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3. Operation of the Control Panel Active Supervisory Signal Mode of Operation

30 NFS-640 Operations Manual P/N 51334:B 10/03/2003

If Non-latching Type Code Displays

Some Supervisory Type Codes do not latch the control panel. (Refer to Table 6 for a list of these type

codes). The control panel automatically returns to normal operation, when you correct the condition that

activates the supervisory point. If the control panel indicates a non-latching supervisory point, take the

following action:

Note: If a fire alarm exists, and there are silenced alarms (the SIGNALS SILENCED LED is lighted), a Supervisory alarm

will resound the panel sounder.

1. Press the ACKNOWLEDGE/SCROLL DISPLAY key to silence the panel sounder and switch the

SUPERVISORY LED from flashing to steady—regardless of the number of troubles, alarms, and

supervisory signals. The control panel sends a Supervisory message to the History buffer and

installed printers, terminal mode LCD-80s, and CRT-2s.

2. Correct the condition that activated the supervisory point.

3. The control panel automatically returns to normal operation (indicated by the “System Normal”

message) and the control panel sends a “System Normal” message to the LCD display, History

buffer and installed printers, terminal mode LCD-80s, and CRT-2s.

How to Interpret Supervisory Type Codes

The Type Code that displays in the Supervisory message indicates the function of the point that initiates

the Supervisory. For example, a monitor module with a

TAMPER Type Code means that the monitor

module connects to a tamper switch.

Type Codes that can appear in an Supervisory message:

Table 6 Supervisory Type Codes

Monitor Modules

Type Code

Latching

(Y/N)

Purpose What it does

WATERFLOW S Y Indicates supervisory condition for activated waterflow switch Lights SUPERVISORY LED and activates CBE

RF SUPERVSRY N Monitors a radio frequency device Lights