Troubleshooting
Proline Prosonic Flow 91
60
Hauser
8.4
Response of outputs to errors
!
Note!
The response of the totalizer, current output, pulse output and status output is defined in the
FAILSAFE MODE function (
The outputs can be set to their fallback value be means of the postitive zero return. Applicable when
operation has to be interrupted while a pipe is being cleaned. This function takes priority over all
other device functions; simulations, for example, are suppressed.
Failsafe mode of outputs and totalizers
Process/system error is present
Positive zero return is activated
Current output
MINIMUM VALUE
4–20 mA (25 mA)
2 mA
4–20 mA NAMUR
3.5 mA
4–20 mA US
3.75 mA
4–20 mA (25 mA) HART
2 mA
4–20 mA HART NAMUR
3.5 mA
4–20 mA HART US
3.75 mA
MAXIMUM VALUE
4–20 mA (25 mA)
25mA
4–20 mA NAMUR
22.6 mA
4–20 mA US
22.6 mA
4–20 mA (25 mA) HART
25 mA
4–20 mA HART NAMUR
22.6 mA
4–20 mA HART US
22.6 mA
ACTUAL VALUE
Fault is ignored, i.e. standard measured value output on the basis of ongoing flow
measurement (not recommended).
Output signal corresponds to "zero flow"
Pulse output
MINIMUM/MAXIMUM VALUE
FALLBACK VALUE
Signal output
No pulses
ACTUAL VALUE
Fault is ignored, i.e. standard measured value output on the basis of ongoing flow
measurement.
Output signal corresponds to "zero flow"
Totalizer
MINIMUM/MAXIMUM VALUE
STOP
The totalizer is paused until the fault is rectified.
ACTUAL VALUE
The fault is ignored. The totalizer continues to count in accordance with the current flow
value.
Totalizer stops
Status output
In the event of fault or power supply failure: status output
Non-conductive
No effect on status output
