IM.CP,DP

[new_man 0]

hiiii i am new at plc siemens i want to know What is the main different between IM,CP,DP

[JesperMP 2]

Hi newman IM is for Interface Module. It is used to expand a main S7 PLC rack with extension racks. CP is for Communication Processor. It expands an S7 rack with a communication port like ethernet, profibus, RS232, RS422. DP is short for Profibus Distributed Periphery. Some ports, onboard or via a CP are called DP ports when they support Profibus DP.

[new_man 0]

thanks for your reply my question is for communication , how to select the proper type ?

[JesperMP 2]

It is impossible to answer without knowing your application.