Siemens SIMATIC NET ET 200SP - Rules for Configuring the Data Point Index

Configuration and operation
4.5 Telecontrol communication (CP 1542SP-1 IRC)
CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1
Operating Instructions, 01/2017, C79000-G8976-C426-03
69
Status IDs - IEC
The status IDs can be evaluated by the master. They correspond to the following elements
of the specification:
Quality descriptor - IEC 60870 Part 5-101
Table 4- 6 Bit assignment of the status byte
Bit
7
6
5
4
3
2
1
0
Flag name
- - SB
substituted
- CY
carry
OV
overflow
NT
not topical
IV
invalid
Meaning
- - Substitute
value
- Counted
value over-
flow before
reading the
value
Value range
exceeded,
analog value
Value not
updated
Value is valid
Bit status
(always
0)
(always
0)
1
(always
0)
1 1 1 0
4.5.7.5
Rules for configuring the data point index:
Configuration of the data point index
Below you will find the configuration rules for the data point index depending on the protocol
being used.
TeleControl Basic
Within a CP, the indexes of the data point classes must comply with the following rules:
● Input
The index of a data point of the type input must be unique throughout all data point types
(digital inputs, analog inputs etc.).
● Output
– A data point of the type output can have the same index as a data point of the type
input.
– Several data points of the type output can have the same index.
Note
Data points for the inter-station communication with a CP in another S7 station
Note tha
t for inter-station communication, the indexes of the two corresponding data points
(data point pair) must be identical for the sending and receiving CP.