CE04 Modbus: Slave Device Fail fault in delta drive

CE04 Modbus: Slave Device Fail fault in delta drive troubleshooting

Description

CE04 is a "Catch-all" failure response from the drive. It indicates the drive tried to execute the command but failed due to an internal state, often related to hardware or password locking.

Causes

1. Password Locked: The drive is password protected (System Lock), and you tried to write a parameter via RS-485 without unlocking it first.
2. CRC Error: (Rarely) internal Checksum calculation failed during processing.
3. Busy: The drive is busy performing an Auto-tune or Reset and cannot accept commands.

Solution

Check drive state:
1. Unlock: Send the password to the password address before writing other parameters.
2. Wait: Ensure the drive isn't in a specialized mode (Auto-tune) before communicating.
3. Check Wiring: Verify the termination resistors are correct to prevent corrupted packets.