Digital Input - Siemens SITRANS F Series Operating Instructions Manual
Ultrasonic flowmeters
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Also See for SITRANS F Series:
- Operating instructions manual (362 pages) ,
- Quick start manual (220 pages) ,
- Manual (188 pages)
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Measured mass flow value = 7.5 kg/s (constant)
Result:
● Frequency = 4.5 kHz
Note
The connected equipment must be capable of registering the full range of frequencies
configured.
Status output
The status output can be used to show alarm status and it can be signaled on Status output or
Relay output.
Note
Flow direction warning
The limit function for the current output can be used to signal the flow direction by setting the
Lower warning limit for the Process value to 0. A warning will occur in case of negative flow.
This warning can be output on the status ouput if Status mode is set to Alarm item and the
Process alarms (1) [relevant process value] below warning limit is selected.
Depending on the Status mode setting, multiple alarms can be signaled on the output and
selected from the alarm class or the alarm item lists.
• Alarm class: Alarm will be signaled if alarm within the selected alarm class occurs.
• Alarm item: Alarm will be signaled if selected alarm item occurs. It is possible to select
multiple alarms to be signaled.
Note
Alarm class / NAMUR status signals
The options depend on the setting selected in Staus icons, either NAMUR status signals or
Alarm class (Siemens Standard).
9.2.1
Digital input
Digital input
If the input signal is activated with a logical signal (15 to 30 V DC) and the Polarity is set to Active
high level, the meter carries out an activity selected in the menu Input function:
• Reset totalizer 1 on channel 7
• Pause/resume totalizer 1 on channel 8
SITRANS FST090
Operating Instructions, 11/2021, A5E50387341-AA
Parameter assignment
9.2 Inputs and outputs
65
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