Status Ids Of The Data Points - Siemens CP 1243-1 Operating Instructions Manual

4.10.5

Status IDs of the data points

Status identifiers
The status identifiers of the data points listed in the following tables are transferred along
with the value in each frame to the communications partner. They can be evaluated by the
communications partner.
The entries in the table row "Significance" relate to the entry in the table row "Bit status".
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 TeleControl Basic protocol
Depending on their status, the status bits (see table) are converted to the OPC quality code
by TCSB.
● Quality = BAD
Bit 2 or 7 = 1
● Quality = UNCERTAIN
Bit 1 or 3 or 5 = 1
● Quality = GOOD
Bits 1 and 2 and 3 and 5 and 6 = 0
Table 4- 4 Bit assignment of status byte 0
Bit 7
Flag name - NON_
EXISTENT
Meaning - Data point
does not
exist or S7
address
unreachable
(always
Bit status
0)
CP 1243-1
Operating Instructions, 04/2017, C79000-G8976-C365-03
6 5
Substituted LOCAL_
FORCED
Substitute Local opera-
value tor control
1 1
4 3
CARRY OVER_
RANGE
Counted Limit value
value over- of the ana-
flow before log prepro-
reading the cessing
value overshot /
undershot
1 1
Configuration
4.10 Data points
2 1
RESTART ONLINE
Value not Value is
yet updated valid
after start
1 1
0
1
95