Emerson Rosemount 8800D Series Reference Manual page 174

Reference Manual
000809-0100-4772, Rev FA
NE107 alerts overview
NE107 alert parameters
NE107 has four alert status signals. They are in order from highest to lowest priority:
1. FD_FAIL_ACTIVE
2. FD_OFFSPEC_ACTIVE
3. FD_MAINT_ACTIVE
4. FD_CHECK_ACTIVE
Any of the alert conditions can be user configured to annunciate as any of the four status
signals. Individual alert conditions can also be mapped into multiple status signals.
Alert parameter definitions and factory defaults
Note
All alert conditions are factory assigned to appropriate status signals. Change the
parameter assignment of individual alert conditions only if needed.
Devices are shipped from the factory with all applicable alerts enabled. The factory default
alert conditions reported in each status signal are:
1. FD_FAIL_ACTIVE
a.
b. Open Thermocouple (MTA only)
A FD_FAIL_ACTIVE status signal indicates a failure within a device that will make the device
or some part of the device non-operational. This implies that the process variable may no
longer be available and the device is in need of immediate repair.
2. FD_OFFSPEC_ACTIVE
a.
b. The filter Low Flow Cutoff setting is out of range.
c.
d. The configured fixed temperature is being used in density calculations (MTA only)
e. The ambient temperature is out of range (MTA only)
A FD_OFFSPEC_ACTIVE status signal indicates that the device is experiencing configuration,
flow or temperature conditions that are outside the device operating range. This implies
that the process variable may no longer be accurate. It also implies that if the condition is
ignored, the device may eventually fail.
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Electronics failure
The Low Pass filter setting is out of range.
The filter Trigger Level setting is out of range.
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Alerts
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