User's Manual

ISO 9001:2000 Cert. N°4500/1
Version 1.1 SDT_ARK6_User_Manual_ENG_vATSC Page 185 of 206
7.4.2 Thresholds Table
The alThresholds subtree is used to set alarms thresholds. altNumber object specifies the total number of entries
in the alarm thresholds table. Each entry in the table is defined as follows:
AltEntry ::= SEQUENCE {
altIndex INTEGER,
altDescr DisplayString,
altAlarmCode INTEGER,
altMeasUnit MeasureType,
altSetting INTEGER
}
altIndex is the index of the specific entry.
altDescr object provides a textual description of the specific entry (refer to Alarm Thresholds Description table
for the complete list of thresholds descriptions).
altAlarmCode object univocally identifies the alarm this threshold refers to (refer to Alarms Code and
Description table).
altMeasUnit object specifies the unit of measurement of the entry.
altSetting object is used to set the threshold.
The thresholds table lists both common and mode-specific alarm thresholds. Indexes of thresholds may change
from one operational mode to another, but alarm codes of the alarms they refer to do not. Alarm codes of
common alarms are the same whatever the working mode. Alarm codes of mode-specific alarms uniquely
identify the specific alarm and are not shared by operational modes.