Configuration
4.9 Data points
CP 1243-1
Operating Instructions, 12/2016, C79000-G8976-C365-02
77
When data points are configured as an event via the "Type of transmission" parameter,
the following event classes are available:
–
Each value change is entered in the send buffer in chronological order.
–
Only the last current value is entered in the send buffer. It overwrites the value stored
there previously.
Various trigger types are available for event-driven transfer:
●
The value of the data point is transferred 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 79).
●
The value of the data point is transferred at configurable intervals or at a specific time of
day.
●
The value of the data point is transferred when a configurable trigger signal is fired. As
the trigger signal, the edge change (0 → 1) of a trigger bit is evaluated that is set by the
user program. When necessary, a separate trigger bit can be configured for each data
point.
Resetting the trigger tag in the bit memory area / DB:
If the memory area of the trigger tag is in the bit memory or in a data block, the trigger tag
is reset to zero when the data point value is transferred.
Transmission time of the frame (Transmission mode)
Whether the value of a data point is transferred to the communications partner immediately
after the trigger fires or after a delay depends on the setting of the parameter "Transmission
mode" in the "Trigger" tab of the data point:
●
The value is transferred immediately.
●
The value is transferred only when one of the two following conditions is fulfilled:
– The telecontrol server queries the station.
– The value of another event with the transmission mode "Unsolicited" is transferred.
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