DVC6000f Series
March 2006
9-6
Table 9-1. Setting PlantWeb Alerts (Continued)
PlantWeb Alert
and (Group)
Alert Category
and (Default)
Alert Condition
and (Default)
What the Alert is
Detecting
Related Parameters and
(Default)
Guidelines for Setting
Supply Pressure
(Environment)
User Config.
(Maintenance)
Supply Press High
(Enabled)
The supply pressure reading
is above the user adjusted
threshold.
Alert Point (145 psig)
Enable the alert in the
Maintenance Alert Category.
Set the Alert Point to which
ever is lower of
a. the maximum
instrument pressure of 145
psig or
b. the maximum actuator
casing pressure.
Supply Press Low
(Enabled)
The supply pressure reading
is below the user adjusted
threshold
Alert Point (19 psig)
Enable the alert in the
Maintenance Alert Category.
Double Acting Actuators—
Set the Alert Point above the
minimum required for valve
shutoff and no greater than
1 psig below
the supply
regulator setting
Single Acting Actuators—
Set the Alert Point above the
minimum required for valve
shutoff and no greater than
1 psig below
the supply
regulator setting. This is
generally about 3 psig above
the actuator upper bench set
(stroking) pressure.
Temperature Limit
(Environment)
User Config.
(Advisory)
Temperature High
(Enabled)
The instrument temperature is
above the used adjusted
threshold.
Alert Point ( 186C)
Use default settings
Other alert points may be
chosen to indicate changes
in the instrument
environment.
Temperature Low
(Enabled)
The instrument temperature is
below the user adjusted
threshold.
Alert Point ( −63C)
Enable the alert in the
Maintenance Alert Category.
Set the Alert Point at −40F
if the instrument uses Nitrile
elastomers and −63F if it
uses Fluorosilicone
elastomers.
Other alert points may be
chosen to indicate changes
in the instrument
environment.
Travel Deviation
(Travel)
User Config.
(Maintenance)
Travel Deviation
(Enabled)
The difference between
Setpoint and Travel is greater
than the configured limits.
Alert Point (5%)
Alert Time (10 sec)
Deadband (2%)
Enable the alert in the
Maintenance Alert Category.
Use the default settings with
valves that are 4 inch and
smaller with PTFE packing
systems.
With other valves, the user
can refine the settings with
AMS ValveLink Software
Dynamic Error Band and
Step Response Tests. Set
the related parameters as
follows:
Tvl Dev Alert Point—set
equal times 2 the Maximum
Dynamic Error, minimum 3%
Tvl Dev DB—set equal to
the Dynamic Error Band,
minimum 2%
Tvl Dev Time—set equal to
the T98 time for a Step Test
from 0 to 100% Travel,
minimum 10 seconds.
−Continued−
9
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