Siemens PLC

6505 – Communication error

Modbus communication error

Details

Communication fault detected on Modbus interface.

Error typeerror
MeaningModbus error
Typical causesIncorrect slave address baud rate mismatch parity error cable fault
SolutionsVerify slave address check baud rate settings verify parity settings check cable connections
Severitymedium

Catalog references

Vendor Information

Siemens6505

Utilities

Troubleshooting Steps

Troubleshooting steps

Verify slave address check baud rate settings verify parity settings check cable connections

Other codes

Other Siemens PLC Codes

80A0 – Memory error

Memory allocation error

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80A1 – Memory error

Memory error in retentive data area

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80A2 – Memory error

Memory error in work memory

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80A3 – Memory error

Memory error in load memory

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80A4 – Memory error

Memory card error

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FAQ

Common questions

Can I use Modbus and PROFIBUS together?

Yes if using different interfaces. Same interface cannot serve both protocols simultaneously.