Support
Search FAQs
FA197340
How can we help you today?

Why do I get the error code OL9-21581 Illegal Modbus function code when trying to connect to the Concept simulator?


One possible reason is the package of Concept installed is Concept S or Concept Small. The small version of Concept does not contain the IEC 32 simulator.

Released for: Schneider Electric Belgium
Explore more
Range:
Modicon Premium
Users group

Discuss this topic with experts

Visit our community and get advice from experts and peers on this topic and more
Explore more
Range:
Modicon Premium

Need help?

Need help?

Get a Quote

Get a Quote

Start your sales inquiry online and an expert will connect with you.

Where to buy?

Where to buy?

Easily find the nearest Schneider Electric distributor in your location.

Help Center

Help Center

Find support resources for all your needs, in one place.

  • Products Documentation
  • Software Downloads
  • Product Substitution and Replacement
  • Help and Contact Center
  • Find our Offices
  • Get a Quote
  • Where to buy
  • Schneider Electric Community
  • Careers
  • Company Profile
  • Report a misconduct
  • Accessibility
  • Investors
  • EcoStruxure
  • Job Search
  • Blog
  • Privacy Policy
  • Cookie Notice
  • Terms of use
  • Change your cookie settings