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5. Configuration
5.7. Block Offnet Diagnostic Alarm
Communication loss
scenario
Behavior of the Block Offnet and Device Offnet System alarms in various
operational scenarios
The following table lists the behavior of the Block Offnet and Device Offnet System
alarms in the various operational scenarios. These behaviors are also dependent on
whether the devices are online or off the network.
Scenario
Inactivating a
Fieldbus Link when
the device is online.
Inactivating a
Fieldbus Link when
the device is off the
network.
Activating a Fieldbus
Link.
Activating or
Inactivating a CM
containing a FF
function block.
Changing the state
236
Experion PKS Series A Fieldbus Interface Module User's Guide
Behavior of Block Offnet Alarm
Summary Display.
Behavior of Block Offnet Alarm
A Block Offnet Alarm is not
reported for each loaded function
block.
Previously reported Block Offnet
Alarms changes from "Active" to
"Disabled" in the Alarm Summary.
Previously reported Offnet Alarms
changes to "Disabled" when the
Link is inactivated in the Alarm
Summary. When activated, these
alarms are regenerated to
indicate the current condition of
the alarm.
If the Offnet condition does not
exist, the previously reported
alarms remain in the Alarm
Summary as "Disabled".
Changing the EXECSTATE
parameter value has no effect on
the alarms reported by Fieldbus
blocks.
Changing the state of a CEE
Honeywell
Behavior of Device Offnet System
Alarm
Summary Display.
Behavior of Device Offnet System
Alarm
A high-priority Device Offnet
System Alarm is reported for the
device.
A high-priority Device Offnet
System Alarm is reported for the
device.
Previously reported Offnet Alarms
changes to "Disabled" when the
Link is inactivated in the Alarm
Summary. When activated, these
alarms are regenerated to indicate
the current condition of the alarm.
If the Offnet condition does not
exist, the previously reported
alarms remain in the Alarm
Summary as "Disabled".
Changing the EXECSTATE
parameter value has no effect on
the alarms reported by Fieldbus
blocks.
Changing the state of a CEE
R400
July 2010
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