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公开(公告)号:US5446868A
公开(公告)日:1995-08-29
申请号:US943635
申请日:1992-09-11
IPC分类号: H04L12/46 , G06F13/42 , G06F15/173
CPC分类号: H04L12/4625
摘要: A network bridge between a DEC Ethernet network using LAT protocol and an Allen-Bradley Data Highway/Data Highway Plus (DH/DH+) network eliminates the need to use a DEC terminal server and Allen-Bradley KE/KF2 interface with their low data rates. A terminal server emulator is electrically connected to the DEC Ethernet network for stripping the LAT protocol from the DEC Ethernet network and provide DF1 formatted data. A converter module is electrically connected between the terminal server emulator and the DH/DH+ network for converting the DF1 data into DH/DH+ protocol data and for transmitting this data to the DH/DH+ network. The converter also converts data using DH/DH+ protocol which is received from the DH/DH+ network into DF1 data and transmits this data to the terminal server emulating means. The terminal server emulating means then places the DF1 formatted data into LAT packets and transmits the LAT packets to the Ethernet network. The terminal server preferably includes a commercially available LAT engine. The terminal server emulator and the converter preferably run on a general purpose microcomputer which includes an Ethernet interface board and an Allen-Bradley interface board.
摘要翻译: 使用LAT协议的DEC以太网和Allen-Bradley Data Highway / Data Highway Plus(DH / DH +)网络之间的网桥不需要使用DEC终端服务器和Allen-Bradley KE / KF2接口及其低数据速率 。 终端服务器仿真器电连接到DEC以太网,用于从DEC以太网网络剥离LAT协议,并提供DF1格式的数据。 A转换器模块电连接在终端服务器仿真器和DH / DH +网络之间,用于将DF1数据转换为DH / DH +协议数据,并将该数据发送到DH / DH +网络。 转换器还使用从DH / DH +网络接收的DH / DH +协议将数据转换为DF1数据,并将该数据发送到终端服务器仿真装置。 然后,终端服务器模拟装置将DF1格式化的数据放入LAT数据包,并将LAT数据包发送到以太网。 终端服务器优选地包括市售的LAT引擎。 终端服务器仿真器和转换器优选地在包括以太网接口板和Allen-Bradley接口板的通用微型计算机上运行。
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公开(公告)号:US4956777A
公开(公告)日:1990-09-11
申请号:US204336
申请日:1988-06-09
申请人: Thomas W. Cearley , Michael F. Donovan , Raymond A. Gardea, II , Kolleen C. Hughes , William R. Hunt, III , William R. Jarvis , Marvin R. Martin , Aftab Shamb , Michael D. Shepard , William F. Summers , David C. Twine , Lonnie M. Utt, Jr.
发明人: Thomas W. Cearley , Michael F. Donovan , Raymond A. Gardea, II , Kolleen C. Hughes , William R. Hunt, III , William R. Jarvis , Marvin R. Martin , Aftab Shamb , Michael D. Shepard , William F. Summers , David C. Twine , Lonnie M. Utt, Jr.
IPC分类号: B61L27/04 , G05B19/418 , G05D1/02 , G08G1/0968
CPC分类号: G05D1/0297 , B61L27/04 , G05B19/41865 , G05B19/41895 , G05D1/0265 , G05B2219/31002 , G05B2219/31286 , G05B2219/31432 , G05D2201/0216 , Y02P90/10 , Y02P90/20 , Y02P90/285
摘要: The system includes a first computer for communicating with automatic guided vehicles on a guided vehicle loop and storing information related to vehicle position. A second computer determines vehicle destinations. The first computer and the second computer maintain separate databases. Information in the data of the first computer relating to vehicle position is copied into the database of the second computer to assist in making vehicle destination determinations and the vehicle destination information stored in the database of the second computer is copied into the first computer. The invention also includes a unique fast and slow polling routine to insure that data transfer to the vehicles requiring it most is achieved in any polling cycle.
摘要翻译: 该系统包括第一计算机,用于与导向车辆回路上的自动导向车辆通信并存储与车辆位置有关的信息。 第二台计算机确定车辆目的地。 第一台计算机和第二台计算机维护单独的数据库。 将与车辆位置相关的第一计算机的数据中的信息复制到第二计算机的数据库中以辅助进行车辆目的地确定,并将存储在第二计算机的数据库中的车辆目的地信息复制到第一计算机中。 本发明还包括一种独特的快速和慢速轮询程序,以确保在任何轮询周期中实现对最需要它的车辆的数据传输。
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