The Omron R88D-GT15H is an analogue/pulse-type servo drive.
The analogue/pulse interface tells you this drive accepts step/direction or ±10 V analogue command signals — common for older CNC, indexing, or point-to-point positioning systems. It does not natively speak a fieldbus (EtherCAT, PROFINET, etc.), so if your motion controller outputs a pulse train or analogue speed reference, this drive is a direct match. If your system uses a digital motion bus, you need a different drive.