Installation of a CPU 41x-H
4-20
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Changing Memory Cards
To change the memory card, follow the steps outlined below:
1. Set the CPU to STOP.
Note
If the memory card is not removed in the STOP mode, the CPU goes to the STOP
state and the STOP indicator flashes every 3 seconds to prompt you to carry out a
memory reset. This procedure cannot be influenced by error OBs.
2. Remove the plugged in memory card.
3. Insert a “new” memory card.
4. Perform a memory reset on the CPU.
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