Parameter
Message
Display
Function
Available Settings/Values
(Lower Main Display)
Deviation
(High/Low)
Alarm 2 Value
If Alarm 2 is a Deviation
High/Low alarm, gives a
value 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 range 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, 1 = Enabled.
Default = 0 (Disabled)
Loop Alarm
Time
If ON/OFF control is
selected (i.e. PB1 = 0)
and Loop Alarm is
enabled, this defines the
duration of the saturation
condition after which the
Loop Alarm is activated
(see Subsection 9.3).
1 second to 99 minutes 59
seconds.
Default = 99 minutes 59 seconds.
Scale Range
Decimal
Point
9
For linear inputs, defines
the decimal point
position.
0 = XXXX
1 = XXX.X (Default)
2 = XX.XX
3 = X.XXX
Scale Range
Maximum
9
For linear inputs, defines
the scaled input value
when the process
variable input is at its
maximum value.
−1999 to 9999 (decimal point
position as defined by Scale
Range Decimal Point parameter
(see above).
Default = 100.0
Scale Range
Minimum
9
For linear inputs, defines
the scaled input value
when the process
variable input is at its
minimum value.
−1999 to 9999 (decimal point
position as defined by Scale
Range Decimal Point parameter
(see above).
Default = 0.0
Auto Pre-Tune
Enable/Disable
Determines whether the
Pre-Tune facility is
automatically activated
on power-up.
OFF = Disabled, ON = Enabled.
Default = OFF.
Manual
Control
Enable/Disable
Enables/disables
operator selection of
Manual Control mode.
OFF = Disabled, ON = Enabled.
Default = OFF.
Comm-
unications
Write
Enable/Disable
10
Enables/disables
adjustment of parameter
settings/value via the
RS485 communications
link.
OFF = Disabled, ON = Enabled.
Default = OFF.
9-5