Spirax Sarco B850-W-2 Guia De Inicio Rapido página 48

15.3 Failure notification of measurement inputs
Failures associated with particular channels are marked with appropriate symbols on the
display.
Symbols of failure:
-
-F- RTD sensor failure.
-
-||- 4-20 mA transducer failure, current below 3.6 mA.
-
-E- 4-20 mA transducer failure, current above 22 mA.
-
-S- steam parameters below saturation curve (only when detection of steam saturation
is on).
-
-R- exceeding the range.
-
-W- wait (after power on, when data is not ready.
-
-C- internal communication error.
Symbols of failure are displayed instead of the result for all related channels, e.g. for
measurement input and the calculation channel in which the result is used.
No signal from the sensor assigned to the particular input is treated as a failure and marked
on the display with the '-F' (failure) symbol. Detection of a failure may trigger displaying the
appropriate message and then require confirmation by the user even if the cause of the failure
ended earlier. Depending on the settings during programming the device, a failure may cause
the excitation of corresponding output relay till the confirmation or for the entire duration of
failure. Failure and its disappearance may be recorded in the Event log.
If a GSM module is connected to the RS-485 port, failure information can be sent via text
message to specified phone numbers.
48 IM-P408-04 AB Issue 2