Siemens alarm 3000: Emergency stop
SINUMERIK 828D alarm · Siemens 828D
What it means
Emergency stop was applied through the NCK/PLC interface DB2600 DBX0.1. The 828D switches to NC-not-ready, disables start and cancels the alarm-reaction delay; restart requires removing the cause and acknowledgment via DB2600 DBX0.2 by the PLC.
Likely causes
- E-stop mushroom or pull-cord operated
- Door interlock / safety relay chain open
- Wiring fault in the hardwired e-stop circuit
- OEM PLC logic issuing e-stop
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