Hardware interrupts (e.g., from an ET200M input module) go to the CPU’s interrupt controller. S7-DOS:
Using → Module Information → “Operating mode” tab: simatic s7dos
If the service stops (e.g., s7oiehsx ), many Simatic Manager functions will fail, requiring a restart of the service or software. Hardware interrupts (e
For S7DOS to work via the "SIMATIC S7 Protocol Suite" in a standard way, the PC itself must often be configured as a "PC Station" in the hardware configuration of Step 7. Hardware interrupts (e.g.
If OB1 overruns the configured max cycle time, S7-DOS triggers OB80 (time error) and may stop the CPU.
This determinism allows time constants down to 200 µs on fast S7-400 CPUs.