7ML19985JB02 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL Page 99
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H: Parameters
3.1.8.5. Limit Hysteresis (default 0.50%)
Defines the value of the hysteresis used for all warnings and alarms.
Hysteresis is used to adjust the sensitivity of the trigger for alarm
messages, 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. Minimum Output Value
The minimum peak indicator for the AIFB output values.
3.1.8.7. Maximum Output Value
The maximum peak indicator for the AIFB output values.
3.1.9. Failsafe Mode
3.1.9.1. Failsafe Mode
Defines the reaction of the device if a Failsafe condition is detected, or if
the device has been put into Failsafe mode using Simulation. You can
select one of three options for the material level to be reported when the
LOE timer expires.
3.1.9.2. Failsafe Value (default 0)
(Accessible in PDM only after 0 is selected in Failsafe Mode).
A user-defined value to be output by the Function Block if Failsafe mode is
set to: Default value is used as output value.
3.1.A. Human Interface
3.1.A.1. Decimal Point (default 2)
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.)
Hand
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.
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