The CP 1542-5 is the communications processor of the SIMATIC S7-1500 for the PROFIBUS bus system. It relieves the CPU from communications tasks.

Communications options of the S7-1500 using communication modules:

• As master for PROFIBUS DP according to IEC 61158/EN 50170 (max. 32 DP slaves)
• Communication with programming devices and HMI devices

The number of CPs that can be operated depends on the CPU type and on the communication services used.