Proline Promag 51
Troubleshooting
Hauser
71
9.5
Response of outputs to errors
!
Note!
The failsafe mode of totalizers, current, pulse and frequency outputs can be customized by means
of various functions in the function matrix. You will find detailed information on these procedures
in the "Description of Device Functions" manual.
You can use positive zero return to set the signals of the current, pulse and status outputs to their
fallback value, for example when measuring 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 current
Positive zero return activated
"
Caution!
System or process errors that have been defined as "notice messages" have no effect on the inputs and outputs. Please
refer to the information on
44.
Current output
MINIMUM VALUE
0–20 mA
0 mA
4–20 mA
2 mA
4–20 mA HART
2 mA
4–20 mA NAMUR
3.5 mA
4–20 mA HART NAMUR
3.5 mA
4–20 mA US
3.75 mA
4–20 mA HART US
3.75 mA
0–20 mA (25 mA)
0 mA
4–20 mA (25 mA)
2 mA
4–20 mA (25 mA) HART
2 mA
MAXIMUM VALUE
0–20 mA
22 mA
4–20 mA
22 mA
4–20 mA HART
22 mA
4–20 mA NAMUR
22.6 mA
4–20 mA HART NAMUR
22.6 mA
4–20 mA US
22.6 mA
4–20 mA HART US
22.6 mA
0–20 mA (25 mA)
25 mA
4–20 mA (25 mA)
25 mA
4–20 mA (25 mA) HART
25 mA
ACTUAL VALUE
Measured value display on the basis of the current flow
measurement. The fault is ignored.
Output signal corresponds to
“zero flow”
Pulse output
MIN/MAX VALUE
FALLBACK VALUE
1)
Signal output
no pulses
Output signal corresponds to
"zero flow"
ACTUAL VALUE
Fault is ignored, i.e. normal measured value output on the basis of
ongoing flow measurement.
Frequency
output
FALLBACK VALUE
Signal output
0 Hz
Output signal corresponds to
"zero flow"
FAILSAFE LEVEL
Output of the frequency specified in the FAILSAFE VALUE
function.
HOLD VALUE
Measured value display on the basis of the last saved
value preceding occurrence of the fault.
ACTUAL VALUE
Measured value display on the basis of the current flow
measurement. The fault is ignored.
