Specifications

FCD-E1LC Installation and Operation Manual Chapter 6 Troubleshooting and Diagnostics
Handling Alarms 6-5
Alarm Display
FCD-E1LC displays alarm messages on the supervision terminal. There are two
types of alarms, designated as ON/OFF and ON:
• An ON/OFF alarm is a state alarm: it is displayed only when the alarm
condition is present, and is automatically removed when the condition is
cleared (if the alarm is being displayed, it will disappear only when the display
is refreshed by scrolling).
• An ON alarm is an event alarm: it records the occurrence of event and
therefore it persists even after the event that caused the alarm condition is
cleared.
When an ON/OFF-type alarm changes its state from ON to OFF, it is not removed
from the alarm buffer. The state change is indicated by a new message, which
added to the alarm buffer.
³ To display the alarm history:
• Type DSP ALM.
The terminal displays the alarms stored in the buffer (up to 100), listing for each
alarm its number, the alarm message, its state (ON or OFF), and the time and
date when the last change in its state occurred. A typical display looks like this:
ALARM 21 SIGNAL LOSS ON 01:42:11 2001-01-01
ALARM 25 LOCAL SYNC LOSS ON 01:45:14 2001-01-01
³ To clear the alarm buffer:
• Type CLR ALM /CA.
Alarm Messages
Table 6-2 presents the alarm messages displayed on the FCD-E1LC control
terminal in ascending order of their numbers, and lists the actions required to
correct the alarm condition.