| 摘要 |
PROBLEM TO BE SOLVED: To achieve a high degree of privacy, a high capability to eliminate interference waves, and a random access by multiple access system by using a small sized production information terminal board incorporating peripheral interfaces as many as possible in a small board. SOLUTION: A 32 bit RISC type MPU is adopted as CPU 13 which controls a central function of a small size production information terminal board. A bi-directional data communication is performed between the small size production information terminal board and a host computer through an antenna 3 by a spread spectrum communication for displaying production instruction and information on production progress to each worker, and moreover, each worker transmits various production information to the host computer by using key-switches. Further, since input terminal 10, output terminal 11, and serial interface connector 12 are built in the small size production information terminal board, it is possible to directly input a signal from an outside sensor and a switch, etc., or control an outside relay and a pilot lamp, etc., and also control peripheral equipments. |
