Invention Grant
US4864531A Error control apparatus using restore memory for recovering from parity
discordances in transmissions between controller and real-time I/O
devices
失效
使用恢复存储器从控制器和实时I / O设备之间的传输中的奇偶校验不一致中恢复的错误控制装置
- Patent Title: Error control apparatus using restore memory for recovering from parity discordances in transmissions between controller and real-time I/O devices
- Patent Title (中): 使用恢复存储器从控制器和实时I / O设备之间的传输中的奇偶校验不一致中恢复的错误控制装置
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Application No.: US102255Application Date: 1987-09-28
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Publication No.: US4864531APublication Date: 1989-09-05
- Inventor: Jesse T. Quatse , Lionel Heitz , Jacky Pergent , Olivier Penot
- Applicant: Jesse T. Quatse , Lionel Heitz , Jacky Pergent , Olivier Penot
- Applicant Address: FRX
- Assignee: La Telemecanique Electrique
- Current Assignee: La Telemecanique Electrique
- Current Assignee Address: FRX
- Priority: FRX8309540 19830603
- Main IPC: G05B19/02
- IPC: G05B19/02 ; G05B9/02 ; G05B19/04 ; G05B19/048 ; G05B19/05
Abstract:
An input/output device monitors the transmission of information between a processor of a programmable controller and sensors and actuators of a process to be controlled. This device includes electronic circuits adapted for calculating the parities of the digital words which pass therethrough, these parities being compared with corresponding parities calculated by the processor which thereafter invalidates the words having two different parities.
Public/Granted literature
- USD431820S Telephone handset Public/Granted day:2000-10-10
Information query
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