No write access to the parameter (Register 0007)

What does 01 mean?

An attempt was made to write to a parameter through Holding Register 0007 that is either inherently read-only or currently write-protected. This indicates a parameter that can only be viewed, or one that requires a specific operating state or access level for modification.

• Attempting to write to a parameter that is inherently read-only (e.g., drive serial number, fault log entries) through Modbus Holding Register 0007.
• Parameter access level (e.g., Parameter 16-00, 'Access code') is set too low on the drive to allow write operations via communication.
• The drive is currently running the motor, and the specific parameter (e.g., motor configuration via Parameter 1-20) cannot be modified during operation.
• A temporary lockout or protection mechanism is active (e.g., during an autotune process via Parameter 8-00, or a safety function engaged).
• The parameter requires a password to be entered via the LCP or a specific write sequence that isn't being followed by the Modbus master.

Click steps to track your progress.

1. 1

   Verify in the drive's communication manual that the target parameter is actually writeable via Modbus Holding Register 0007.

2. 2

   Set the drive's access level (e.g., Parameter 16-00) to a higher value (e.g., '3 - Advanced' or '4 - Expert') using the LCP.

3. 3

   Ensure the drive is in a stopped state (motor not running, output frequency 0 Hz) before attempting to write to critical parameters.

4. 4

   Check for any active drive functions (e.g., autotuning via Parameter 8-00) that might temporarily restrict write access.

5. 5

   If the parameter is password-protected, use the LCP to enter the correct password before the Modbus master attempts to write.