No write access to the parameter (Register 0007)
Danfoss · VLT Micro Drive FC 51
¿Qué significa 01 ?
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.
Causas comunes
- 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.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Verify in the drive's communication manual that the target parameter is actually writeable via Modbus Holding Register 0007.
- 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
Ensure the drive is in a stopped state (motor not running, output frequency 0 Hz) before attempting to write to critical parameters.
- 4
Check for any active drive functions (e.g., autotuning via Parameter 8-00) that might temporarily restrict write access.
- 5
If the parameter is password-protected, use the LCP to enter the correct password before the Modbus master attempts to write.