Configuration
4.18 Data points
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
143
"General" tab
"General" tab
Data point index
With the DNP3 and IEC protocols the index is an addressing parameter for a data point.
Below you will find the rules for configuring in the section Configuration of the data point
index (Page 144).
In ST7 a data point is addressed by the object number and the channel (see below).
For the CP the following transmission types are available: Triggering assigns the data point
an event class.
● Transfer after call
The current value of the data point is entered in the image memory of the CP.
● Every value triggered
Each value change is entered in the send buffer in chronological order.
● Current value triggered
Only the current value is entered in the send buffer.
See section Process image, type of transmission, event classes (Page 144) for information
on this.
Prioritizes the reading or writing of the data point value in the scan cycle of the CPU.
See section Read cycle (Page 147) for information on this.
The object number must be unique and the maximum permitted number of data points per
SINAUT object must not be exceeded. Refer to the column “Number of data points per
SINAUT object” in the section Datapoint types (Page 135).
The object channel is the channel of the corresponding SINAUT object.
Partner object number (ST7)
Per object number, you need to specify a unique object number of the communications
partner.
This must result in unique pairs of "Object number" and "Partner object number".
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