Description Of The Core Functionality - Siemens S7 Series Communication Instruction Manual

2 Solution
2.2

Description of the core functionality

Configuration
The connection between the S7-1200 CPU and the gateway is configured via

the configuration of the gateway as distributed I/O in STEP 7 (TIA Portal).

configuration files of the gateway (cfg and txt files) (see
reference each other.
The configuration files are downloaded to the gateway using the integrated web
server or directly edited.
Configuring and programming the gateway requires no ETS software. The gateway
can access existing data points (group addresses) in the KNX network and provide
its own data points locally on the gateway.
The assignment of the devices' group addresses and physical addresses is not
part of this description. For more information, please refer to the supplied ETS5
sample project. The gateway's physical address (KNX) is set using the "eib1.cfg"
configuration file (see 4.4.3).
Function and data types
This application example contains a STEP 7 project and a data record for the
gateway, where data of different data types is exchanged between an S7-1200
CPU and KNX devices in both directions via the gateway. A decimal value is
transferred from the S7-1200 CPU to the KNX control room unit's display and a
status LED of the KNX wall switch is controlled via a binary signal. Conversely, the
value of the integrated temperature sensor and a configurable decimal value are
transferred from the KNX room control unit. Using the KNX wall switch, a boolean
variable is set/reset in the S7-1200 CPU.
The following data types are used and parameterized:
Table 2-2: SIMATIC / gateway data types
SIMATIC (S7-1200
CPU)
BOOL
REAL
Communication with S7 CPU via KNX Gateway
Entry ID: 109739689, V1.0,
PROFINET
↔
↔
INT SINT16
←
FLOAT32
06/2017
Gateway
KNX
BIT UINT1
SINT16
SFLOAT
Figure 3-3) that
KNX
↔
DPT-1
↔
DPT-7
←
DPT-9
7