Siemens FST020, Function Manual, Page: 73 / 194

Setup
3.4 Inputs and outputs
FST020 Function manual
Function Manual, 09/2017, A5E42949526-AA
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3.4.2.3 Fail-safe activation condition
Description
Defines the condition the fail-safe behaviour of the channel becomes active and determines
the channel availability.
Setting Invalid process value; Maintenance alarm or Failure (NAMUR)
Default Maintenance alarm or Failure (NAMUR)
Related
Path Setup → Inputs and outputs → Channel 2 - output → Fail-safe activation condition
3.4.2.4 Current output
3.4.3.4.1 Process value
Description
Select process value for the current output.
Setting Volume flow; Mass flow; Flow velocity; Sound velocity; Density; Kinematic viscosity; Medi-
um temperature
Default Mass flow
Related
Path Setup → Inputs and outputs → Channel 2 - output → Current output → Process value
3.4.3.4.2 Direction
Description
Flow direction filter applicable for process values mass flow/volume flow/flow
velocity/standard volume flow rate (only hydrocarbon and gas applications).
Setting Positive; Negative; Bidirectional; Bidirectional (symmetric)
Default Positive
Related
Path Setup → Inputs and outputs → Channel 2 - output → Current output → Direction