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jennifergoldenAug 13, 2025
What to do if ABB Zenith 50P-2035 returns Illegal Data Address exception response to a write query?
- NNathan JonesAug 13, 2025
If you receive an Illegal Data Address exception response to a write query, ensure that the Holding Register or Coil address is within the valid range and that you are not attempting to write to a Read-Only register or coil. When using Write Multiple Holding Register or Coil commands, ensure the range does not include Read-Only registers; if it does, break the request into sections containing only Read/Write registers. If the issue persists, you may need to enable the feature associated with the register in the User Configuration Menu on the controller HMI. Also, avoid writing non-zero data to nonprogrammable date registers for CDP Exercisers. Finally, ensure you are using the correct command and range when writing CDP Exerciser or System Time registers.
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