Codesys Safety Programming Guidelines; Overview; Framework - ABB AC500-S Safety User Manual

Configuration and programming
CODESYS Safety programming guidelines > Framework

4.4 CODESYS Safety programming guidelines

This chapter and sub-chapters present an extract of AC500-S safety CPU relevant rules from
CODESYS V2.3.x safety guidelines

4.4.1 Overview

CODESYS is usually used for creating non-safety applications. CODESYS is also suitable for
creating safety applications of certain classes if it is used in a suitable environment in conjunc-
tion with controllers like AC500-S, specially approved for this purpose. However, this requires
certain guidelines to be followed, which are described in this document.
4.4.1.1 Target group
This document is aimed at users who wish to create safety applications with CODESYS.
It also serves as a basis for testers who approve safety applications.
4.4.1.2 Requirements
To understand this document, knowledge of IEC 61131-3
gramming system, is required.
Experience with the creation of safety applications is helpful.
4.4.1.3 Terms
Output
Output parameter - VAR_OUTPUT of a program or function block
Inputs
Input parameter

4.4.2 Framework

4.4.2.1 Safety integrity level (SIL)
CODESYS is suitable for creating applications up to SIL 3. The use of CODESYS is not per-
mitted for higher levels.
4.4.2.2 Approved CODESYS version
The following product component versions are approved for creating safety applications:
Type of product component
Programming system
The CODESYS version can be checked via "Help è About". The correct version of the runtime
system is indicated by SIL 3 approval of the control system through the German Technical
Inspection Association (TÜV SÜD).
172
Ä [1].
- Variable that is mapped to an IEC output address (%Q)
- Variable that is mapped to an IEC input address (%I)
- VAR_INPUT of a program, function or function block
Name of product component
CODESYS
3ADR025091M0208, 12, en_US
Ä [5], particularly the CODESYS pro-
Version (date)
2.3.9.9 or higher
2020/06/19