Maintenance
7-5
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
7.3 Replacing 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 (0 V output
voltages).
3. Remove the cover of the CPU.
4. Disconnect the MPI connector, if applicable.
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.
Installing a New Module
1. Attach the new module of the same type and swing it downwards.
2. Screw the module on.
3. If applicable, plug the connector for the external battery supply into the socket.
4. Set the CPU mode switch to STOP.
5. Insert the memory card.
6. Set the standby switch of the power supply module to I (output voltages at rated
value).
The remaining procedure depends on whether you use a Flash card and
whether or not you have configured your system for networking.
7. Proceed as follows to operate with a Flash card:
Transfer the user and configuration data.
Set the CPU mode switch to RUN.
Close the cover.
www.PLCworld.cn
To Next Page
Loading...
