发明名称 |
Programmable controller with back-up capability |
摘要 |
An active programmable controller services I/O racks which contain circuits that interface with sensing devices and operating devices on a machine being controlled. A back-up programmable controller monitors this I/O data to maintain a current I/O image table in its memory. Other status data is coupled to the back-up controller from the active controller through a peer-to-peer communications link. If a malfunction occurs in the active controller, the back-up controller is signaled to switch to the active mode in which it assumes control of the operating devices on the machine being controlled.
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申请公布号 |
US4521871(A) |
申请公布日期 |
1985.06.04 |
申请号 |
US19820367594 |
申请日期 |
1982.04.12 |
申请人 |
ALLEN-BRADLEY COMPANY |
发明人 |
GALDUN, DANIEL J.;GRUDOWSKI, RAYMOND A.;FLOOD, MARK A. |
分类号 |
G05B19/05;G06F11/20;(IPC1-7):G06F15/46 |
主分类号 |
G05B19/05 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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