Data Point Mapping - Siemens S7 Series Communication Instruction Manual

3 Mode of Operation
3.2

Data point mapping

The following figure shows all of the data used and the process image of the S7-
1200 CPU for the configuration with the gateway.
Please note: The input or output signal type always refers to the "perspective" of
the respective device.
Figure 3-2: Interaction between the process image of the S7 CPU and the data points in the gateway
S7-1200 CPU
Process image
I/O Address Name
PLC_1 DI14 I 0 *
Integrated
PLC_1 DO10_1 O 0 *
INPUT_32B_1 I readValInt
100..131
OUTPUT_32B_1 O readValBool
100..131
readTemprInt REAL
setValInt
setValBool
Note *Compact CPUs (e.g., S7-1200) with integrated digital inputs and outputs:
In STEP 7 (TIA Portal), the smallest address 0 is automatically assigned to the
integrated digital inputs and outputs.
Other modules / I/O are automatically assigned to the next available address.
Here, the address space starting with 100 was selected in the process image.
This makes it easier to identify the connected tags between the S7-1200 CPU
and the gateway.
Communication with S7 CPU via KNX Gateway
Entry ID: 109739689, V1.0,
PLC tags
PROFINET
Data type Address
Length
I/O
INT IW 100
2 bytes
BOOL O 102.0
1 bit
ID 103
4 bytes
INT OW 100
2 bytes
O 102.0
BOOL
1 bit
06/2017
Gateway
Data points
PROFINET
Name Format Address
Length
SINT16 S inbyte 0
KNX-->S7
value 2 bytes
KNX-->S7 BIT S inbit 2.0
switch 1 bit
KNX-->S7 FLOAT32 Y inbyte 3
temperature 4 bytes
S7-->KNX
SINT16 M outbyte 0
value 2 bytes
S7-->KNX BIT M outbit 2.0
statusLED 1 bit
EIB/KNX
KNX
Format Address
Length
SINT16 M 1/1/1
2 bytes
UINT1 M 1/1/3
1 bit
SFLOAT X 1/1/5
2 bytes
SINT16 S 1/1/2
2 bytes
S 1/1/4
UINT1
1 bit
11