Configuration
4.18 Data points
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
147
Event classes with the "Triggered" type of transmission
Depending on the protocol used the following event classes are available:
●
TeleControl Basic / ST7
–
Every value triggered
Each value change is entered in the send buffer in chronological order.
–
Current value triggered
Only the last, current value is entered in the send buffer. It overwrites the value stored
there previously.
●
DNP3
The evaluation of the following classification must be handled by the master.
–
Event class 1
Class according to DNP3 protocol: Class 1
Each value change is entered in the send buffer in chronological order.
–
Event class 2
Class according to DNP3 protocol: Class 2
Each value change is entered in the send buffer in chronological order.
–
Event class 3
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.
●
IEC
Both of the following event classes correspond to the user data class 1 of the IEC
protocol
–
Every value triggered
Each value change is entered in the send buffer in chronological order.
–
Current value triggered
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.
For the possible trigger types, see section "Trigger“ tab (Page 148).
4.18.8
Read cycle
Priority of the data points
The cyclic reading of the values of input data points from their assigned PLC tags on the
CPU can be prioritized.
