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Whisk the ketchup with the brown sugar, chipotle peppers, Worcestershire sauce, cumin and garlic. Cook in the microwave, on high, for 2 minutes or until hot and bubbling. Sprinkle the salt and pepper over both sides of each pork chop. Brush some of the ketchup mixture over the pork chops, reserving some for later.
Turn the grill on. Select the Sausage program and press OK. Lightly grease the cooking plates with cooking spray. Once the purple indicator light has stopped flashing, place the pork chops on the grill and close the lid.
Cook until the indicator light has changed to orange. Transfer the pork chops to a plate and tent with foil. Rest for 5 minutes. Meanwhile, brush some of the remaining ketchup mixture over the pineapple rings.
Select the Manual mode program, select yellow color setting and press OK. Lightly grease the cooking plates with cooking spray. When the grill is done preheating, open it up and place the pineapple on the grill and close the lid.
Cook for 3 to 5 minutes or until well marked. Place the pineapple rings on the pork chops and brush with any remaining sauce. Sprinkle with coriander and serve with lime wedges on the side.