Device Behavior In The Event Of Alarms And Warnings; Alarm And Warning Messages; Device Configuration For Safety-Related Applications; Calibration Of The Measuring Point - Safety Function 1 (Level Measurement) - Endress+Hauser Proserve NMS80 Functional Safety Manual

Use in safety instrumented systems
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5.1.7

Device behavior in the event of alarms and warnings

The output current in the event of an alarm can be set to a value of ≤3.6 mA or ≥21.0 mA.
In some cases, e.g. failure of power supply, a cable break and faults in the current output
itself where the failure current ≥21.0 mA cannot be set, output currents ≤3.6 mA occur
irrespective of the configured failure current.
In some other cases (e.g. cabling short circuit), output currents of ≥21.0 mA occur
irrespective of the configured failure current.
For alarm monitoring, the downstream logic unit must be able to recognize failure currents
of the upper signal on alarm level (≥21.0 mA) and of the lower signal on alarm level
(≤3.6 mA).
5.1.8

Alarm and warning messages

Additional information is provided by the alarm and warning messages in the form of
error codes and associated clear text messages.
The following table shows the correlation between the error code and the current output:
1)
Error code Current output (message type)
Fxxx ≥21.0 mA or ≤3.6 mA
Mxxx corresponding to measuring mode
Cxxx corresponding to measuring mode
Sxxx corresponding to measuring mode
1) The error codes are listed in the Operating Instructions.
Exceptions:
1)
Error code Current output (message type)
C484 ≥21.0 mA or ≤3.6 mA
1) The error codes are listed in the Operating Instructions.
5.2

Device configuration for safety-related applications

It is recommended to carry out a factory reset before configuring the parameters.
Navigate to: Setup → Advanced setup → Administration
Device reset = To factory defaults
This resets all parameters to defined values.
5.2.1 Calibration of the measuring point - safety function 1 (level
measurement)
Calibration of the measuring point is described in the Operating Instructions (→  8).
Specify which type of configuration a) or b) should be used. Both configurations can apply
in parallel or in combination with safety function 2 (current input measurement).
a) Level value (source) (1) -> safety-related signal: analog output (2)
b) Level value (source) (1) -> safety-related signal: digital output (3)
Level value (source) (1)
Make sure that the application is configured correctly.
Proserve NMS80
Note
xxx = three-digit number
xxx = three-digit number
xxx = three-digit number
xxx = three-digit number
Note
Failure mode simulation
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