Siemens SIMATIC CP 440 Manual page 159

Communication Matrix of the Protocols
The CP 440 communication processor can communicate with the following CPs
and CPUs of the SIMATIC S5 and SIMATIC S7 programmable controllers.
3964(R) Communication Matrix
The diagram below shows the communication matrix of the 3964(R) procedure.
Point-to-point connection CP 440 Installation and Parameter Assignment
A5E00057742-02
C
C-1