Today I Learned: This Delta AS-series uses EtherNet/IP, and exposes its memory ranges in either bit or 16-bit word format in various custom CIP classes (See the user manual §9.8). It also has full support for scanning EtherNet/IP I/O, being an adapter for another device as scanner, and claims support for producer/consumer tags.
The only driver for Ignition that currently supports the required features is mine:
Select the Adapter option to use the Delta as a scanner. Select the Scanner+Adapter options to use the Delta as an adapter. Select the Client Option to poll class/instance/attribute values. (That last will require an XML supplement configuration.)