Endress+Hauser RMC621 Mode D'emploi page 5

With regard to 5.3 alarm response - displaying error messages
The user can configure how the device responds in the event of an error. The measuring range can
be freely defined for all analog inputs and the alarm response can be defined for when the system
exceeds the range limits. In addition, the alarm response can also be configured if special process
errors occur (e.g. wet steam condition).
The alarm response affects the display, counters and outputs.
The alarm response of the device is defined in the operating item Set-upÉBasic set-upÉAlarm
response.
Factory setting:
Process errors are always displayed as notice messages, i.e. the errors do not have any effect on the
counters and outputs. The NAMUR guidelines apply for the range limits of the analog inputs (cur-
rent). (3.6/3.8/20.5/21mA)
Free configuration:
The alarm response of the inputs and outputs, as well as of the application-related process errors,
can be configured individually. In this way, the behavior of current value calculation, counters and
outputs can be defined explicitly.
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Caution!
If the user resets the system from "Free configuration" to "Factory setting", all the operating items
for setting the alarm response are reset to the default value (overwritten!).
Alarm response
A distinction is made between two types of alarm, namely "Notice" and "Fault"
Current values
Counters
Outputs
Display
Configuration parameters for the alarm response of the inputs
a) Analog inputs
The signal range limits can be freely configured for all the analog inputs. Values for upper and lower
range limits and cable open circuit limits have to be defined for this. See the example below.
Notice
The current process values are calculated on the basis of the response configured (last value,
fixed value, extrapolation). See under "Inputs".
Normal counters continue to operate
Outputs are not affected
Color change and alarm message display can
be configured
Fault
Counters halted. Deficits are recorded on a
separate disturbance quantity counter (this
can be shown on the display and be output
via the pulse output)
Outputs react in accordance with the failsafe
mode configured
Color change to red, alarm message display
can be configured
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