| 摘要 |
The process control system has a central computer (201), a communication line (207), signal converter (208) with converter modules (209-212), output modules (225-226), an interface (213), power supply (214) and signal processing stage (208'). The converter modules connect with the process units, eg boiler (224), valves (222) and flow meters (221). Each of the converter modules has a memory to store data relevant to the sensor or valves.
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| 申请人 |
HITACHI, LTD., TOKIO/TOKYO, JP;HITACHI NAKA ELECTRONICS CO. LTD., IBARAKI, JP;HITACHI INSTRUMENTS ENGINEERING CO., LTD., HITACHINAKA, IBARAKI, JP |
发明人 |
KOBAYASHI, TERUO, HITACHINAKA, JP;ONO, KOJI, TSUCHIURA, JP;FUJITA, MASAHIRO, IBARAKI, JP;KITAKAMI, SHIGEMI, IBARAKI, JP;NOGUCHI, SHINZO, MITO, JP;NAGASE, RYOICHI, HITACHINAKA, JP |
