Illegal Operation

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An operation was attempted on a parameter that is invalid for its type or current state, such as trying to assign a string value to a numeric parameter, or an incorrect parameter type is being used. This prevents data corruption or unexpected behavior within the drive.

• A PLC program is attempting to assign a value with an incompatible data type to a parameter (e.g., writing a string 'ABC' to numeric parameter P2-01).
• An incorrect parameter type or index is being used in the read/write command (e.g., attempting to write to a boolean flag as if it were an analog input parameter P7-01).
• A write operation is attempted on a diagnostic or status parameter (e.g., Motor Current P2-05) that is read-only and updated by the drive's internal processes.
• The parameter's data format expects a specific unit or encoding (e.g., Hz for P2-01) but receives a raw integer value without scaling or conversion.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   1. Review the PLC code responsible for writing to the parameter and verify that the data type of the value being written matches the parameter's expected type (e.g., REAL for P2-01).

2. 2

   2. Consult the drive's parameter manual to confirm the exact data type, range, and read/write status for the specific parameter in question (e.g., is P2-05 read-only?).

3. 3

   3. Ensure any scaling or unit conversions are correctly applied in the PLC before writing the value to the parameter (e.g., convert RPM to Hz for P2-01).

4. 4

   4. If using an HMI, verify that the HMI's tag definition for the parameter matches the drive's data type and access rights.