Automation System S7-400 Hardware and Installation

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 memorycard in as far as it will go.

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

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

3. Perform a memory reset on the CPU by pressing the mode selector switch inMRES 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.