Functional Safety Seminar – an Introduction based on Requirement for Automation Drives


PCIM EUROPE 2019 brings leading minds in power electronics to the stage:

Functional Safety – an Introduction based on Requirement for Automation Drives
Jens Onno Krah, Cologne University of Applied Sciences

Sunday, 5 May 2019, 14:00 – 17:30 hrs, Arvena Park Hotel Nuremberg, Görlitzer Str. 51, 90473 Nuremberg Germany.

Functional safety is increasingly requested for drives. Safe Torque Off (STO) is now standard on many frequency inverters and servo drives. Safe motion and safety related field buses are an increasing demand. The technical basics of functional safety are explained in the seminar:

Explanation of Safety Keywords

  • Mean Time To Fail (MTTF), Failure In Time (FIT), Safe Failure Fraction (SFF), Diagnostic Coverage (DC), Fail Safe – Fail Silent, Fail Operational, Fault Exclusion, Category, Performance Level (PL), Safety Integrity Level (SIL)
  • Safe Digital Input
  • Testing, calculation of FIT, DC and SFF
  • Safe Digital Output
  • Testing, calculation of FIT, DC and SFF
  • Safe Torque OFF (STO)

Basic techniques to implement STO

  • Safe Brake Control (SBC)
  • Safety Related Fieldbus Technology

Black Channel, Cyclic Redundancy Check (CRC), PROFIsafe, FSoE

  • Safety Related Motor Feedback
  • Utilizing two feedback devices
  • Analog interface: Sin-Cos Encoder, Resolver / Digital Interface: Single-Turn, Multi-Turn
  • EnDAT, BiSS, Hiperface DSL, SCS open link
  • Safe Motion (IEC 61800-5-2)
  • Safe Limited Speed (SLS) / Safe Limited Position (SLP), etc.
  • Safe Logic
  • Environment Requirements
  • Power Supply
  • Clock, Voltage and Temperature Monitoring
  • Safe Logic Implementation
  • Redundancy, Diversity
  • Dual CPU, Lockstep CPU, FPGA
  • Error Correction Code (ECC)
  • Watchdog
  • Build In Self-Test (BIST), Self-Test Library (STL)

Who should attend?
This seminar is intended for designers and engineers involved in frequency inverter and servo drive design for automation. It assumes a working knowledge of electrical engineering basics and a familiarity with inverter design principles. Knowledge of functional safety is not necessary.