Siemens SIMATIC ET 200SP Manual - Page 14

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Product overview

2.2 Operating principle

2.2

Operating principle

The CPU contains the operating system and executes the user program. The user program

is located on the SIMATIC memory card and is processed in the work memory of the CPU.

The PROFINET interfaces on the CPU allow simultaneous communication with PROFINET

devices, PROFINET controllers, HMI devices, programming devices, other controllers and

other systems. The CPU 1512SP-1 PN supports operation as an IO controller, I-device or

With its optional PROFIBUS interface, CM DP, CPU 1512SP-1 PN supports the

configuration of PROFIBUS networks in addition to PROFINET IO. When you use the

interface as a PROFIBUS DP interface, you can configure the CPU 1512SP-1 PN as a DP

master or as an intelligent DP slave (I-slave).

CPU 1512SP-1 PN sends and receives data from the connected IO devices within a

PROFINET IO system. You can operate the CPU with a maximum of 128 connected IO

devices, a maximum of 64 of which use IRT (Isochronous Realtime).

The "I-device" (intelligent IO device) functionality allows you to exchange data with an

IO controller. CPU 1512SP-1 PN thus fulfills the role of an intelligent distributed pre-

processing unit for sub-processes. The I-device is connected as an IO device to a higher-

level IO controller for this purpose.

Advantages:

● Interference-resistant configuration due to short signal and encoder wiring

● Reduced wiring requirements for transmission of the data via PROFINET

Standalone CPU

You can also use the CPU 1512SP-1 PN in the ET 200SP distributed I/O system as a

"central system" without a higher-level controller.

DP master

To use the ET 200SP as a DP master, you need the CPU and the optional communication

module, CM DP. When used as a DP master, ET 200SP exchanges data with the connected

DP slaves via PROFIBUS DP.

Intelligent DP slave (I-slave)

To use the ET 200SP as an intelligent DP slave (I-slave), you need the CPU and the optional

communication module, CM DP. As an I-slave, the ET 200SP CPU is connected via

PROFIBUS DP to a higher-level DP master and exchanges data with it.

CPU 1512SP-1 PN (6ES7512-1DK01-0AB0)

Manual, 09/2016, A5E33591411-AC