Response Of Outputs To Errors - Endress+Hauser PROline promag 10 Operating Instructions Manual

PROline Promag 10
!
Endress+Hauser
9.5

Response of outputs to errors

Note!
The response of the totalizers and current, pulse and status outputs to error can be
configured by means of the central function FAILSAFE MODE ( → Page 112).
Positive zero return and error response:
You can use positive zero return to set the signals of the current, pulse and status
outputs to their fallback value, for example when operation has to be interrupted while
a pipe is being cleaned.
This function has priority over all other device functions; simulations are suppressed, for
example.
Response of outputs and totalizers to errors
Process/system error present
"
Caution!
System or process errors defined as "Notice messages" have no effect whatsoever
on the inputs and outputs! Please refer also to the information on Page 51 ff.
Current output MIN.VALUE
4–20 mA (25 mA)
4–20 mA NAMUR
4–20 mA US
4–20 mA (25 mA) HART
4–20 mA HART NAMUR
4–20 mA HART US
MAX.VALUE
4–20 mA (25 mA)
4–20 mA NAMUR
4–20 mA US
4–20 mA (25 mA) HART
4–20 mA HART NAMUR
4–20 mA HART US
ACTUAL VALUE
Fault is ignored, i.e. standard measured value
output on the basis of ongoing flow
measurement.
MINIMUM/MAXIMUM VALUE i FALLBACK
Pulse output
VALUE
Signal output
ACTUAL VALUE
Fault is ignored, i.e. standard measured value
output on the basis of ongoing flow
measurement.
MINIMUM/MAXIMUM VALUE i STOP
Totalizer
The totalizer is paused until the fault is
rectified.
ACTUAL VALUE
The fault is ignored. The totalizers continue to
count in accordance with the current flow
value.
Status output In event of fault or power supply failure:
Status output
→
2 mA
→
3.5 mA
→
3.75 mA
→
2 mA
→
3.5 mA
→
3.75 mA
→
25mA
→
22.6 mA
→
22.6 mA
→
25 mA
→
22.6 mA
→
22.6 mA
→
No pulses
→
not conductive
9 Trouble-shooting
Positive zero return activated
Output signal corresponds to
"zero flow"
Output signal corresponds to
"zero flow"
Totalizer stops
No effect on
status output
71