Notifier NFS-320 Operation Manual

Also see for NFS-320: Installation manual

Contents

Notifier NFS-320 Operation Manual Manual pdf 32 page image

32 NFS-320/E/C, NFS-320SYS/E Operations Manual — P/N 52747:E1 06/16/2011Operation of the Control Panel Operation of Special System Timers3.12.4 How to Respond to a NAC or Control/Relay TroubleIf the control panel indicates an active NAC or Control/Relay Trouble, take the following action:1. Press the ACKNOWLEDGE /SCROLL DISPLAY key to silence the panel sounder and switch theSYSTEM TROUBLE LED from flashing to steady—regardless of the number of troubles, alarms,and supervisory signals.2. The control panel sends an Acknowledge message to the History buffer and installed printers,FDU-80 annunciators, and CRT-2s. Check the trouble message for the location and type oftrouble.3. Correct the condition causing the trouble.4. When the trouble condition is corrected, the panel will return to normal operation (indicated bythe “System Normal” message).5. The control panel sends a “System Normal” message to the LCD display, History buffer andinstalled printers, FDU-80 annunciators, and CRT-2s.3.13 Operation of Special System Timers3.13.1 What are System Timers?There are user-programmable time delays for three specific functions: the Auto Silence Timer, theAlarm Verification Timer, and the Silence Inhibit Timer. Figure 3.3 shows a sample SystemFunction Selection screen with system timer settings. For instructions on changing systemfunctions, refer to the NFS-320 Programming Manual.3.13.2 How to View System Timer SelectionsYou can use the Read Status Entry option (explained in Chapter 4) to view the current selection forthe System Timers. To do so, press the keys shown below in sequence:The LCD display shows the current selections for System Functions, which includes the threesystem timers. Sample LCD display of a System Function screen with system timer selections:Figure 3.3 Sample System Function Selection Screen3.13.3 How System Timers WorkThe control panel can operate with special system timers: Auto Silence Timer, Alarm VerificationTimer and Silence Inhibit Timer.Auto Silence TimerA timer that functions like pressing the SIGNAL SILENCE key. When the Auto Silence Timer reachesits programmed value (600-900 seconds), the control panel automatically shuts off all activeoutputs programmed as silenceable.Silence Inhibit Timer set to 180 secondsAuto Silence Timer set to 600 secondsAlarm Verification Timer set to 30 secondsS I L I N H = 1 8 0 A U T O = 6 0 0 V E R I F Y = 3 0 U S A T I M ET E R M = N A C - D L Y = Y L o c T B L I N K = 0 1 S T = 4 A C S = N