These fields are used to specify the limits for module alarms. Each of
the alarms is assigned to one of the function blocks in the module: AI1 (PV),
MEAN, STDEV, and CV. Note that the alarm limits set within the module may be
different than alert limits internal to a transmitter with SPM.
- Hi Hi Lim - This
field displays the maximum value of the PV in engineering units before the high
high limit active bit (HI_HI_ACT for the AI1 function block) is set. Click this
field to enter a new limit.
-
Hi Lim - This field displays the maximum value of the PV in
engineering units before the high limit active bit (HI_ACT for the AI1 function
block) is set. Click this field to enter a new limit.
-
Lo Lim - This field displays the minimum value of the PV in
engineering units before the low limit active bit (LO_ACT for the AI1 function
block) is set. Click this field to enter a new limit.
-
Lo Lo Lim - This field displays the minimum value of the PV in
engineering units before the low low limit active bit (LO_LO_ACT for the AI1
function block) is set. Click this field to enter a new limit.
-
Alm Hysteresis - This field displays the alarm hysteresis (or
deadband) value for the PV (AI1) alarms in % of PV Scale. Click this field to
enter a new value. An alarm does not recur until the PV has backed away from
the corresponding limit by at least the % of PV Scale specified by this value.
-
Low Cutoff - Activated when the Low Cutoff I/O option for the
AI1 function block is enabled. When the converted measurement is below the
LOW_CUT value, it is shown in the PV as 0.0.
-
Mean Hi Lim - This field displays the maximum value of the
Mean in engineering units before the high limit active bit (HI_ACT for the MEAN
function block) is set. Click this field to enter a new limit.
-
Mean Lo Lim - This field displays the minimum value of the
Mean in engineering units before the low limit active bit (LO_ACT for the MEAN
function block) is set. Click this field to enter a new limit.
-
Mean Alm Hysts - This field displays the alarm hysteresis (or
deadband) value for MEAN alarms in % of Mean Scale. Click this field to enter a
new value. An alarm does not recur until the Mean has backed away from the
corresponding limit by at least the % of Mean Scale specified by this value.
-
Std Dev Hi Lim - This field displays the maximum value of the
Standard Deviation in engineering units before the high limit active bit
(HI_ACT for the STDEV function block) is set. Click this field to enter a new
limit.
-
Std Dev Lo Lim - This field displays the minimum value of the
Standard Deviation in engineering units before the low limit active bit (LO_ACT
for the STDEV function block) is set. Click this field to enter a new limit.
-
Std Dev Alm Hysts - This field displays the alarm hysteresis
(or deadband) value for the STDEV alarms in % of Standard Deviation Scale.
Click this field to enter a new value. An alarm does not recur until the
Standard Deviation has backed away from the corresponding limit by at least the
% of Standard Deviation Scale specified by this value.
-
CV Hi Lim - This field displays the maximum value of the
Coefficient of Variation (CV) in engineering units before the high limit active
bit (HI_ACT for the CV function block) is set. Click this field to enter a new
limit.
-
CV Lo Lim - This field displays the minimum value of the CV in
engineering units before the low limit active bit (LO_ACT for the CV function
block) is set. Click this field to enter a new limit.
-
CV Alm Hysts - This field displays the alarm hysteresis (or
deadband) value for the CV alarms in % of CV Scale. Click this field to enter a
new value. An alarm does not recur until the CV has backed away from the
corresponding limit by at least the % of CV Scale specified by this value.