PLCopen Releases Version 2.0 of the Security Specification Part 1

 PLCopen Releases Version 2.0 of the Security Specification Part 1 

  PLCopen Releases Version 2.0 of the Security Specification Part 1

28. November 2018 - In February 2006, PLCopen released the safety specification Part 1 - Safety Function Concepts and Function Blocks, followed by User Guidelines and Additional Parts.

The original document describes the functionalities as well as comprehensive state diagrams that contribute to the understanding, references to the applicable standards, description of the error behavior, function tests and error codes and identify various programming levels. As such, it is an ideal platform for implementers. Of course, additional information on safety devices, connections and wiring is required for the users.

After so many years, an update was required that led to version 2.0 of this document, which was released earlier this year. This version contains many changes:

  1. Contains the original part 3, in particular the section on diagnostics and the additional 5 function blocks.
  2. In addition, the ST language is added for structured text as well as additional data types and functionalities. 19659006] All original function blocks have been updated Diagnostic codes, the safety request and the resetting of the outputs have been requested, and the reset function has been extended to the trailing edge by defining a new function block.
  3. In addition, 3 motion-related function blocks have been removed and added to a separate document in SafeMotion

The general basic requirements for a safety application for machine builders within all applicable safety standards are:

  1. distinction between safety and non-safety functions
  2. Use of applicable Programming languages ​​and language subgroups
  3. Use of validated software building blocks
  4. Use of applicable programming guidelines
  5. Use of accepted fault reduction measures for the safety software life cycle

For users, the effort required to meet these high requirements should be reduced. This can be done with standardized solutions that can easily implement typical functionalities. By standardizing functional building blocks and integrating and supporting software tools, programmers can integrate security into their applications right from the start, without compromising their functionality and performance and without incurring additional costs.

The technical working group of PLCopen developed this specification the basic safety requirements. For this purpose, the PLCopen committees identified two levels:

  1. Integration of standard procedures into the development environment
  2. Standardization in the look and feel of security function modules

These include:

  1. Representation of the software architecture [19659006] Definition of programming languages ​​[19659006] Representation of security-related data types
  2. Definition of language subgroups
  3. Definition of user levels for simple programming and error prevention
  4. Error handling and diagnostic concept
  5. Definition of a generic safety-related function module
  6. Definition of a set of 22 safety-relevant function modules
  7. The definition of a PLCopen compliance method in connection with the use of the PLCopen Safety logo

The resulting document consists essentially of three parts:

  1. Reduction of the programming languages ​​and functions to the Er [safety code]
  2. General rules for safety-related function blocks
  3. Definition of a set of function blocks with safety-related functions

This new version 2.0 of the PLCopen safety specification Part 1 can be downloaded from to be downloaded.

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2018-11-28 21:44:48
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