PairPositionX ACE Reference Guide, 18317-000 Rev A Page 426 $ip IP address of the vision server. Applies to V+ syntax only. Uses standard IP address format, for example: 192.168.1.120. 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 pair for which you want the result. ID 1921: the value used to reference this property. index id _ N/A frame id _ N/A