Troubleshooting steps
Check wiring for shorts verify input voltage levels check for loose connections
Siemens PLC
86A2 – I/O error
Digital input error
Details
Digital input module has detected a fault or inconsistent signal.
Error typeerror
MeaningDigital input error
Typical causesWiring fault short circuit input voltage incorrect
SolutionsCheck wiring for shorts verify input voltage levels check for loose connections
Severitymedium
Catalog references
Vendor Information
Siemens86A2
Utilities
Troubleshooting Steps
Related
Related Siemens PLC Codes
FAQ
Common questions
Why do inputs read incorrectly?
Common causes: wiring faults voltage drops or electromagnetic interference.