Configuration
3.20 Configuring data points
Configuration - DNP3
Configuration Manual, 11/2018, C79000-G8976-C508-01
117
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Event trigger (Trigger tag)
The value of the data point is saved when a configurable trigger signal is fired. For the
trigger signal, the edge change (0 → 1) of a trigger tag is evaluated that is set by the user
program. When necessary, a separate trigger tag can be configured for each data point.
Resetting the trigger tag in the bit memory area / DB:
If the memory area of a trigger tag is in the bit memory or in a data block, the module
resets the trigger tag itself to 0 (zero) as soon as the value of the data point has been
transferred. This can take up to 500 milliseconds.
Note
Fast setting of triggers
Triggers must not be set faster than a minimum interval of 50
0 milliseconds. This also
applies to hardware triggers (input area).
Note
Hardware trigger
You need to reset hardware triggers via the user program
Whether the value of an event is transmitted to the communication partner immediately after
activating the trigger or with a delay depends on whether spontaneous sending or
asymmetric communication is possible in the network.
You set the spontaneous transfer of events in the "Network data" editor of the telecontrol
connections for each connection segment using the "Spontaneous" parameter.
Note
Threshold value trigger: Calculation only after "Analog value preprocessing"
Note that the analog value preprocessing is performed before the check for a
configured
threshold value and before calculating the threshold value.
This affects the value that is configured for the threshold value trigger.
Note
No Threshold value trigger if Mean value generation is configured
If mean value generation is config
ured, no threshold value trigger can be configured for the
analog value event involved.
For the time sequence of the analog value preprocessing refer to the section Analog value
preprocessing (Page 119).
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