ABB Navigator 600 Silica User Manual page 37

Navigator 600 Silica
Single-stream
There are six tabs in the Alarm Relays screen, one for each alarm:
Fields
Alarm Source
If 'Alarm Source' is set to Stream X, additional fields appear:
Alarm Type
Alarm Tag
Trip
Hysteresis
Fail Safe
Log Enable
IM/NAV6S/SS–EN Rev. E
Description
Each of the six alarms can be configured independently to one of the following sources:

None – no other fields are visible

Stream 1

Cleaning in progress
If 'Alarm Source' is set to Stream X, the alarm type can be set to:

High / Low process – see Fig. 5.3, page 34.

High / Low latch – see Fig. 5.4, page 34.

High / Low annunciate– see Fig. 5.5, page 34.

Out of sample – the alarm state is active if an out-of-sample condition occurs in the selected
stream source.
The Alarm identification tag – up to 20 characters.
The value at which the alarm is to activate (0 to 5000 ppb).
When an alarm trip value is exceeded, the alarm does not become active until the time hysteresis
value has expired. If the signal goes out of the alarm condition before the time hysteresis has expired,
the hysteresis value is reset – see page 34 for hysteresis actions.
The hysteresis value is set in concentration units (0 to 5000 ppb), and the hysteresis time is set in
seconds (0 to 5000 s).
If set to 'Yes' the alarm relay is normally energized and is de-energized when an alarm condition
occurs.
If set to 'No' the alarm relay is normally de-energized and is energized when an alarm condition
occurs.
If set to 'On' all changes in the alarm state in the Alarm Event log are recorded – see Section 9.5.2,
page 57.
5 Configuration
35