Configuration
4.10 Data points
CP 1243-1
Operating Instructions, 04/2017, C79000-G8976-C365-03
95
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
6
5
4
3
2
1
0
Flag name
-
NON_
EXISTENT
Substituted LOCAL_
FORCED
CARRY
OVER_
RANGE
RESTART
ONLINE
Meaning
-
Data point
does not
exist or S7
address
unreachable
Substitute
value
Local opera-
tor control
Counted
value over-
flow before
reading the
value
Limit value
of the ana-
log prepro-
cessing
overshot /
undershot
Value not
yet updated
after start
Value is
valid
Bit status
(always
0)
1
1
1
1
1
1
1
