Siemens ET 200SP Operating Instructions Manual page 66

Configuration and operation
4.5 Telecontrol communication (CP 1542SP-1 IRC)
● DNP3
The evaluation of the following classification must be handled by the master.
– Event class 1
– Event class 2
– Event class 3
● IEC
Both of the following event classes correspond to the user data class 1 of the IEC
protocol
– Every value triggered
– Current value triggered
Trigger
Trigger types
Various trigger types are available for event-driven transfer:
● Threshold value trigger
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 73).
● Time trigger
The value of the data point is transferred at configurable intervals or at a specific time of
day.
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Class according to DNP3 protocol: Class 1
Each value change is entered in the send buffer in chronological order.
Class according to DNP3 protocol: Class 2
Each value change is entered in the send buffer in chronological order.
Class according to DNP3 protocol: Class 3
Only the current value at the time the trigger condition is met is entered in the send
buffer and overwrites the last value stored there.
Each value change is entered in the send buffer in chronological order.
Only the current value at the time the trigger condition is met is entered in the send
buffer and overwrites the last value stored there.
CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1
Operating Instructions, 01/2017, C79000-G8976-C426-03