User's Manual

7ML19985JM01 SITRANS LR 460 – INSTRUCTION MANUAL Page 74
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Parameters
3.1.8.5. Limit Hysteresis
Hysteresis is used to adjust the sensitivity of the trigger for alarm
messages. It is used to compensate when a process variable fluctuates
around the same value as a limit. A high level alarm occurs when a value
exceeds an upper limit. The alarm’s status remains true until the value
drops below the limit minus the alarm hysteresis. The directions are
reversed for low limit detection.
Enter a value for the hysteresis here, to be used for all warnings and
alarms. The units are the same as the output value scale.
3.1.8.6. Min Out
Min Out is a minimum peak indicator for the AIFB output values.
3.1.8.7. Max Out
Max Out is a maximum peak indicator for the AIFB output values.
3.1.9. Failsafe Mode
3.1.9.1. Failsafe Mode
Failsafe Mode occurs if the status of the input value is bad, or if the device
has been put into Failsafe mode using Simulation. One of three options can
be selected for the material level to be reported when the LOE timer
expires.
3.1.9.2. Failsafe Value
(Accessible in PDM only after 0 is selected in Failsafe Mode).
User-defined default value for the OUT parameter, if sensor or sensor
electronic fault is detected. Units are the same as the OUT value.
3.1.A. Human Interface
3.1.A.1. Decimal Point
The number of digits to display after the decimal point. (The LCD is limited
to displaying three decimal places.)
Out unit text
If the code list does not contain a desired unit for the OUT parameter, (see
General Requirement) you can write the specific text in this parameter.
3.2. AIFB2
(See AIFB1: the parameters for AIFB2 are identical.)
Handheld
programmer
Values
Material level to be reported
0 Default value used as output value.
1 * Store last valid output value.
2 Calculated output value is incorrect.