Emerson Rosemount 3051 CF Series, Reference Manual

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normally, updating inputs and outputs and executing algorithms. When the condition is
cleared, an alert is generated with a priority that corresponds to the WRITE_PRI
parameter.
The FEATURE_SEL parameter enables you to select any one of the following: a hardware
write lock, a software write lock, or no write lock capability. To enable the hardware
security function, enable the HARD W LOCK bit in the parameter. When this bit has been
enabled, the WRITE_LOCK parameter becomes read only and reflects the state of the
hardware switch. In order to enable the software write lock, place the hardware write lock
switch in the unlocked position. Then set the SOFT W LOCK bit in the FEATURE_SEL
parameter. Once this bit is set, you may set the WRITE_LOCK parameter to Locked or Not
Locked. Once you have set the WRITE_LOCK parameter to Locked with either the software
or the hardware lock, all user requested writes will be rejected.
2.6.2 MAX_NOTIFY
The MAX_NOTIFY parameter value of seven is the maximum number of alert reports the
resource can have sent without getting a confirmation from the host, corresponding to
the amount of buffer space available for alert messages. You can set the number lower, to
control alert flooding, by adjusting the LIM_NOTIFY parameter value. If LIM_NOTIFY is set
to zero, then no alerts are reported.
2.6.3 Alerts/alarms
The transmitter annunciates alerts as either Plantweb
™
or NE107 Status Signals. All alerts
are configured, masked, and mapped as NE 107 Status Signals. If the control host is
DeltaV
™
version 11.5 or older, alerts are automatically annunciated as PlantWeb Alerts. No
user configuration is needed for this conversion.
The alerts and recommended actions should be used in conjunction with Troubleshooting .
See Resource Block for more information on resource block parameters.
The resource block acts as a coordinator for alerts. Depending on user configuration, each
device will have either three or four alert parameters. If Plantweb alerts are annunciated,
the three alert parameters will be: FAILED_ALARM, MAINT_ALARM, and ADVISE_ALARM. If
NE107 alerts are annunciated, the four alert parameters called status signals will be:
FD_FAIL_ACTIVE, FD_OFFSPEC_ACTIVE, FD_MAINT_ACTIVE, and FD_CHECK_ACTIVE.
Note
NE107 alerts and Plantweb alerts annunciate the same diagnostics and display the same
recommended actions. The only difference in the alerts reported is the parameters or
status signals used to annunciate the alert conditions. The default factory configuration
has NE107 alerts enabled.
Alerts processing within the device
Procedure
1. Diagnostics perform comprehensive checks and update status within the device.
These status conditions allow you to troubleshoot probable causes and take
corrective actions.
Reference Manual Configuration
00809-0100-4774 July 2020
Reference Manual 27