Flexim FLUXUS F401, Руководство по эксплуатации

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16 Advanced functions
16.11 Behavior of the alarm outputs
FLUXUS F401
2020-06-12, UMFLUXUS_F401V2-1EN
116
16.10.3 Defining the hysteresis
A hysteresis can be defined for the alarm output R1. This prevents a constant triggering
of the alarm when measured values fluctuate marginally around the limit.
The hysteresis is a symmetrical range around the limit. The alarm will be activated if the
measured values exceed the upper limit and deactivated if the measured values fall be -
low the lower limit.
If the switching condition
MAX
or
MIN
is selected in the scroll list
func
:
• Enter a value for the hysteresis or enter zero to work without hysteresis.
• Press ENTER.
16.11 Behavior of the alarm outputs
16.11.1 Apparent switching delay
The measured values and totalizer values will be displayed rounded to 2 decimal places.
The limits, however, will be compared to the non-rounded measured values. This might
cause an apparent switching delay when the measured value changes marginally (less
than 2 decimal places). In this case the switching accuracy of the output is higher than
the accuracy of the display.
16.11.2 Reset and initialization of the alarms
After an initialization of the transmitter, all alarm outputs will be configured as follows:
Example
High Limit : 30 kg/h
Hysterese : 1 kg/h
The alarm is activated for measured values > 30.5 kg/h and deactivated for measured
values < 29.5 kg/h.
R1 Input\...\Hysterese
Tab. 16.2: Alarm state after an initialization
func OFF
typ NON-HOLD
mode NO Cont.
Limit 0.00