Process value parameters
The process values are:
● Mass flow
● Volume flow
● Standard volume flow
● Density
● Process media temperature
● Fraction
For SIL ordered flowmeters, mass flow, volume flow and density are available to be allocated
to the current output on Channel 1.
For non SIL ordered flowmeters, all process values are available to be located to the current
output, Modbus RS-485 and Profibus on Channel 1.
For Channel 2 to 4 all process values are available.
Limits and hysteresis
Limits
Limit alarms and warnings can be assigned to all process values. The following limit
parameters are available for each process value:
● Upper Limit Alarm
● Upper Limit Warning
● Lower Limit Warning
● Lower Limit Alarm
● Alarm Hysteresis
The system reports a process alarm when the process value exceeds the Upper Limit Alarm or
the Lower Limit Alarm. Likewise, the system reports a process warning when the process value
exceeds the Upper Limit Warning or the Lower Limit Warning. Process value alarms and
warnings are displayed in the HMI as well as at the communication interfaces.
Hysteresis
The hysteresis functions as follows:
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Figure 8-1
Hysteresis
Parameter assignment
8.2 Functions
SITRANS FC330
128
Operating Instructions, 01/2019, A5E44030648-AB