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公开(公告)号：US4263647A
公开(公告)日：1981-04-21
申请号：US9938
申请日：1979-02-07
IPC分类号： G05B19/4063 , G06F11/00 , G06F13/32 , G06F15/16 , G06F11/30
CPC分类号： G06F11/0757 , G05B19/4063 , G06F11/0724 , G06F13/32 , G05B2219/34466
摘要： Associated with each processor in a multiprocessor numerical control system is a watchdog timer circuit which is periodically reset by its processor under normal operating conditions. If a malfunction should occur in one of the processors, its watchdog timer is not reset and it times out. A fault monitor line connects to each watchdog timer circuit and an emergency stop circuit, and when a malfunction occurs in any one of the processors, this condition is indicated to all the processors and to the emergency stop circuit.
摘要翻译： 与多处理器数控系统中的每个处理器相关联的是看门狗定时器电路，其在正常操作条件下由其处理器周期性地复位。 如果其中一个处理器发生故障，则其看门狗定时器不会复位并超时。 故障监视线路连接到每个看门狗定时器电路和紧急停止电路，并且当在任何一个处理器中发生故障时，向所有处理器和紧急停止电路指示该状况。
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公开(公告)号：US4228495A
公开(公告)日：1980-10-14
申请号：US970959
申请日：1978-12-19
IPC分类号： G05B19/414 , G05B19/18 , G06F15/16
CPC分类号： G05B19/4147 , G05B2219/34418 , G05B2219/36153
摘要： A numerical control system includes a main processor which performs such functions as interpolation and outputting of motion command signals to the servomechanisms on a machine tool. A separate programmable interface processor connects to the main processor bus structure and it operates as a programmable controller to control the discrete digital I/O devices associated with the machine tool. A third processor couples through a serial data link with the main processor and it operates to service peripheral I/O devices associated with the front control panel on the numerical control system.
摘要翻译： 数字控制系统包括主处理器，其执行诸如运动命令信号的插值和输出到机床上的伺服机构的功能。 单独的可编程接口处理器连接到主处理器总线结构，并且其作为可编程控制器来操作与机床相关联的离散数字I / O设备。 第三处理器通过串行数据链路与主处理器耦合，并且操作用于维护与数控系统上的前控制面板相关联的外设I / O设备。
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