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Siemens Standard application AHU CE1P3977en_02
Building Technologies Alarming 01.02.2010
19 Alarming
19.1 General
This chapter deals with the following topics:
• Alarms.
• Alarm list.
• History list.
• Acknowledge alarms.
• Reset alarms.
• Alarm and history list may include a maximum of 50 entries.
• Each alarm is reported in clear text, notification class, alarm group, date and
time.
• Each new alarm generates a line in both the alarm list as well as the history list.
• Active alarms:
– The alarm LED flashes on the external HMI.
– The alarm bell symbol rings back and forth in the in-built HMI.
• An acknowledge, but still active alarm:
– The alarm LED is lit on the external HMI.
– The alarm bell symbol is still in the in-built HMI.
• Reset alarms:
– Alarm list: Line is deleted.
– History list: Display of going alarm.
Workflow for unsaved alarms:
Workflow for saved alarms:
Principles
Save and unsaved alarms
Alarm button function
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 222
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