switch from flashing to continuous operation and the alarm output is switched off. At this point of time,
renewed actuation of an alarm contact does not trigger off an alarm. Subsequent acuation of the Reset button
switches the alarm contact off and releases the alarm system.
If the Reset button is actuated before the Acknowledgement button, the system will also switch off the alarm
output, but the alarm contacts will continue to flash. A new alarm is caused by renewed activation of an alarm
contact.
In the operation mode "Auto reset", the alarm system is restarted after acknowledgement and with alarm con-
tacts in off-position.
The status of the alarm contacts can easily be displayed, eg on a panel. This only requires that the output
channels are coded for the same addresses as the alarm contacts. The functionality of the lamps can then be
tested by means of the object "Lamp test".
For giving out alarms, the object "Common siren" can also be used. Further details can be found in chapter
2.4.7.
The various ISA objects are selected under "Function":
Passive detector:
Active detector:
Acknowledgement:
Reset:
34
• Function: General alarm system with inclusion of Passive detector, Active detector,
Acknowledgement, Reset, Lamp test and Alarm siren
• Application: Monitoring of contacts and other alarm sources.
• Select with mouse ("ISA alarm") or short-cut key "A"
Normally
passive detectors. When the contact is activated and a "1"-Signal
consequently transmitted on the Dupline bus, an alarm is started.
Normally
active detectors. When the contact is activated and a "0"-Signal
consequently transmitted on the Dupline bus, an alarm is started.
This object makes it possible to include acknowledgement buttons.
Upon actuation of an acknowledgement button, the alarm output is
reset and the alarm source indication prepared for the resetting
(changing from flashing to continuous operation).
Note: This object must always be configured.
This object is only needed in the operation mode "Standard" and
makes it possible to include a button for resetting the alarm and
restarting the system. This requires prior acknowledgement of the alarm.
open input. This object
closed input. This object
© 2002 Carlo Gavazzi Industri A/S. All rights reserved
October 2002 October 2002 October 2002
makes it possible to
makes it possible to
include
include