Limit values for measured variables (menus 3.1.3, 3.2.3 and 3.3.2)
Limit values and hysteresis are related to the output scale; the hysteresis is an absolute value and
is independent of scaling changes.
①
Measured variable
②
Limit alarm
③
Time
④
Hysteresis - limit max.
⑤
Hysteresis - limit - min.
Figure 7-2
Effect of hysteresis
Values exceeding or undershooting limits will be indicated in the measured value status
("Limits", chapter above). "active advisory alarm" warning limits and "alarm critical alarm" alarm
limits are signaled in the substatus when they occur. The limit bits and alarm status are only
removed when the measured value undershoots the affected limit in the opposite direction
again by the value of the set hysteresis.
Totalizer (menus 3.4, 3.5 and 3.6)
The totalizers have fixed counting direction settings. The counting direction cannot be changed.
The totalizers directly accumulate the physical measured values according to the negative or
positive sign, that is the reverse totalizer only accepts negative values.
The reading of the net totalizer is accumulated from the flow values with the correct sign and is
not calculated from the difference of the values of the forward and reverse totalizer. If individual
totalizers are not reset or started at the same time, the reading on the net totalizer may deviate
from the difference between the forward and reverse totalizer values.
Set Totalizer (menus 3.4.3, 3.5.3, 3.6.3 and 1.3.4)
"Stop+Reset":The selected totalizer is stopped and set to "0".
The totalizer remains stopped and may have to be restarted.
"Start": The selected totalizer is started.
Functions
7.3 Measuring functions (menu 3)
SITRANS FUS060 with PROFIBUS PA
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Operating Instructions, 09/2021, A5E02225054-AD