Siemens SIMATIC S7-1500 System Manual page 199

Commissioning
11.4 Operating states of the CPU
Response when preset configuration does not match actual configuration
The configuration downloaded to the CPU represents the preset configuration. The actual
configuration is the actual configuration of the automation system. If the preset configuration
and actual configuration differ, the hardware compatibility setting defines the behavior of the
CPU. For additional information on hardware compatibility, see the section Operating mode
transitions (Page 201).
Cancellation of startup
If errors occur during startup, the CPU cancels startup and returns to STOP.
The CPU does not perform startup or interrupts startup under the following conditions:
● You have not inserted a SIMATIC Memory Card or have inserted an invalid one.
● You have not downloaded a hardware configuration to the CPU.
Configuring startup behavior
You configure the behavior of the CPU in the Startup group in the CPU properties.
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SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA