Configuration
3.20 Configuring data points
Configuration - DNP3
112
Configuration Manual, 11/2018, C79000-G8976-C508-01
With the data point types Binary Output Event (11) and Analog Output Event (42), you also
need to enable mirroring; refer to the next paragraph.
Configuration of mirroring for output events (object groups 11 and 42)
You first create the data point types Binary Output Event (object group 11) and Analog
Output Event (object group 42) as described above as data points of the object groups 12 or
41.
The local values of these two object groups can be monitored for changes and the changes
transferred to the master. Changing a local value can, for example, be caused by manual
operator input on site.
To allow the value resulting from local events or interventions to be transferred to the master,
the data point in question requires a channel for mirroring back. You configure this mirroring
back function using the "Value monitoring" option in data point configuration, "General" tab.
Remember that to use the mirror back function, you need to interconnect the local values in
the controller with the relevant PLC tag of the data point.
Time stamp of the data with the DNP3 protocol in UTC format
Time stamps are transferred in UTC format (48 bits) and contain milliseconds.
3.20.3
"General" tab
General
You will also the most important parameters in the first tab of the data point editor in the data
point table.
●
Data source
–
Name: Unique name of the data point
–
For the assignment of the PLC tabs, see section Data point configuration (Page 103).
–
For the data point type, see section Datapoint types (Page 109).
–
For the data point index, see section Rules for configuring the data point index:
(Page 113).
●
Master function
–
Option enabled
The values of the data point are sent as for a master:
–
- Input data points are received.
- Output data points are sent.
–
Option disabled
The data point can be used for 'direct communication' between stations:
- Input data points can be received and sent.
- Output data points can be sent and received.
For direct communication, enable also the "Spontaneous" parameter in the DNP3
connection.
