Point-to-point connection CP 440 Installation and Parameter Assignment 
Manual, 09/2007, A5E00057742-03 
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Product Description 
1
1.1 Uses of the CP 440 
Applications 
The CP 440 communication processor enables you to exchange data between automation 
devices or computers by means of a point-to-point connection. The CP 440 is designed to 
transfer short, fast frames. 
The following are typically connected to it: 
●  Scanners, barcode readers 
●  Sensors 
●  Weighing scales 
Functionality of the CP 440 
The CP 440 communication processor provides the following functionality: 
●  An integrated MPI (Multipoint) X27 (RS422/485) interface 
●  A maximum transmission length of 400 bytes (Page 86) 
●  A transmission rate of up to 115.2 kbps, full-duplex 
●  Integration of the most important transmission protocols in the module firmware 
–  ASCII driver 
–  3964(R) Procedure 
●  Customization of the transmission protocols by means of parameter assignment with the 
CP 440: Point-to-Point Communication, Parameter Assignment interface 
Uses of the CP 440 
The CP 440 communication processor allows point-to-point communication with 
SIMATIC modules and with non-Siemens products.  
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