#$%^&*AU2019232889A120191010.pdf#####C:Interwo nNRPortblDCCDXL19330145_l.docx-19/09/2019 ABSTRACT A method comprising: obtaining a planning model for an industrial facility at a master model predictive 5 control (MPC) controller; sending at least one optimization call from the master MPC controller to one or more slave MPC controllers; receiving at least one proxy limit value from the one or more slave MPC controllers at the master MPC controller in response to the at least one optimization call, wherein the at least 10 one proxy limit value identifies to what extent one or more process variables controlled by the one or more slave MPC controllers are adjustable without violating any process variable constraints; and performing plantwide optimization at the master MPC controller using the planning model and the at least one proxy limit value, wherein the at least one proxy limit value allows 15 the master MPC controller to honor the process variable constraints of the one or more slave MPC controllers during the plantwide optimization.1/16 ENTERPRISE OPERATOR 100 CONTROLLER STATION 138 142 144 148 150 140 HISTORIAN 141 146 152 136 134 130 132 PLANT 000 L PLANTS 1 I1 I ROUTER/ PLANT OPERATOR I 101b 101n I FIREWALL CONTROLLER STATION I I I' I 126 122 124 S128 I ROUTER/ UNIT OPERATOR I I FIREWALL CONTROLLER STATION I I I 1118 114 120 116 1 101 a I ROUTER/ MACHINE OPERATOR I I FIREWALL CONTROLLER STATION I I 1 112 SWITCH/ FIREWALL 110 I I 104 108 CONTROLLER 106 I I SENSOR 102a 102b ACTUATOR I L- ---------------------i FIG.1I
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