Siemens S7-400 installation manual Replacing CPUs, Saving the Data, Removing the Module

Maintenance

7.3Replacing CPUs

Slot Numbering

If you have provided the modules in your system with slot numbering, you must remove the number from the old module when replacing it and apply the number to the new module.

Saving the Data

Save the user program including configuration data.

Removing the Module

1.Set the CPU mode switch to STOP.

2.Set the standby switch of the power supply module to

3.Remove the cover of the CPU.

4.Disconnect the MPI connector, if applicable.

(0 V output voltages).

5.Disconnect the connector at the EXT. BATT. socket, if applicable.

6.Remove the memory card.

7.Loosen the mounting screws of the module.

8.Swing the module out.

Automation System S7-400	Hardware and Installation	7-5
A5E00850741-01