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You have made a statement of intent, with the implication that you would like general advice about the interface.
Please add any information you have or detailed questions, including but not limited to:
The protocol you intend to use. The Wago 750-650 is a very general purpose serial interface.
The direction of the data transfer; are you trying initiate communications from the MicroLogix side, or from a Wago controller on the Henkel equipment side ?
What wiring you have already tried.
Information about the PLC-side program code.
Troubleshooting or diagnostic information.
Henkel has a full service engineering department. Are you working with them directly on this application ?