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Pepperl+Fuchs Podcasts

Pepperl+Fuchs’ TechTalk helps listeners gain an insight into modern automation technologies by focusing on AS-Interface (Actuator Sensor Interface) and its associated safety technology, Safety at Work. TechTalk covers topics that range from hardware selection to installation and maintenance. Control engineers familiar with AS-Interface will get the latest news on specification enhancements, hear about new products, and familiarize themselves with established and cutting-edge troubleshooting methods, tips, and tricks.  Users who are interested in applying these technologies will learn what it takes to set up an AS-Interface system, how Safety at Work improves safety systems, and why those technologies have the potential to save time and money during all phases of a project.

Sep 21, 2014

AS-Interface Safety Code Substitution -- In this episode Tim mentions that AS-Interface Safety at Work is based on the transmission of dynamic data called the "safety code". While the dynamics of the data is required so that the Safety Monitor can determine what is going on at the safe inputs. To simplify diagnostics logic on the PLC, a simple code substitution procedure was introduced several years ago.  The latest generation of AS-Interface gateways with integrated safety controller took this a step further. With this diagnostic code substitution it is possible to:

  • --Know which safety contact is open and which contact is closed (red/green/grey)
  • --Identify if a safety device requires testing (yellow flashing)
  • --Detect if a safety device caused a critical error (red flashing)
  • --See if a device is 'ready", awaiting for instance a RESET (yellow)