Siemens S7-400 installation manual Inserting a Memory Card in a CPU

Commissioning

Inserting a Memory Card

To insert a memory card, follow the steps outlined below:

1.Set the mode selector switch on the CPU to STOP.

2.Insert the memory card in the submodule slot of the CPU and push the memory card in as far as it will go.

Note the position of the marker dot. You can only insert the memory card in the card slot in the direction shown in Figure 6-3.

Result: The CPU requests a memory reset by slow flashing of the STOP LED at 0.5 Hz.

3.Perform a memory reset on the CPU by pressing the mode selector switch in MRES position and then resetting it to STOP.

Result: The STOP LED flashes for at least 3 seconds at 2 Hz (reset is being executed) and then remains lit.

Marker dot

Figure 6-3 Inserting a Memory Card in a CPU

Note

If you insert or remove the memory card with the controller switched on, the CPU inidcates a memory reset request by the slow flashing of the STOP indicator at 0.5 Hz.

If you insert or remove the memory card with the controller switched off, the CPU performs an automatic memory reset after power on.

6-12	Automation System S7-400	Hardware and Installation
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