format_version: "0.1"
id: st_guard_lock
name: "interlocked guard with rundown timer (ST twin)"
domain: manufacturing
language: ST
source:
  origin: authored
  reference: "Structured Text rendering of g_guard_lock, for cross-language comparison of the same safety function"
  license: CC-BY-4.0
properties_file: props.yaml
validation_status: candidate
syntax_pair_of: g_guard_lock
variants:
  - file: guard_lock.st
    expected_verdict: true
    ground_truth:
      method: expert
features: [ton]
difficulty: easy
tags: [safety-function, syntax-pair]