{"id":"ads-0x709","model_id":"0x709","name":"0x709 ADSERR_DEVICE_INVALIDCONTEXT Invalid Operating Context","summary":"The ADS call was made from an invalid operating-system context.","study_notes":[],"safety_notes":[],"sources":[{"url":"https://infosys.beckhoff.com/content/1033/tcadscommon/374277003.html","title":"ADS Return Codes","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":4,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"alarm","spec":{"code":"0x709","controllers":["beckhoff-twincat-3"],"meaning":"The operating-system context is invalid, often when ADS blocks are used in different tasks.","remedy":"Synchronize multitasking in the PLC."},"url":"https://machineschema.com/alarm/ads-0x709","license":"https://creativecommons.org/licenses/by/4.0/"}