Troubleshooting steps
Check module connections verify wiring replace module check address configuration
Siemens PLC
86A0 – I/O error
Error detected on I/O module
Details
An I/O module has detected an error or communication failure.
Error typeerror
MeaningI/O module error
Typical causesModule disconnected wiring fault module defective incorrect addressing
SolutionsCheck module connections verify wiring replace module check address configuration
Severitymedium
Catalog references
Vendor Information
Siemens86A0
Utilities
Troubleshooting Steps
Related
Related Siemens PLC Codes
FAQ
Common questions
Can I continue operation?
Some I/O may not function. Check which module has the error.