Communication control device and control communication system

A control communication system comprising:

• a first communication control device;
• and
• a second communication control device controlled by the first communication control device, wherein
• each of the first communication control device and the second communication control device includes
• a calculation unit that processes control data,
• a communication unit that transmits a packet including the control data, and
• a data storage unit that has an exclusion control function,
• the communication unit
• associates a position occupied by each of two or more pieces of partial data constituting the control data in the control data with an attribute related to the packet communicated by the communication unit, and
• transmits and receives the partial data to and from the communication unit via the data storage unit, and
• the first communication control device determines, based on a control cycle in the second communication control device, a necessary data capacity per control cycle, and a capacity of the data storage unit, a communication schedule including a datagram configuration constituting the packet, a communication timing of the packet, an access destination address of the data storage unit of the second communication control device designated in the packet, and an assignment of the data storage unit of the second communication control device to a virtual area.