Emerson Rosemount 5900C, Справочное руководство

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4.11.7 Alarm priority
Alarms are grouped into five levels of priority:
Table 4-8: Alarm Levels of Priority
Priority number Priority description
0 The alarm condition is not used.
1 An alarm condition with a priority of 1 is recognized by the system, but is
not reported to the operator.
2 An alarm condition with a priority of 2 is reported to the operator, but
does not require operator attention (such as diagnostics and system
alerts).
3-7 Alarm conditions of priority 3 to 7 are advisory alarms of increasing
priority.
8-15 Alarm conditions of priority 8 to 15 are critical alarms of increasing
priority.
4.11.8 Status handling
Normally, the status of the PV reflects the status of the measurement value, the operating
condition of the I/O card, and any active alarm condition. In Auto mode, OUT reflects the
value and status quality of the PV. In Man mode, the OUT status constant limit is set to
indicate that the value is a constant and the OUT status is Good.
The Uncertain - EU range violation status is always set, and the PV status is set high- or low-
limited if the sensor limits for conversion are exceeded.
In the STATUS_OPTS parameter, you can select from the following options to control the
status handling:
BAD if Limited Sets the OUT status quality to Bad when the value is higher or
lower than the sensor limits.
Uncertain if Limited Sets the OUT status quality to Uncertain when the value is
higher or lower than the sensor limits.
Uncertain if in
Manual mode The status of the Output is set to Uncertain when the mode is
set to Manual.
Note
The instrument must be in Manual or Out of Service mode to set the status option. The AI
block only supports the BAD if Limited option. Unsupported options are not grayed out;
they appear on the screen in the same manner as supported options.
4.11.9 Advanced features
The AI function block provided with Rosemount
™
fieldbus devices provides added
capability through the addition of the following parameters:
Configuration Reference Manual
September 2019 00809-0100-5901
166 Reference Manual