Control method and apparatus

A first controller, comprising:

• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform operations comprising:
• before at least one of a control function of the first controller or a control function of a second controller is activated, obtaining a first operating status of the first controller, wherein the first operating status comprises a faulty state or a non-faulty state;
• receiving first indication information sent by the second controller, wherein the first indication information indicates that a status of the second controller is one of a primary-controller state, a secondary-controller state, or a controller pending state;
• setting a first controller mode of the first controller based on the first operating status and the first indication information, wherein the first controller mode of the first controller comprises a mode in which the first controller is a primary controller or a mode in which the first controller is a secondary controller;
• and
• sending second indication information to the second controller, wherein the second indication information indicates the first controller mode of the first controller, wherein a first controller mode of the second controller that is set by the second controller does not conflict with the first controller mode of the first controller, and the first controller mode of the second controller comprises a mode in which the second controller is the primary controller or a mode in which the second controller is the secondary controller.

A second controller, comprising:

• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform operations comprising:
• before at least one of a control function of a first controller or a control function of the second controller is activated, sending first indication information to the first controller, wherein the first indication information indicates that a status of the second controller is one of a primary-controller state, a secondary-controller state, or a controller pending state;
• receiving second indication information sent by the first controller, wherein the second indication information indicates a first controller mode of the first controller, wherein the first controller mode of the first controller is determined based on a first operating status of the first controller and the first indication information;
• and
• setting a first controller mode of the second controller based on the second indication information, wherein the first controller mode of the second controller does not conflict with the first controller mode of the first controller, and wherein the first controller mode of the second controller comprises a mode in which the second controller is a primary controller or a mode in which the second controller is a secondary controller.