I just had a look around the Eclipse documentation and the unit itself and unfortunately cannot give you a definitive answer for this. There is an algorithm “MIDI Harmony” on both the H8000 and H9000, but it is not clear if this exists on the Eclipse. Looking through the preset and algorithm documentation it is not mentioned there, so I am not sure why it is mentioned in the user guide.
However, you can set an external controller to use “Note On” which for the Eclipse is actually MIDI Note Number (see p46 of the Eclipse user manual). You should be able to configure that external controller to your pitch shift parameter, and then your MIDI notes will change the parameter accordingly.