F e a t u r e s , C h a p t e r 5
Wa t l o w P o w e r S e r i e s
■
5 . 7
Alarm Standard
If an alarm is configured as “standard”
[`Std]
, the
alarm indicators only occur while the alarm is active.
The alarm indicators are the relay, which state is set in
Active Relay State
[ALgc]
as either energized on
alarm or de-energized on alarm, and the display, which
has an indicator LED in the upper display and the
descriptive prompt for the active alarm. When the
alarm becomes inactive (and no other alarms are
active) the alarm indicators are turned off.
Alarm Latched & Unlatching an Alarm
Indicator
If an alarm is configured as “latched”
[`Lat]
, the
alarm indicators remain active until the user deacti-
vates them. For a latched alarm, the descriptive
prompt on the display in the Display Loop will read
[`Lat]
, and the user can switch to
[UnLA]
, if the
alarm is cleared, to turn off the alarm indicators.
Once alarm indicators have been turned off, the
operator does not have to reconfigure an alarm as
latched.
Alarms
An alarm takes some action, usually notifying an
operator, when a control parameter leaves a defined
range. A user can configure how and when an alarm
is triggered and whether it turns off automatically
when the alarm condition is over. A description of
the alarms and errors, why they occur, and how to
troubleshoot them can be found on pages A.4 - A.7.
Setup Page:
• Enter the Setup Page holding
± ¬
for 2 seconds.
• When the display reads
[algo]
, press
Î
until
[`alr]
[`set]
[`set]
is displayed.
Global Alarm Configuration
The Global Alarm Configuration
[glbl]
is used
when all of the alarms in the system are to be
configured in the same mode. If individual alarms
need to be set to different configurations, the Global
Alarm Configuration should be set to
[`OFF]
.
Alarm Silencing
If an alarm is configured as “silenced”
[`sIl]
, the
relay does not activate on the active alarm, although
the display indicators are still visible. When the
alarm becomes inactive (and no other alarms are
active) the display alarm indicators are turned off.
Alarm Latched and Silenced
If an alarm is configured as “latched and silenced”
[lasI]
, only the display alarm indicators are active
until the user deactivates them. The alarm displays
must be switched off once the alarm has been
cleared. See unlatching an alarm indicator above.
Active Relay State
For maximum flexibility, the Power Series controller
can generate alarms from the energized or de-ener-
gized state of the relay. Creating an alarm from the
de-energized state of the relay is the most reliable
method of alarm generation since a power loss or
any other control malfunction would cause an alarm.
Summary of Contents for PC1X-F20
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