Siemens simatic c7-621 Hardware Installation Manual page 102

Maintenance
Replacing the C7 The C7 is not designed for field repair. A defective C7 must therefore be
replaced.
Requirements
To replace a C7, the following requirements must be met:
Hardware
Development tools
User software (stored outside the C7)
Removal
Follow the steps outlined below:
Installation As soon as you have a new C7 available, install it as follows:
1. Mechanical and electrical installation is as described in the manual.
2. Connect a programming device/PC to the MPI interface. Set the highest
3. Reset the C7 memory as described.
4. Transfer the previously saved user program from the programming
5. Download you configuration to the C7 using ProTool/Lite.
6. Start the user program.
8-2
Programming device/PC with MPI interface
Suitable connecting cable
STEP 7
ProTool or ProTool/Lite
User configuration
User control program (when data from the C7 CPU can no longer be read)
The C7 is removed in the reverse order from that in which it was
installed.
Connect a programming device/PC to the MPI interface.
Save the user program from the C7-CPU on a programming device/PC
using STEP 7.
If the C7-CPU is defective and the user program can no longer be read,
remove the C7 without attempting to back up the data.
The configuration loaded on the C7 cannot be read. This must be
available on a programming device or PC.
MPI address.
device/PC with the corresponding data to the C7-CPU (using STEP 7).
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01