Siemens MKB-1 Operating Instructions Manual page 8

Modes Of Operation
Normal Mode
Alarm
Alarm Annunciation
Siemens Building Technologies
Fire Safety
The MXL alphanumeric display annunciator has five modes of operation:
1. Alarm
2. Supervisory
3. Trouble
4. Security
5. Normal
This order ensures that alarms always take priority over all other conditions. In turn,
supervisories always take priority over troubles and troubles always take priority over
security conditions. All of the above modes take priority over Normal mode.
Normal mode is the absence of any alarms, supervisories, troubles, or security
conditions.
In Normal mode, the display will look similar to the one shown in Figure 2 on page 2.
The POWER LED glows steadily in Normal mode when the System has AC power.
The ALARM, AUDIBLE SILENCE, SUPERVISORY, TROUBLE, SECURITY, and
PARTIAL SYSTEM DISABLE LEDs are off and the internal audible is off.
If your System has the printer option, the System prints a message in the following
format every day at midnight, even when there are alarms or other conditions:
System Status at 00:00:00 Oct 02, 20
0 ALARM
0 SUPERV
0 TROUBLE
0 SECURITY
Responding to an Alarm
Follow the response plan approved by the local authority having jurisdiction.
When the MKB is installed, the ACKnowledge key and audible Alarm Silencing key
(AUD SIL) on the MKB are behind a locked door. To acknowledge an alarm or trouble,
or to silence an audible alarm, first unlock and open the door.
When a fire is detected, the System causes the ALARM LED on the MKB to flash,
the System's internal audible to sound and the display on the MKB to display the
event in the format shown in Figure 5. When the country setting is US, the AUDIBLE
SILENCE LED flashes.
0 ALARM ACK
0 SUPERV ACK
0 TROUBLE ACK
0 SECURITY ACK
8 P/N 315-048692-2