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4.3 Normal Operation
With no alarms or troubles in the system, the display message is System All Normal along with the
current time and date as shown below. To set the time and date, refer to the appropriate section in
this manual.
The MS-9050UD performs the following functions at regular intervals while in Normal mode:
Monitors AC input voltage and battery voltage
Monitors and reports status of SLC loop, option cards and control panel
Polls all devices on the SLC loop and flashes each device LED while checking for valid
replies, alarms, troubles, etc.
Refreshes LCD display and updates time
Scans control panel keypad for key presses
Performs autotest for all SLC devices
Tests memory
Updates and reads all communications busses (EIA-485, EIA-232, etc.)
4.4 Trouble Operation
With no alarms in the system, the detection of a trouble will cause the following:
•
The piezo to pulse 1 second On and 1 second Off
•
The system Trouble LED to flash one second On and one second Off
•
The trouble relay to activate
•
TROUBL with device type, noun/adjective, address and trouble description will appear on
the LCD display
•
The same message, along with the time and date, is sent to the optional printer and the history
buffer.
•
Communicate the trouble conditions to the Central Station
•
Terminate upload or download communications
Note that specific troubles will initiate additional actions; for example, loss of AC power will turn
off the AC Power LED, etc.
MS-9050UD PN 52413:C 01/23/08
SYSTEM ALL NORMAL
10:00A 092105
Operating Instructions
149
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