| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication terminal for remote monitoring of a refrigerating machine capable of transmitting/receiving large amount of data by LAN connection and preventing functional failure when attacked via the Internet. <P>SOLUTION: The communication terminal 20 includes a first block 21 and a second block 22 for delivering/receiving data to/from each other via a common memory 23. The first block 21 includes: a port 26 for RS-485 in which input/output of data related to the refrigerating machines 41, 42, ... is performed; a port 27 for RS-232C in which input/output of data related to an incidental facility 50 is performed; and a first CPU 24 controlling the operation of the ports. The second block 22 includes: a second memory 30 saving the data related to the refrigerating machines received from the first block 21 via the common memory 23; a port 33 for an LAN performing data input/output with a monitoring sensor 60 via the LAN; and a second CPU 29 controlling the operation of the second memory 30 and the port 33 for the LAN. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
