| 摘要 |
PURPOSE:To make it possible to grasp the state of abnormality of communica tion quickly and surely by making another side request resending of data when abnormality occurred in data transmission of a main control section and a module and reporting integrated value of number of times of request for resend ing at a proper time when the number of times of request for resending arrived at a specified value. CONSTITUTION:A communication section checks whether receiving data are sent in due form or not and returns a request for resending when there is an error in the form. A count processing section 63 counts the number of times C of request for resending, and clears if the number of times C is less than four continuously, and generates an abnormality signal HG when it comes up to four. The number of times C is added up throughout one day and integrat ed number of times SIGMAC is displayed in a CRT 29a through a main control sec tion 27. On detecting the abnormality signal NG, the main control section 27 stops all machines for safety, and integrated number of times SIGMAC is displayed being classified for each module.
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