Figure 4.2 Typical alarm parameters in PICUS
# Parameter Range Notes
1 Set point Varies
The setting at which the alarm is triggered.
Must be considered with Trigger level setting.
2 Reset hysteresis Varies See Reset hysteresis for more information.
3 Delay Varies Delay before the alarm becomes active.
4 Trigger level (fixed)* High, Low Whether the alarm is triggered at a High or Low setting.
5 Auto acknowledge
Not enabled,
Enabled
If Enabled the alarm is automatically acknowledged when it occurs.
6 Alarm test
Start test, Stop
test
Selecting Start test starts an alarm test for the selected protection.
CAUTION
Starting an alarm test also activates the alarm action.
Selecting Stop test stops the alarm test for the selected protection.
7
Additional alarm
information
Varies Shows additional information about the state of the alarm.
8 Suppress action
Not enabled,
Enabled
If Enabled the alarm action is suppressed. The alarm message will appear
in the alarm list.
9 Latch
Not enabled,
Enabled
If Enabled the alarm is latched when it occurs and requires both
acknowledgement and reset (unlatch) to clear.
10 Enable
Not enabled,
Enabled
If the alarm is enabled or not enabled in the controller.
DESIGNER'S HANDBOOK 4189340911K UK Page 95 of 521
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