Honeywell Fusion4 MSC-L Installation & Operation Manual page 515

Part No.: 4418309_Rev09
Honeywell
Alarm Handling - Alarm Severity
NOTE: Active stream alarms that are not associated with
any arm have no effect on batches and do not drive
alarm indication and/or alarm shutdown outputs.
6.2.5 Date & Time
The Date and Time associated with an alarm indicates the most recent
date and time at which the alarm is activated. In the alarm log it is the
date and time at which the state of the alarm is changed.
6.3 Alarm Severity
The alarm severity is a concept that applies to loading arms. The alarm
severity of a loading arm is the highest severity of the active alarms that
affects the loading arm. The alarm severity is further explained in the
following example.
6.3.1 Setup
Consider the MSC-L that is set-up as follows:
Three product streams P1, P2, and P3.

Three loading arms L1, L2, and L3.

One Device alarm D

Two product stream alarms PS1 and PS2.

6.3.2 Configuration
The streams are configured as follows:
P1 is associated to L1

P2 is associated to L2

P3 is not being associated to any arm

The alarms are configured as follows:
D, a Device alarm with alarm action Display.

PS1, a Product stream alarm on product stream 1 with alarm action

Display.
PS3, a Product stream alarm on product stream 3 with alarm action

Pause & Display.
6.3.3 Scenario
For the above set-up and configuration, assume a sequence of alarm
state changes and observe how it affects the severity is for each of the
loading arms. The initial alarm state of each of the alarms is inactive.
Alarm Change
Fusion4 MSC-L
Installation & Operation Manual
Severity
L1 L2 L3
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