Installation Order
S7-300, CPU 31xC and CPU 31x: Installation
2-2
Operating Instructions, Edition 08/2004, A5E00105492-05
Modifying the existing S7 system structure
To modify the configuration of an existing system, proceed as described earlier.
Note
When adding a new signal module, always refer to the relevant module information.
Reference
Also refer to the description of the various modules in the manual:
SIMATIC S7-300
Automation Systems, Module Data Reference Manual.