The CM 1243-5 provides access to different communication services on the basis of PROFIBUS:

• PROFIBUS DP (according to IEC 61158, master)
• PG/OP communication
• S7 communication

PROFIBUS DP master

The CM 1243-5 works as a DP-V1 master in accordance with IEC 61158, handles data traffic completely autonomously, and thus relieves the CPU of communication tasks.

The data areas of the distributed I/Os are transferred consistently between CP and CPU. As a DP master, it allows the connection of up to 16 PROFIBUS-compliant DP slaves

PG/OP communication

The S7-1200 to which the CM 1243-5 is connected can be programmed with the help of PG/OP communication.

S7 communication

Communication with the following other systems can be implemented with the mechanisms familiar from the S7 world (Put/Get) on the basis of S7 communication:

• To other SIMATIC S7 programmable controllers
• To HMI devices
• To PCs, laptops, field PGs with PROFIBUS cards

Diagnosis

Extensive diagnostic options are available via STEP 7, including

• Operating state of the CM
• General diagnostics and statistics functions
• Connection diagnostics
• Message buffer

STEP 7 Basic V11 or higher is required for configuring the full functional scope of the CP 1243-5.