Alarm Class; Namur Status Signal; Polarity - Siemens FST020 Function Manual

3.4.3.13

Alarm class

Description
Selection of alarm classes which impact the status output. Each diagnostic event is allocated
to an alarm class. Applicable if Status mode = Alarm class and Status icons = Standard.
Bit 0: Process value alarm (PA)
Bit 1: Process value warning (PW)
Bit 2: Maintenance alarm (MA)
Bit 3: Maintenance warning (MW)
Bit 4: Maintenance required (MR)
Bit 5: Function check (FC)
Setting
Default
Related
Path
3.4.3.14

NAMUR status signal

Description
Selection of NAMUR status signals which impact the status output. Each diagnostic event is
allocated to a NAMUR status signal. Application if Status mode = Alarm class and Status
icons = NAMUR
Setting
Default
Related
Path
3.4.3.15

Polarity

Description
Logical polarity of status output.
Setting
Default
Related
Path
FST020 Function manual
Function Manual, 09/2017, A5E42949526-AA
Maintenance alarm; Function check; Process value alarm; Process value warning; Mainte-
nance demanded; Maintenance required; None
Setup → Inputs and outputs → Channel 3 - relay → Alarm class
Failure; Function Check; Out of specification; Maintenance Required
None
Setup → Inputs and outputs → Channel 3 - relay → NAMUR status signal
Active high level; Active low level
Active high level
Setup → Inputs and outputs → Channel 3 - relay → Polarity
Setup
3.4 Inputs and outputs
79