InstanceVisible ACE Reference Guide, 18317-000 Rev A Page 337 sequence id _ Index of the vision sequence. The first sequence is 1. tool id _ Index of the tool in the vision sequence. The first tool is 1. instance id _ Index of the instance for which you want the result. ID 1373: the value used to reference this property. index id _ Index of the robot. frame id _ Index of the frame that contains the specified instance.