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What are the various possible cause of Cold start for M340 PLCs.

Following are the different possible causes of a cold start:
  • Loading of an application
  • Restore application from memory card, when the application is different from the one in internal RAM
  • Restore application from memory card, with Unity Pro commands PLC → Project backup → ....
  • RESET button pressed on supply
  • RESET button pressed on supply less than 500ms after a power down
  • RESET button pressed on supply after a processor error, except in the case of a watchdog error
  • Initialization from Unity Pro by Forcing the system bit %S0
  • Restoral after power supply outage with loss of context 
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