Fail-Safe Activation Condition; Current Output - Siemens FST020 Function Manual

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
Default
Related
Path
3.4.2.4

Current output

3.4.3.4.1 Process value
Description
Select process value for the current output.
Setting
Default
Related
Path
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
Default
Related
Path
FST020 Function manual
Function Manual, 09/2017, A5E42949526-AA
Invalid process value; Maintenance alarm or Failure (NAMUR)
Maintenance alarm or Failure (NAMUR)
Setup → Inputs and outputs → Channel 2 - output → Fail-safe activation condition
Volume flow; Mass flow; Flow velocity; Sound velocity; Density; Kinematic viscosity; Medi-
um temperature
Mass flow
Setup → Inputs and outputs → Channel 2 - output → Current output → Process value
Positive; Negative; Bidirectional; Bidirectional (symmetric)
Positive
Setup → Inputs and outputs → Channel 2 - output → Current output → Direction
Setup
3.4 Inputs and outputs
71