| 摘要 |
PROBLEM TO BE SOLVED: To provide a network system wherein control apparatuses access each other without changing a plurality of kinds of network/FA middleware systems. SOLUTION: Control apparatuses (first and second PLC 10', 10"), an information processing apparatus 20 and an information conversion server 30 are connected via a network 1. The information conversion server comprises a command conversion area storing profile information containing names of protocols supported by the control apparatuses connected to the network, command information of protocols and command classes. When the information conversion server receives transmission data destined to a control apparatus that becomes a target, from the information processing apparatus, the information conversion server accesses the command conversion area and judges whether a command stored in the transmission data is comprehensible for the target control apparatus and if the command is comprehensible, the transmission data using the received command are transmitted to the target control apparatus but if the command is not comprehensible, the command is converted into a comprehensible command based on the profile information, so that generated transmission data are transmitted to the target control apparatus. COPYRIGHT: (C)2005,JPO&NCIPI
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