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Hi @ltwcare |
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I am using version 1.3 of python-snap7 to read data from an S7-300 PLC. Reading out the data works perfectly, both on inputs, flags and data blocks. However, as soon as I execute the function 'get_cpu_info()', the PLC crashes and all LEDs starts to flash. To bring the PLC 'back to life', it must be completely powered down.
Python version: 3.10.6
Python Snap7: v1.3
Reproducible on the following PLCs
Message buffer PLC after restart
Number | Time | Date | Event
1 | 12:46:10:971 pm | 20.09.2023 | Mode transition from STARTUP to RUN
2 | 12:46:10:967 pm | 20.09.2023 | Request for manual warm restart
3 | 12:46:10:763 pm | 20.09.2023 | Mode transition from STOP to STARTUP
4 | 12:45:58:008 pm | 20.09.2023 | Memory reset executed
5 | 12:45:50:993 pm | 20.09.2023 | STOP caused by CPU memory management
6 | 12:45:50:993 pm | 20.09.2023 | Power on backed up
7 | 12:45:50:993 pm | 20.09.2023 | Illegal module: replace module and reset memory
8 | 12:42:29:983 pm | 20.09.2023 | DEFECTIVE: internal system error
9 | 11:45:21:496 am | 20.09.2023 | Mode transition from STARTUP to RUN
10 | 11:45:21:492 am | 20.09.2023 | Request for manual warm restart
code snippet
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