First Power-On Of The Cpu - Siemens SIMATIC S7-1500 System Manual

Automation system
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Reactions after removing/inserting the SIMATIC memory c ard
Inserting and removing the SIMATIC memory card in STOP mode triggers a re-evaluation of
the SIMATIC memory card. The CPU hereby compares the content of the configuration on
the SIMATIC memory card with the backed-up retentive data. If the backed-up retentive data
matches the data of the configuration on the SIMATIC memory card, the retentive data is
retained. If the data differs, the CPU automatically performs a memory reset (which means
the retentive data is deleted) and then goes to STOP.
The CPU evaluates the SIMATIC memory card and indicates this by flashing the RUN/STOP
LED.
Reference
You can find additional information on the SIMATIC memory card in the section SIMATIC
memory card (Page 187).
10.3.2

First power-on of the CPU

Requirements
● An S7-1500 automation system is installed and wired.
● The SIMATIC memory card is inserted in the CPU.
Procedure
To commission a CPU, follow these steps:
1. Switch on the system power supply and load current supply.
Res ult:
● The CPU executes a flash test:
– All LEDs flash at 2 Hz
– RUN/STOP LED flashes alternately yellow/green
– ERROR LED flashes red
– MAINT LED flashes yellow
● The CPU runs the system initialization and evaluates the SIMATIC memory card:
– RUN/STOP LED flashes yellow at 2 Hz
● After the system initialization has been completed, the CPU goes to STOP mode:
– The RUN/STOP LED lights up yellow
Automation system
System Manual, 09/2016, A5E03461182-AD
10.3 Procedure for commissioning the S7-1500 automation system
Commissioning
167

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