Unit control oriented communication device.

摘要

The present invention relates to a unit control oriented communication device for conducting communications between a main control portion for controlling a system and a group of a plurality of units scattered inside and outside of the system, each unit being the physical or functional unit. More particularly, the present invention pertains to a radio communication device which utilizes light. The present invention provides the communication checking algorithm for preventing communication errors or erroneous transmission which occurs inside and outside of the system, control of suspension of communication, and self-diagnosis function. The present invention also provides the configuration which is free from malfunction caused by an communication data latch error, and the configuration which achieves parallel- and series-connection of the group of units. Consequently, malfunction of the system generated by the erroneous transmission due to noises or disturbance can be greatly reduced. <IMAGE> <IMAGE>