At 3:47 PM, a bearing seized on the acid bath agitator. The temperature spiked to 110°C. Acid_Temp > 95C triggered a pre-programmed fault.
Transition from Step 20: Condition: (T#45s) AND NOT EStop_Pressed Supervisory Logic (Parallel Branch): IF EStop_Pressed THEN Jump to Step 99: EMERGENCY_RETRACT END_IF codesys sfc example
Lena pointed at the HMI. "No. The SFC saved it. Look—step history." At 3:47 PM, a bearing seized on the acid bath agitator
She slammed her fist on the desk.
"Fix it with a state machine," her manager said. At 3:47 PM