Configuration
3.20 Configuring data points
Configuration - DNP3
116 Configuration Manual, 11/2018, C79000-G8976-C508-01
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In every cycle, the values of a certain number of unsolicited write jobs are written to the
CPU.
The number of tags written per cycle is specified for the transferring module in the
"Communication with the CPU" parameter group with the "Max. number of write jobs"
parameter. The tags whose number exceeds this value are then written in the next or one
of the following cycles.
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Low-priority read jobs - proportion
For data points with the assignment "Normal cycle", a proportion of the values of their
PLC tags is read in every scan cycle.
The number of tags read per cycle is specified for the transferring module in the
"Communication with the CPU" parameter group with the "Max. number of read jobs"
parameter. The tags that exceed this value and can therefore not be read in one cycle
are then read in the next or one of the following cycles.
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This waiting time between two scan cycles is used to reserve adequate time for other
processes that access the CPU.
Data points are configured as a static value or as an event using the "Type of transmission"
parameter:
Saving the value of a data point configured as an event
Saving the value of a data point configured as an event in the send buffer (message
memory) can be triggered by various trigger types:
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The value of the data point is saved when this reaches a certain threshold. The threshold
is calculated as the difference compared with the last stored value, refer to the section
Threshold value trigger (Page 117).
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The value of the data point is saved at configurable intervals or at a specific time of day.
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