b'CPU : Item not available' Error

[KAYAUgurBerat]

Hello everyone, I want to change the values of the data blocks in the plc with the snap7 library. When I try this, I get the error shown below.

b'CPU : Item not available' Traceback (most recent call last): File "D:/Belgeler D/pythonProject/plcdeneme.py", line 10, in plc_info = plc.get_cpu_info() File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\snap7\client.py", line 161, in get_cpu_info check_error(result, context="client") File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\site-packages\snap7\common.py", line 92, in check_error raise Snap7Exception(error) snap7.exceptions.Snap7Exception: b'CPU : Item not available'

Process finished with exit code 1

And this is my code:

import snap7
IP = "192.168.0.1"
RACK = 0
SLOT = 1

plc = snap7.client.Client()
plc.connect(IP,RACK,SLOT)

plc_info = plc.get_cpu_info()
print(f"adı: {plc_info.ModuleTypeName}")

state = plc.get_cpu_state()
print(f"State: {state}")

I made all the plc settings on Snap7's own site. What should I do to fix this problem? Thank you from n ow