Alarms
Alarm signals
If equipment is connected that has lower limits than the system, the alarm levels must
be set accordingly.
If an analog or digital signal exceeds the predetermined alarm level, several things
happen at once:
•
An audible alarm sounds (according to user preference settings).
•
The system enters Pause mode.
•
The valves and other components on the system revert to their default positions.
The Valve Pause Function can be enabled in UNICORN for certain components (air trap,
filter, column 1, column 2) to retain the original valve positions. The system indicator
lights will also indicate alarms.
Alarm test
The alarm buzzer can be tested from the control system using the buzzer test function
Alarms:BuzzerTest.
To test a specific component alarm it is possible to lower the alarm limit for the compo-
nent below the current process value.
Reset alarms
The alarm is reset through the control system by acknowledging the alarm message, or
by using a separate reset function. The process can be started again using the Continue
function in UNICORN, if the situation has been rectified.
More information
All required manuals are available from the Help menu in the UNICORN user interface.
80 ÄKTAprocess Operating Instructions 29-0252-49 AA
3 System description
3.6 UNICORN control system
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