Siemens PLC

6502 – Communication error

PROFIBUS-DP communication error

Details

Communication fault detected on PROFIBUS-DP network.

Error typeerror
MeaningPROFIBUS-DP error
Typical causesCable disconnected terminating resistors missing incorrect baud rate
SolutionsCheck cable connections verify terminating resistors check baud rate settings test network
Severityhigh

Catalog references

Vendor Information

Siemens6502

Utilities

Troubleshooting Steps

Troubleshooting steps

Check cable connections verify terminating resistors check baud rate settings test network

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

Why do I need terminating resistors?

Terminating resistors prevent signal reflection at network endpoints which causes communication errors.