User manual

Magelis B - 21
1. Introduction: Display unit operating concepts
B
 Acknowledgment of alarms
When designing pages, it is possible to define whether the alarm page
should be acknowledged systematically by the operator or not
(obligatory acknowledgment).
The alarm page is acknowledged on the display by pressing ENTER.
The alarm message changes to a steady display.
Depending on the choice made, management of these 2 types of alarm is
as follows:
1 - Alarms, which must be acknowledged (obligatory)
An alarm, which must be acknowledged, remains in the alarm list until it
is acknowledged by the operator, even if the cause of the fault has
disappeared.
Advantage: Picks up transient faults (instability of a discrete sensor, for
example).
2 – Alarms, which can be acknowledged but do not have to be
An alarm, which can be acknowledged but does not have to be,
disappears from the alarm list as soon as the cause of the fault has
disappeared, regardless of whether or not it has been acknowledged by
the operator.
Advantage: The display unit is not monopolized by displays of faults
considered of minor importance to the application.
 Alarm log
The display units can manage a log of the alarm pages. They store the
alarm pages with the text, but without variable values (for more
information, see section Alarm log, Page 41).
XBT ref. Note
N200 No alarm management