Configuration
4.18 Data points
CP 1243-8 IRC
142 Operating Instructions, 02/2018, C79000-G8976-C385-03
Generation of events if a data point status changes
With data points that were configured as an event, the change to the status bit of the status
identifiers described below also leads to an event being generated.
Example: If the value of the status "RESTART" of a data point configured as an event
changes form 1 (value not yet updated) to 0 (value updated) when the station starts up, this
causes an event to be generated.
Status identifiers with the DNP3 protocol
The status IDs correspond to the following elements of the specification:
OBJECT FLAGS - DNP3 Specification, Volume 6, Data Object Library - Part 1
Table 4- 7 Bit assignment of the status byte
- - - LOCAL_
DISCONTI
OVER_
RESTART ONLINE
- - - Local opera-
tor control
Counted
value over-
flow before
reading the
value
Limit value of
the analog
prepro-
cessing over-
shot /
Value not yet
updated after
start
Value is valid
1 1 1 1 1
Status identifiers with the IEC protocol
The status IDs correspond to the following elements of the specification:
Quality descriptor - IEC 60870 Part 5-101
Table 4- 8 Bit assignment of the status byte
- - SB
- CY
OV
NT
IV
- - Substitute
value
- Counted
value over-
flow before
reading the
Value range
exceeded,
analog value
Value not
updated
Value is valid
1
1 1 1 0
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