West Control Solutions N4400 - Manual (Page 29)

Parameter Message
Display
Function Available Settings/Values
(Lower Main Display)
Deviation
(High/Low) Alarm
1 value If Alarm 1 is a Deviation
(High/Low) Alarm, this defines a
level above (positive value) or
below (negative value) the
setpoint. If the process variable
deviates from the setpoint by a
margin greater than this value,
the alarm becomes active (see
Figure 9-2) ±
(input range) from setpoint.
Default = 5 input units.
Alarm 1
Hysteresis value Defines a hysteresis band on
the "safe" side of the Alarm 1
value (see Figure 9-3). 1 LSD to 10% of input span (0
is an invalid value).
Process High
Alarm 2 value If Alarm 2 is a Process High
Alarm, this defines the level of
the process variable at or above
which Alarm 2 will be active
(see Figure 9-2) Input Range Maximum to Input
Range Minimum.
Default = Input Range Max.
Process Low
Alarm 2 value If Alarm 2 is a Process Low
Alarm, this defines the level of
the process variable at or below
which Alarm 2 will be active
(see Figure 9-2) Input Range Minimum to Input
Range Maximum.
Default = Input Range Min.
Band Alarm 2
value If Alarm 2 is a Band Alarm, this
defines the band of process
variable value (centred on the
setpoint) outside which the
process variable will cause the
alarm to become active (see
Figure 9-2). ±
(input span) from setpoint.
Default = 5 input units.
Deviation
(High/Low) Alarm
2 value If Alarm 2 is a Deviation
(High/Low) Alarm, this defines a
level above (positive value) or
below (negative value) the
setpoint. If the process variable
deviates from the setpoint by a
margin greater than this value,
the alarm becomes active (see
Figure 9-2)
±
(input range) from setpoint.
Default = 5 input units.
Alarm 2
Hysteresis value Defines a hysteresis band on
the "safe" side of the Alarm 2
value (see Figure 9-3). 1 LSD to 10% of input span (0
is an invalid value).
Loop Alarm
Enable Enables/disables Loop Alarm
(see Subsection 9.3). 0 (disabled) or 1 (enabled).
Default = 0 (disabled).
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