78
Reference Manual
00809-0100-2240, Rev DA
October 2017
5.10.7
Process alarm
Process Alarm detection is based on the OUT value. You can configure the alarm limits of the following
standard alarms:
High (HI_LIM)
High high (HI_HI_LIM)
Low (LO_LIM)
Low low (LO_LO_LIM)
In order to avoid alarm chattering when the variable is oscillating around the alarm limit, an alarm
hysteresis in percent of the PV span can be set using the ALARM_HYS parameter. The priority of each
alarm is set in the following parameters:
HI_PRI
HI_HI_PRI
LO_PRI
LO_LO_PRI
5.10.8
Alarm priority
Alarms are grouped into five levels of priority:
Table 5-11. Alarm Level Priority
Priority
Number
Priority Description
0
The priority of an alarm condition changes to 0 after the condition that caused
the alarm is corrected.
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.
Summary of Contents for Rosemount 2240S
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Page 16: ...6 Reference Manual 00809 0100 2240 Rev DA Introduction October 2017 Introduction ...
Page 28: ...18 Reference Manual 00809 0100 2240 Rev DA Overview October 2017 Overview ...
Page 192: ...182 Reference Manual 00809 0100 2240 Rev DA Index October 2017 Index ...
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