6-42 BE1-951 Reporting and Alarm Functions 9328900990 Rev L
D2850-09.vsd
06-29-99
RA-MAJ=0
Logic
Alarm
Reset
Logic
RA-MIN=0
ARSTKEY
HMI RESET KEY
Figure 6-22. Programmable Alarm Function
The Reset key of the HMI is context sensitive. That is, the functionality depends upon what screen is
currently being displayed. BESTlogic variable ARSTKEY takes advantage of this to allow the front panel
Reset key to be used in the programmable logic scheme when Alarms screen 1.3 is active. An example
of the use of this logic variable is to break the seal-in for a logic expression. The logic expression can be
programmed so that the seal-in function uses VO13, VO14, or VO15. If the virtual output expression is
included in one of the programmable alarm masks, the automatic display priority logic will cause the
display to go to Alarm Screen 1.3. When the HMI Reset key is pressed, the ARSTKEY logic variable is
asserted and the logic expression seal-in is broken. See Section 8, Application, Application Tips, for more
information. Pressing the HMI Reset key while the Alarms screen is displayed, will clear any latched
alarms that are not currently active. Refer to
Table 6-20 for a list of latching alarm points and self-clearing
alarm points.
After an operation, alarms information can be viewed using BESTCOMS. Select Metering from the
R
eports pull-down menu. Alarms are shown on the Metering screen. Refer to Figure 6-23.
P0032-20
07-25-05
Figure 6-23. Metering Screen
The RA (report alarms) command can be used to read detailed alarm reports and reset latched alarms.
RA Command
Purpose: Report/Reset alarm information.
Syntax: RA-<type>={0}
Comments: type = LGC (Logic), MAJ (Major), MIN (Minor) or REL (Relay). <=0> means clear the
latched alarm. Privilege G or R password access is required to reset alarms.
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