Control system

A control system, comprising:

• an arithmetic device configured of an A system arithmetic unit including a first data dividing unit, a B system arithmetic unit including a second data dividing unit, and an A system communication control unit including a data combining unit and a collation unit,
• wherein the A system arithmetic unit and the B system arithmetic unit form a duplex system,
• the A system arithmetic unit and the B system arithmetic unit are separated by a gap such that wirings between the A and B system arithmetic units do not cross,
• a frame output from the A system arithmetic unit is transmitted to a B system communication control unit through the A system communication control unit and a first interface element, and
• a frame output from the B system arithmetic unit is transmitted to the A system communication control unit through the B system communication control unit and a second interface element, and
• wherein a signal which is transmitted to the A system communication control unit and the B system communication control unit from the A system arithmetic unit is transmitted by being divided,
• a signal which is transmitted to the A system communication control unit and the B system communication control unit from the B system arithmetic unit is transmitted by being divided,
• a response signal which is transmitted to the A system arithmetic unit from the A system communication control unit is collectively transmitted without being divided,
• a response signal which is transmitted to the B arithmetic unit from the B system communication control unit is collectively transmitted without being divided, and
• the response signals from the A system communication control unit and the B system communication control unit are not collated in the arithmetic device.