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END COVER, PROGRAMMABLE LOGIC CONTROLLER DEVICE INCLUDING THE SAME, END COVER MOUNTING PRESENCE/ABSENCE CONFIRMATION METHOD AND FAILURE DIAGNOSTIC METHOD FOR THE PROGRAMMABLE LOGIC CONTROLLER DEVICE
END COVER, PROGRAMMABLE LOGIC CONTROLLER DEVICE INCLUDING THE SAME, END COVER MOUNTING PRESENCE/ABSENCE CONFIRMATION METHOD AND FAILURE DIAGNOSTIC METHOD FOR THE PROGRAMMABLE LOGIC CONTROLLER DEVICE
PROBLEM TO BE SOLVED: To provide a PLC device allowing certain and easy failure diagnosis of a bus signal and allowing confirmation of presence/absence of mounting of an end cover by equipping a bus interface (hereinafter bus I/F), a register for a bus function, and a bus failure-diagnosing register in the end cover of the PLC device.;SOLUTION: A CPU unit communicates with the bus I/F 61 of this end cover 6 in start-up or at prescribed time intervals, and reads end cover peculiar information 621 of the register 62 for the bus function to confirm the presence/absence of the end cover 6. The CPU unit communicates with the bus I/F 61 of the end cover 6 at prescribed time intervals, writes prescribed failure diagnostic data into the bus failure-diagnosing register 63, thereafter reads the failure diagnostic data from the bus failure-diagnosing register 63, and compares the previously stored failure diagnostic data and the read failure diagnostic data to diagnose failure of a bus.;COPYRIGHT: (C)2011,JPO&INPIT
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机译：要解决的问题：提供一种PLC设备，该设备可以通过配置总线接口（以下称为总线I / F）来对总线信号进行一定且容易的故障诊断，并可以确认是否存在端盖安装。总线功能，以及PLC设备端盖中的总线故障诊断寄存器。;解决方案：CPU单元在启动时或在规定的时间间隔内与该端盖6的总线I / F 61通信，并读取总线功能寄存器62的端盖特殊信息621，以确认端盖6的存在/不存在。CPU单元以规定的时间间隔与端盖6的总线I / F 61通信，写入规定的故障诊断数据输入到总线故障诊断寄存器63中，然后从总线故障诊断寄存器63中读取故障诊断数据，并将先前存储的故障诊断数据与读取的故障诊断数据进行比较以诊断总线故障。 ：（C）2011，JPO＆INPIT
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