| 摘要 |
PROBLEM TO BE SOLVED: To solve that one host computer cannot judge when communication is executed from a device to itself when another computer changes a communication date as against the device without permission. SOLUTION: When the communication date is rewritten as against the device D by the host computer H1, the setting change flag 39 of the host computer H1 itself is turned on. Then, when communication is executed from the host computer H3 to the device D, the host computer H3 reports another host computer that correspondence to the change of the communication data by the host computer H1 is executed at the time of communication by turning on the own setting change flag 39. Thus, how the communication data of the device D is set is recognized. |
