Siemens CP 1243-1 PCC

Configuration and operation
5.7 Types of transmission, event classes, triggers, status identifiers
CP 1243-1 PCC
38 Operating Instructions, 02/2015, C79000-G8976-C384-01
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
6
5
4
3
2
1
0
Flag name
- NON_
EXISTENT
SB
Substituted
LOCAL_
FORCED
CY
CARRY
OVER_
RANGE
RESTART ONLINE
Meaning
- Data point
does not
exist or S7
address
unreacha-
ble
Substitute
value
Local oper-
ator control
Counted
value over-
flow before
reading the
value
Analog
value: Val-
ue range
exceeded
Value not
updated
after start
Value is
invalid
Bit status
(always 0)
1
1
1
1
1
1
1