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Profibus
Published in Richard Zurawski, Industrial Communication Technology Handbook, 2017
Ulrich Jecht, Wolfgang Stripf, Peter Wenzel
PROFIsafe is a comprehensive, open fieldbus solution for safety-relevant applications without the use of a second relay-based layer or proprietary safety buses. PROFIsafe defines how fail-safe devices (emergency stop pushbuttons, light curtains, level switches, etc.) can communicate over PROFIBUS with fail-safe controllers in such a manner that they can be used for safety-relevant automation tasks up to category 4 compliant with EN954 (ISO 13849) or SIL3 (Safety Integrity Level) according to IEC 61508. It implements safe communications over a profile, that is, over a special PROFIsafe data frame and a special protocol. PROFIsafe is a single-channel software solution, which is implemented in the devices as an additional layer above layer 7 (Figure 11.14); the standard PROFIBUS components, such as lines, ASICs, or protocols, remain unchanged. This ensures redundancy mode and retrofit capability. Devices with the PROFIsafe profile can be operated in coexistence with standard devices without restriction on the same bus (cable).
Profibus
Published in Sunit Kumar Sen, Fieldbus and Networking in Process Automation, 2017
PROFIsafe defines how fail-safe devices such as emergency stop pushbuttons can communicate over PROFIBUS with the help of fail-safe controllers. This safety-related automation task can be used up to KAT4 compliant with EN954 or Safety Integrated Level (SIL3). This is implemented over a special format of user data and a special protocol. PROFIsafe increases the transmission safety of the PROFIBUS protocol.
Understanding vulnerabilities in cyber physical production systems
Published in International Journal of Computer Integrated Manufacturing, 2021
Azfar Khalid, Zeashan Hameed Khan, Muhammad Idrees, Pierre Kirisci, Zied Ghrairi, Klaus-Dieter Thoben, Jürgen Pannek
A physical research demonstrator of this HRC representative scenario has been implemented with off-the-shelf components. The demonstrator consists of a heavy payload robot from FANUC (R-2000iB 165 F), a robot controller (R30iA), an industrial PC (Siemens) with ProfiNet/ProfiSafe interfaces, as well as two safety laser scanners (SICK S3000), two HD cameras and a wearable 3D motion capturing system. The concept of the demonstrator relies upon a sensor framework, which enables the ad-hoc integration of potential cyber-physical components, whereas the sensor data is collected and sensor fusion takes place in the environment of the industrial-PC. The laser scanner detects the human presence in the robot cell, whereas the two overhead HD cameras cover the visual surveillance of the cell. The human worker signature is recorded by the inertial measurement unit (IMU) fitted bodysuit, which is a must wearable in this case and communicates data wirelessly to the server. For this purpose, the hardware components such as PLC and sensors are coupled with the simulation environment (hardware-in-the-loop), and robot control and sensor data are used within the simulation for safety distance computation, implementation of human avoidance algorithm and speed reduction upon detection, thereby controlling the system through the cyber component of the CPPS.