Siemens SIMATIC S5 CP 523 Manual page 114

Communications Mode
3. Establishing connections
The programmable controller must be switched off to carry out the following measures:
• Install the CP 523 in the central controller or expansion unit.
• Establish the connection between the CP 523 and the peripheral device.
• If you have stored the parameter setting data in a memory submodule, plug the memory
submodule into the CP 523.
You can then switch the PLC on.
4. CP 523 startup in Communications mode
After power recovery, the CP 523 is automatically in Transparent mode when:
• No memory submodule is plugged in.
• A memory submodule initialized for Transparent mode is plugged in.
• Transparent mode has been forwarded to the CP 523 from the user program.
You can set Interpretive or 3964(R) mode in the following ways:
• Transfer Interpretive or 3964(R) mode to the CP 523 in the user program
• Plug a memory submodule initialized for Interpretive or 3964(R) mode into the CP 523.
Note:
You can change modes during operation. To do so, you must issue the "Transfer parameter
setting data" request to the CP 523, but remember that you may have to reconfigure the serial
interface. The Send and Receive buffers are cleared.
7-8
CP 523
EWA 4NEB 811 6044-02a