Multiplex control device

A multiplex control device comprising:

• three or more control modules configured to execute same operations for same input signals in parallel and to output output signals to control a same controlled target;
• and
• a majority decision module configured to output an output signal that matches a majority of the output signals outputted by the three or more control modules, to the controlled target as a control signal that controls the controlled target,
• each of the control modules comprising:
• an input module configured to obtain an input signal to convert the input signal into an input value;
• a first determination module configured to obtain input values from input modules of the respective control modules to determine whether a majority of input values among the obtained input values match;
• an operation executing module configured, when the first determination module determines that the majority of input values match, to execute an operation using the matched input value to generate an output value;
• a second determination module configured to obtain output values from operation executing modules of the respective control modules to determine whether a majority of output values among the obtained output values match;
• and
• an output module configured, when the second determination module determines that the majority of output values match, to convert the matched output value to generate an output signal, and to output the output signal to the majority decision module.