CODESYS BACnet SL is a product that extends the functionality of a device to implementing ANSI/ASHRAE Standard 135-2012 compliant applications in building management systems. This function is integrated directly into the CODESYS Development System.

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CODESYS BACnet SL consists of a BACnet runtime component that is accessed by the IEC application. With CODESYS BACnet SL, applications are equipped with a BACnet interface in the CODESYS Development System. In a building management system that is based on BACnet, applications can be monitored and controlled by means of the BACnet protocol.

Integrated libraries, devices, and plug-ins allow for project engineering and implementation of an application with BACnet support. For example, to provide an analog value (BACnet Analog Value) in the BACnet network, an appropriate BACnet Analog Value device just has to be inserted into the device tree of the CODESYS application.

CODESYS BACnet SL supports BACnet IP functionality via Ethernet interfaces, providing extensive configuration and implementation capabilities for BACnet objects. The principles and operating methods of CODESYS BACnet SL are aligned with the recommendations of AMEV-AS-B.


Programming System

CODESYS Development System V3.5.15.0 or higher

Runtime System

CODESYS Control V3.5.15.0 or higher

Supported Platforms/ Devices

  • CODESYS Control Win (not RTE)

  • CODESYS Control for Raspberry Pi

Note: Other platforms are supported provided that the device manufacturer also supports CODESYS BACnet.

Additional Requirements





License activation optional on CODESYS Key or Soft Key (Soft Key: free of charge component of CODESYS Controls)

Required Accessories


Version history

Version Release Notes
Release date

Quality update with minor improvements and bug fixes.

14.08.2020 - 29.05.2020

CODESYS BACnet contains enhancements which are mainly focused upon flexibility and efficiency improvements for BACnet application development. Most prominently: - BACnet object properties can be configured regarding existence, writability and persistence - a default implementation for BACnet Trend Log - examples included in CODESYS BACnet package - source code of BACnet default implementations included in CODESYS BACnet package In general lots of improvements have been added to make it easy to build your specific BACnet B-BC and make it pass the according BACnet conformance tests.


major improvements:

  • added BACnet object types Integer Value, Large Analog Value, Positive Integer Value
  • BACnet “configuration devices” to add in device tree underneat ETH (for BACnet IP)
  • extended BACnet server objects with configuration information regarding existence, writability and persistence of properties
  • default implementation for BACnet object persistence
  • default implementation for BACnet backup/restore
  • default implementation for BACnet TimeSync and UTCTimeSync
  • default implementation to limit BACnet client creatable object types


Object types Global Group, Group, Life Safety Point and Life Safety Zone has been added. The libary BACnetDefaultImpl has been added.


CODESYS BACnet implements BACnet protocol revision 14

26.07.2018 CODESYS BACnet ensures 64 bit compatibility. 02.11.2017

1 Review(s)

Lange erwartet... Review by strichachtlos
Sehr gut umgesetzt. Danke an die Entwickler! (Posted on 03/12/2016)

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