Siemens SIMATIC S7-1500 System Manual page 200

Setting startup behavior
Proceed as follows to set the startup behavior:
1. Select the CPU in the device view of the STEP 7 hardware network editor.
2. Select the "Startup" area in the properties under "General".
Figure 11-1
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SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA
Setting startup behavior
Sets the startup type after POWER ON
Defines the startup behavior for the event that a (distributed I/O) module in a slot does
not correspond to the configured module. This parameter applies to the CPU and to all
the modules for which no other setting has been selected.
• Startup CPU only if compatible: With this setting, a module in a configured slot must
be compatible with the configured module. Compatible means that the module has
the relevant number of inputs and outputs and the electrical and functional properties
correspond.
• Startup CPU even if mismatch: With this setting, the CPU starts up irrespective of the
type of module plugged.
Specifies a maximum period (default: 60 000 ms) in which the distributed I/O must be
ready for operation.
If the distributed I/O is ready for operation within the configuration time, the CPU switch-
es to RUN.
If the distributed I/O is not ready for operation within the configuration time, the startup
behavior of the CPU depends on the hardware compatibility setting.
Commissioning
11.4 Operating states of the CPU
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