Setup
3.4 Inputs and outputs
FST030
106 Function Manual, 04/2017, A5E35693328-AA
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.
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).
Redundancy mode (frequency)
If both channel 2 and channel 3 are configured as frequency outputs, channel 3 can be
configured for redundancy mode to follow channel 2 shifted by 90˚or 180˚. If set to
redundancy mode, channel 3 inherits all channel 2 settings. The flow direction will determine
whether channel 3 is shifted before or after channel 2 at 90° shift.
The following examples describe the frequency functionalities for channel 2 and 3 in
redundancy mode:
Channel 2 configured as positive and negative direction and channel 3 set to redundancy
mode 90°
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