Siemens S7 Series User Manual

6 Operation of the Application Example
Communication with S7 CPU via KNX Gateway
Entry ID: 109739689, V1.0, 06/2017
33
 Siemens AG 2017 All rights reserved
6 Operation of the Application Example
You can verify communication between the S7-1200 and the KNX devices using
the watch table in TIA Portal and the functions of the KNX devices.
Table 6-1: Monitoring and modifying tags using the watch table
No.
Action
Comment
1.
In STEP 7 (TIA Portal), open the
“WatchTableUGW” watch table.
2.
1. Click the “Monitor all” button.
2. Monitor the room temperature of the KNX
room control unit.
3.
Compare the room temperature from the
watch table with the display in the KNX room
control unit.
4.
On the KNX room control unit, navigate to the
“SET” function named “KNXS7” and set a
new value.
5.
In the watch table, monitor the value change of
the “readValInt” tag.
2

Siemens S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Memory	Varies by model (e.g., 64 KB to 20 MB)
Communication Interfaces	PROFINET, PROFIBUS, Ethernet, MPI
I/O Modules	Digital Input (DI), Digital Output (DO), Analog Input (AI), Analog Output (AO)
Programming	STEP 7 (TIA Portal) programming software. Supports various programming languages and provides tools for configuration, diagnostics, and commissioning.
Power Supply	24 V DC, 120/230 V AC. Integrated or external power supply, depending on the CPU and system configuration.
Operating Temperature	Typically 0 to 60 °C (horizontal mounting), -20 to 60°C (vertical mounting), depending on the specific module.
Product Type Designation	S7-300, S7-400, S7-1200, S7-1500
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Digital Inputs	Varies by module (e.g., 8, 16, 32 channels)
Digital Outputs	Varies by module (e.g., 8, 16, 32 channels)
Analog Inputs	Varies by module (e.g., 2, 4, 8 channels)
Analog Outputs	Varies by module (e.g., 2, 4, 8 channels)
Operating Voltage	24V DC or 120/230V AC (varies by model)
CPU Processing Speed	Varies by model (e.g., 0.1 ms to 5 ns per instruction)
Real-time Clock	Integrated (varies by model)
Mounting Type	DIN rail mounting.
Protection Class	IP20