Alarm Set Points/Fault Monitoring - Endress+Hauser RMA 422 Mise En Service

5.5 Alarm set points/fault monitoring

The following addresses are only available if the unit is fitted
with the Alarm relay option, each of the alarm set points is
allocated an alarm relay output with a changeover contact
(SPDT). The relay is switched to a de-active state on alarm or
fault condition. A yellow LED on the unit front panel indicates
the relay condition in accordance with the NAMUR NE44
recommendation:
LED on when the relay is active; LED off when the relay is
de-active. The LC display option will indicate the type of alarm
set point infringement, exceeding the set point or undercutting
it will be displayed.
The following description is valid for
LIM1
the set points and
Parameter
* Reference value
Selecting the signal source
that is to be monitored
* Operating mode
Selection of operation mode
of the alarm set points and
fault monitor
* Set point
Enter the set point.
LIM2
Setting up selections
LREF1 LREF2
/
Selection range:
IN1
: Process value ch. 1
IN2
: Process value ch. 2
MATH
: Process value maths.
MODE1 / MODE2
OFF
Set point and fault monitor
inactive
MIN
Minimum safety:
Event message on undercutting
the set point and in fault
condition.
MAX
Maximum safety:
Event message on exceedeing
the set point and in fault
condition.
TRD
Trend monitoring:
Event message on exceeding the
preset signal change per time
unit set point and in fault
condition.
ALARM
Event message only in fault
condition, no set point monitor.
MIN-
Minimum safety:
Event message on undercutting
the set point.
MAX-
Maximum safety:
Event message on exceedeing
the set point.
TRD-
Trend monitoring:
Event message on exceeding the
preset signal change per time
unit set point.
SETP1 / SETP2
Value:
-19999 to 99999
Process transmitter
LIM1 / LIM2
Default Actual
settings setting
IN1
OFF
0,0
55