| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate unwiring an existing field device. <P>SOLUTION: The field device is installed at the locations of various processes and is connected, through a signal line, to a host control computer system. Radio communication equipment is installed on the signal line, where the radio communication equipment comprises: a signal conversion means converting a signal passing through the signal line into a radio protocol; and a radio communication means radio-transmitting the radio protocol. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
