Siemens SIMATIC S7-1500 Manual page 25

Structural distribution and mode of operation
The TM NPU is subdivided functionally into "application" and "firmware":
• The application consists of the neural network (or networks) and the user program – the
so-called MicroPython script.
The user program is not supplied with the TM NPU, but instead must be loaded from the
SIMATIC Memory Card.
The user program is referred to in this documentation as the MicroPython script. You
define the user-specific workflow in the MicroPython script.
• The integrated MicroPython interpreter enables access to the module functions via the
MicroPython script.
• The firmware is the executing part of the TM NPU. It monitors and controls the
subordinate module functions, e.g.
– Backplane bus communication
– Ethernet and other services, e.g. USB
– Execution of the neural networks
More information
You can find more information on the functionality and the creation and use of the user
program in section MicroPython functionality (Page 31).
You can find more information on the flow and mode of operation in section Flow and
procedures (Page 33).
Technology Module TM NPU
Equipment Manual, 07/2023, A5E46384784-AC
Wiring
4.3 Block diagram (logical)
25