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Configuration and operation
5.7 Types of transmission, event classes, triggers, status identifiers
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 status "RESTART" of a data point configured as an event changes to "Value
updated" when the station starts up, this causes an event to be generated.
Status IDs of data points
The status IDs listed in the following tables are transferred for each data point in each frame
in 1 byte.
The meaning relates to the bit status in the last row of each table.
Table 5- 2
Byte assignment of the status byte for data points
Bit
7
Flag name
-
Meaning
-
(always 0)
Bit status
38
6
5
NON_
SB
Substituted
EXISTENT
Data point
Substitute
does not
value
exist or S7
address
unreacha-
ble
1
1
4
3
LOCAL_
CY
FORCED
CARRY
Local oper-
Counted
ator control
value over-
flow before
reading the
value
1
1
Operating Instructions, 02/2015, C79000-G8976-C384-01
2
1
OVER_
RESTART
RANGE
Analog
Value not
value: Val-
updated
ue range
after start
exceeded
1
1
0
ONLINE
Value is
invalid
1
CP 1243-1 PCC
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