| 摘要 |
PURPOSE: The elements for communication only which have reliability for CAN communication have not been provided. And various interface channels between the boards for CAN communication don t have supplied. CONSTITUTION: The control board is connected with the object machine to be controlled, through digital input(170) and output(160), and an analog input(180). The state of the object machine is monitored through eight digital input parts(170) and six analog input parts(180). The eight digital output parts(160) control the object machine through the operation of relays. Data is exchanged with other object machines(200) or the central computer(500) through the CAN port(130, 140). During the step of development, the serial port(150) connects the host computer(300) with the control board(100)(as it downloads and uploads the control program, etc.). After the development, the control board(100) supports the communication data conversion function, if necessary, when it is connected with the central computer(500), etc. Consequentially, the control board widely applicable to various machinery, with a built-in feature of a multi-drop Controller Area Network(CAN) communication terminal, is provided to perform the control function and communication function of the entire distributed system. The design of a separate interface circuit is unnecessary.
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