# EtherNet/IP Output Assembly - Instance 21

Instance 21 is supported using the In-Sight 3D adapter with 3D-L4000 series vision system.

Instance | Byte | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
21 | 0 | Reserved | Clear Error | Reserved | Execute Command | Reserved | Buffer Results Enable | Trigger Enable
1 | Reserved
2..3 | Command ID
4..7 | External Event 0-31
8..15 | Reserved
16 | Reserved | Set User Data 0 | Clear Exposure Complete 0 | Inspection Results Acknowledge 0 | Trigger Camera 0
17 | Reserved | Set User Data 1 | Clear Exposure Complete 1 | Inspection Results Acknowledge 1 | Trigger Camera 1
18 | Reserved | Set User Data 2 | Clear Exposure Complete 2 | Inspection Results Acknowledge 2 | Trigger Camera 2
19 | Reserved | Set User Data 3 | Clear Exposure Complete 3 | Inspection Results Acknowledge 3 | Trigger Camera 3
20..499 | User Data 0...479