Generate PLC Code (STEP7) of a Fuzzy System

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Daniel on 14 Jan 2026 at 8:12

Commented: Broy on 19 Jan 2026 at 5:52

Hello,

i was trying to generate a PLC Code (STEP7) from a fuzzy system i made with the Fuzzy Logic designer (3 Inputs, 1 Output).

I implemented it in Simulink in a Atomic Subsystem. Everytime i want to generate it, the following alarm comes.

"Code generation subsystem 'untitled/Fuzzy_PFO2' must not be specified in PLC Code Generation > Interface > Externally Defined Blocks."

I don't find the parameter "Externally Defined Blocks" under the Settings "Interface" in the "PLC Code Generation".

I made the Fuzzy System Block inside an Atomic Subsystem. I Attached pictures of everything.

Can someone help me?

Thanks and Best Regards Daniel

Broy on 19 Jan 2026 at 5:52

@Daniel, have you checked PLC Code Generation > Identifiers > Externally Defined Identifiers?

R2025b

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