Troubleshooting steps
Check CPU diagnostic LEDs review diagnostic buffer verify firmware
Siemens PLC
7040 – CPU error
CPU system error
Details
CPU error 7040. Check CPU status and diagnostics.
Error typeerror
MeaningCPU error
Typical causesCPU hardware fault firmware error system fault
SolutionsCheck CPU diagnostic LEDs review diagnostic buffer verify firmware
Severitycritical
Catalog references
Vendor Information
Siemens7040
Utilities
Troubleshooting Steps
Related
Related Siemens PLC Codes
FAQ
Common questions
Is CPU damaged?
Check CPU diagnostic information and contact support
Community
Discussion & Experiences
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