format_version: "0.1"
id: fbd_comb_and
name: "comb and (Function Block Diagram rendering)"
domain: manufacturing
language: FBD
source:
  origin: authored
  reference: "Function Block Diagram rendering of the three-contact series rung, for cross-language comparison in lesson 1.1"
  license: CC-BY-4.0
properties_file: props.yaml
safety_intent: "The output must be energised only when all three series contacts are closed."
validation_status: candidate
syntax_pair_of: ld_comb_and
variants:
  - file: program.xml
    expected_verdict: true
    ground_truth:
      method: expert
metrics:
  pous: 1
  variables: 4
features: [blocks, fan_in]
difficulty: easy
tags: [feature, semantics, syntax-pair, language-coverage]