Ericsson TT1222 Guia do Utilizador Página 65

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Alarms/GPOs
6.1 Introduction
This chapter describes the four ways in which the TT1222 may locally monitor the
operational and alarm status:
The front panel status LED provides a summary receiver alarm indication.
The front panel LCD Display provides detailed alarm messages.
The RELAY/GPO connector on the rear panel provides alarm relay contacts that
provide a summary receiver alarm indication, which may be used to trigger an
external device.
The RELAY/GPO connector on the rear panel provides 5 General Purpose
Outputs (GPOs) configurable relay contacts, which may be used to trigger
external devices.
6.2 Status LED
The front panel status LED, located between the display and the keypad, has two
conditions:
Red indicates an alarm state.
Green represents no alarm.
The summary alarm state is user-configurable so that alarm conditions may be
ignored, if required (see 6.4.2 Configuring Alarms). The conditions for the red LED
alarm also corresponds to the summary alarm relay.
6.3 LCD Display Status Messages
The operational status of the unit can be viewed using the front panel LCD Display.
This is the default display for the LCD. The current alarm state is shown in the
second line of the display.
If no alarms or warnings are active, the status display (if the LCD is in its default
mode) will display “System: OK”.
If several conditions exist, the most severe (alarm) is displayed, e.g. “Video: Err in
stream”. If no alarms are present in the system, the top most warning will be
displayed. When the receiver is in a WARNING or ALARM state, the easiest way for
the user to diagnose the alarm condition is via the STATUS menu.
Table 6.1: Navigating the Alarm Status Menus
Step Action Result
1.
Go to the ALARM menu, located
under the STATUS ALARM.
The display will read “STAT:ALARM” on the
top line.
EN/LZT 790 0002/2 R1A
6-3
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