Control device and communication device

A control device that constitutes a control system for controlling machines or facilities, the control device comprising:

• a first communication circuit configured to transmit and receive data in accordance with a first protocol, the first communication circuit including a first timer that defines a time of data transmission and is time-synchronized with an entity to and from which data is transmitted and received;
• a second communication circuit configured to transmit and receive data in accordance with a second protocol different from the first protocol, the second communication circuit including a second timer that defines a time of data transmission and is time-synchronized with an entity to and from which data is transmitted and received;
• and
• a processor configured to time-synchronize the first timer and the second timer, wherein the processor time-corrects the second timer with respect to the first timer, and the processor time-synchronizes each entity time-synchronized with the second communication circuit with the second timer which has been time-corrected.