• »System update delay timer«:
•
A timer of 30 second that starts after the System Update order was triggered.
• »System update active«:
•
This flag is active while the System Update delay timer is running.
• »System update monitoring«:
•
After the System Update function was triggered and is finished, the saved
constellation is monitored in regards of any change.
• »System update alarm«:
•
Occurs if an additional device is recognized that does not exist in the actual saved
constellation. See Alarmlist for more details.
• »Missing Member alarm«:
•
Occurs if a device is not recognized but exists in the actual saved constellation. See
Alarmlist for more details.
With the System Update order, a delay timer of 30 seconds is triggered and will be sent to
all other members on the load share and control bus. During this time the System Update
and missing member monitoring is disabled to not interrupt a well working plant by
upcoming alarm messages and control reactions on them due to shutting down a device
for maintenance. Short before the delay timer ends, the System Update function saves
the actual constellation of recognized devices.
During the delay time the LogicsManager flag 04.65 System update active is active.
NOTICE!
A change of the device ID or of parameter »9924 Load share Interface« will reset the
saved constellation and a new System Update order needs to be triggered.
After the System Update function is finished, the saved constellation will be monitored.
Any deviation to this constellation will be recognized and noticed by an alarm that
describes the type of change.
A missing member alarm is shown if a device, of the saved constellation, is not
recognized anymore. If an additional device is recognized, that does not exist in the
saved constellation, a System Update alarm is shown, see
expressions and their meaning:”
Each Alarm is also available as flag for the LogicsManager system.
To configure the »System update« Monitoring see
╚═▷ “4.5.6.18 Multi-Unit System
By default the Missing Member alarm is incorporated into the frequency droop
LogicsManager
695
easYgen-3000XT Series
B37574
6 Application Field
6.2.2.1 System Update
Released