Limit Hysteresis (2.5.6.5.); Filter Time Constant (2.5.7.1.); Aifb 2 (2.6.); Measured Values (2.7.) - Siemens SITRANS LR560 Operating Instructions Manual

Parameter Reference
8.2 SETUP (2.)
8.2.5.10

LIMIT HYSTERESIS (2.5.6.5.)

Factory setting:
Setting range:
Purpose:
Description:
8.2.5.11

FILTER TIME CONSTANT (2.5.7.1.)

The time constant for the damping filter. The damping filter smooths out the response to a
sudden change in level. This is a first order filter and the engineering unit is always in
seconds, see
Values
To meet accuracy specification, Filter Time Constant (PV_FTIME) must be changed from
a)
default of 0.0 s to a minimum of 10.0 seconds, see Performance (Page 171).
8.2.6

AIFB 2 (2.6.)

See AIFB1 (2.5.) (Page 136). The parameters for AIFB 2 are identical to AIFB 1.
8.2.7

MEASURED VALUES (2.7.)

Read only. Allows you to view measured values for diagnostic purposes.
8.2.8

MAIN OUTPUT (2.7.1.)

The value for Level.
In AMS Device Manager, see Process Variables (Level Transducer Block - LTB) (Page 101).
8.2.9

OUTPUT NO LINEARIZATION (2.7.2.)

The value for Level.
140
0.20 for 40 m version
0.50 for 100 m version
Range: 0 to 999999.00
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 scale, i.e. AIFB1 units.
for more detail.
Damping (Page 195)
Range: Any non-negative number can be entered Unit: s
Default: 0
a)
LR560 (FOUNDATION FIELDBUS)
Operating Instructions, 06/2018, A5E34648692-AE