Current outputs: Behavior during messages
NAMUR signals: Current outputs
Behavior during messages: Function check, 22 mA signal
Behavior during messages
Behavior during messages (Administrator)
Function check
22mA message
Abort
Output current
[mA]
22
4
Message when the current range is exceeded
As delivered, a "Warning" (maintenance request) message is generated
when the current range is exceeded (< 3.8 mA or > 20.5 mA).
This setting can be changed in the Parameter setting menu of the respective
measuring module at "Messages".
To generate a "Failure" message, the limit value monitoring must be set to
"Variable limits":
Parameter setting - <measuring module> - Messages - Variable limits -
Failure limit ...
Enter the same values for the failure limits as for the current output:
Parameter setting - Module BASE - Output current - Variable Start / End.
Depending on the parameter setting
7.00 pH
19.0 °C
("Messages"), the current outputs switch to:
Current meas.
Last usable value
•
Fixed 22 mA
•
•
In the case of a fault a 22 mA signal can be
OK
generated for the selected process variable
(1st primary value).
"Current meas."
Function
check
Currently measured value
Last measured value (HOLD function)
Fixed value (22 mA)
"Last usable value"
Function
check
"Fixed (22 mA)"
Function
check
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