A portable electronic device has a connector 42 for being connected to a master having a program executing function, microcomputer 41, which has a program memory 41a for storing a program, for controlling execution of the program, and a storage for storing event occurrence, wherein an event that has been stored in the storage is transferred to the master in response to a request from the master. The weaving machine is equipped with an electromotive main drive and the shedding machine is equipped with an electromotive auxiliary drive. Quietness of below 70 db can be delivered. The service provided to a group of customers, that group of customers being defined by at least a portion of the unique bit string, may be monitored.