0x709 ADSERR_DEVICE_INVALIDCONTEXT Invalid Operating Context

The ADS call was made from an invalid operating-system context.

Source checked4/4 values · 2026-10-26

Specification

1 source

Code	0x709
Meaning	The operating-system context is invalid, often when ADS blocks are used in different tasks.
Remedy	Synchronize multitasking in the PLC.