User's Guide _______________________________________________________________________
68 _______________________________________________________________________________
Display Alarms
The Display Alarm feature provides two independently configurable
alarms for transmitters with the display/keypad option. Each alarm
tracks a selected quantity, with a freely configurable low and high
limit. Each alarm also has a configurable hysteresis value to prevent
unnecessary triggering when the measurement fluctuates around an
alarm limit. The alarms can be configured for any quantity supported
by the transmitter. The configuration of the Display Alarms can only
be done using the display/keypad option.
An alarm is activated when the selected quantity goes higher than the
high limit, or lower than the low limit, much in the same way as the
relays. When an alarm is activated, an alarm note is displayed on the
display, and the lights of the display will blink.
0802-041
Figure 43
Display Alarm Active
Multiple alarms can be active at the same time; the alarm that was
triggered first will be shown on the display. The next active alarm is
revealed when the currently shown alarm is acknowledged by pressing
the
OK
button.
Note that activated alarms are only shown on the screen. There are no
alarm messages output to the serial line, or markers placed in the
graph data. After an alarm has been acknowledged, you must refer to
the data graphs to see when the measured quantities have exceeded the
limits.
Configuring a Display Alarm
1.
Enter the
Main Menu
by pressing an arrow key on the keypad.
2.
Use the arrow keys to select
Display
, followed by
Alarms,
to
open the
Display Alarms
menu. The Display Alarms menu
shows the currently enabled and disabled alarms.
