Unimode 400 Operations PN 50709:A 10/20/97 5
3. Operating Modes

Normal Operation

The system operates in Normal mode when no alarms or troubles exist. In Normal
mode, the control panel displays a system message as follows:
Figure 3 All Systems Normal Message
In Normal mode, the control panel does the following functions at regular intervals:
•Polls all Signaling Line Circuit (SLC) devices and the four NACs to check for valid
replies, alarms, troubles, circuit integrity, and so on.
•Checks power supply troubles and batteries every 10 seconds.
•Sends a supervisory query on the ADT-LCD-80 and verifies proper response.
•Refreshes the LCD and the optional ADT-LCD-80 display and updates time.
•Scans the keypad for a System Reset or an Enter key press.
•Performs a detector automatic test operation.
•Tests system memory.

Trouble Operation

The system goes into Trouble mode when the control panel detects an electrical or
mechanical fault. With no alarms, a control panel in Trouble mode does the following:
•Produces a pulsed audible tone;
•The System Trouble LED flashes;
•The trouble relay activates (MPS-400, TB5); and
•Sends a message to the LCD display, an optional ADT-LCD-80, an optional
printer, and the history file.
Figure 4 shows a typical Trouble message:
Figure 4 Trouble Message
Note: M500CH modules report
both open and short circuit
messages.
1. Press <Acknowledge/Step> to silence the panel sounder and switch the System
Trouble LED from flashing to steady—regardless of the number of troubles,
alarms, and supervisory signals.
2. Pressing <Acknowledge/Step> while at least one new alarm or trouble exists,
causes the control panel to send an Acknowledge message to the history file and an
optional printer.
YOUR CUSTOM FORTY CHARACTER MESSAGEHERE
ALL SYSTEMS NORMAL11:30A TUE 02/11/97
TROUBL PULL STATION I.C.U. WEST WING
Z1 INVALID REPLY 11:45PM TUE 02/11/97
Custom descriptor for this
device location
Type of device
Software zone
assigned (Zone 1)
Time and date
Type of event (trouble)
Type of trouble