Siemens Simatic S7-1500 Manuel - Page 20

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Configuration / address space

5.2 Address space and address assignment

5.2

Address space and address assignment

CPU and TM NPU exchange their data via the process image.

The TM NPU works with a process image of 256 bytes for inputs and 256 bytes for outputs.

Address space and address assignment

In the process image of the inputs and outputs, the first two bytes are always reserved for the

control and status information. All other addresses are used for communication and data

transfer with the running application (app).

The figures below show the address space assignment for the configuration with 256 bytes

for inputs and 256 bytes for outputs. You can freely assign the start addresses.

Address assignment in the process image input (PII)

Figure 5-1

Address assignment in the process image output (PIQ)

Figure 5-2

Address assignment in PII

Address assignment in PIQ

Technology Module TM NPU

Equipment Manual, 09/2020, A5E46384784-AA