Endress+Hauser promag 31, Руководство по эксплуатации

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5. Fault Location and Remedies
5.1 Behaviour of the measuring equipment in the event
of a fault or alarm
Notes!
•
Errors which occur while operation is in progress are emitted at the status output,
provided its configuration is appropriate (see Chapter 4).
•
An LED is also situated on the amplifier board of the Promag 31 (see Fig. 44).
This LED is always lit as long as the measuring system is operating correctly. In
case of error the LED is flushing, thus indicating an error. If the LED ist neither lit
nor flashing there is a power supply breakdown. The LED is not accessable for the
fiscal measurement version (seal!).
The Promag 31 measuring system reacts to faults or an alarm in the following manner:
Type of fault Behaviour of the outputs
➤
Status output open, i.e. open collector not
conducting (see page 36).
System error (fault, failure)
Process error (alarm)
Supply failure
➤
Pulse output: No output of pulses until the
fault has been cleared.
➤
Current output: The current is set to a definite
value until the fault has been cleared.
0...20 mA
⇒
0 mA
4...20 mA
⇒
2 mA
Note!
With measured value suppression the following points are important:
•
System errors are given as usual over the status output.
•
Process errors have a lower priority and are not given at the status output with
active measured value suppression.
•
With the fiscal measurement system Promag 31 the active measured value
suppression is not available.
Error messages on the display
➤
System error
⇒
ERROR segment visible
➤
Process error
⇒
EDP segment visible
(Empty Pipe)
Not available with fiscal measurement system
Promag 31!
➤
Overflow
⇒
Overflow segment visible
Fig. 41
b
a
028y
38
Promag 31 5. Fault Location and Remedies
Hauser 39