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51. 发明专利

JPH1185824A HIERARCHY DESCRIPTION METHOD FOR CONTROL CIRCUIT 失效
公开(公告)号：JPH1185824A
公开(公告)日：1999-03-30
申请号：JP24371897
申请日：1997-09-09
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SATO NAOYUKI , ESASHI ATSUSHI , ITO AKIO , SHIMIZU KATSUTO , KIMURA TORU , KOIBUCHI IKUO , OTOMO HIDEO
IPC分类号： G05B19/05 , G06F17/50
摘要： PROBLEM TO BE SOLVED: To describe higher-order blocks in a simple and easy-to-see state. SOLUTION: At the time of describing hierarchical macros 112a and 112b with a same function in higher-order block graphics 11b and 11c, the same input signal 23 and output signal 24 are described as a name in the input/output terminal of each macro. When the macros 112a and 112b use the medium-order block graphic 12b in common, the same signals 23 and 24 as the macros 112a and 112b in the graphic 12b. When large macros 111a and 111b belonging to the graphic 12b are provided with the same function and both of the use a low-order bloc graphic 13b, the names of the same input and output signals 25 and 26 as the macros 111a and 111b in the graphic 13b.

52. 发明专利

JPH10241379A PROGRAM REFRESHING METHOD OF NON-VOLATILE REWRITABLE MEMORY, CONTROL DEVICE AND CONTROL SYSTEM OF PROCESS 失效
公开(公告)号：JPH10241379A
公开(公告)日：1998-09-11
申请号：JP4588797
申请日：1997-02-28
申请人： HITACHI LTD
发明人： MOURI YUKIKO , SHIMIZU KATSUTO , MARUYAMA YOSHIO , ITO AKIO
IPC分类号： G11C16/02 , G06F12/06
摘要： PROBLEM TO BE SOLVED: To provide a method for refreshing an EEPROM(non-volatile rewritable memory) for storing a program of a control device constituting a control system including an autonomous distributed type and constitution being suitable for it. SOLUTION: Input/output control devices 8, 9, 10 provided with EEPROMs 27, 32, 37 constituting a control system and storing a program respectively are provided with respectively RAMs 26, 31, 36 for storing temporarily a program in an EEPROM. On the other hand, a maintenance tool 1 connected so as to be able to communicate through a network 11 and buses 12, 13 confirms permission/probation of refreshing, issues a refreshing command, and performs rewriting of program of EEPROMs 27, 32, 37. Furthermore, when refreshing is performed, software in the EEPROM is temporarily stored in a RAM and rewriting is performed, and the program temporarily stored is written in the EEPROM 27, 32, 37 again. Thereby, refreshing can be efficiently performed without malfunction.

53. 发明专利

JPH09312329A WAFER SUPPORT JIG, AND SEMICONDUCTOR MANUFACTURE USING IT 失效
公开(公告)号：JPH09312329A
公开(公告)日：1997-12-02
申请号：JP12559496
申请日：1996-05-21
申请人： HITACHI LTD , HITACHI TOKYO ELECTRONICS
发明人： ARAKAWA HISASHI , ITO AKIO
IPC分类号： B65D85/86 , H01L21/673 , H01L21/68
摘要： PROBLEM TO BE SOLVED: To prevent the adhesion of foreign matters to a semiconductor wafer and damages, and besides, reduce the space used at processing. SOLUTION: This wafer support jig comprises a wafer support jig body 3 which counterposes either the surfaces 1 or the rears 1b of adjacent semiconductor wafers 1 each and supports them as arranged in the vertical direction at least at the two places of each semiconductor wafer 1, and grooves 4 to separate adjacent semiconductor wafers. Then, the height 3f of the top 3d of the L-shaped plate 3a on the side of carrying in and out in the wafer support jig body 3 is made lower than the height 3g of the top 3e of the L-shaped plate 3c on the rear side, whereby the stability in carrying in and out the semiconductor wafer 1 can be improved.

54. 发明专利

JPH09274508A METHOD AND TOOL FOR MAINTAINING PLANT CONTROLLER 失效
公开(公告)号：JPH09274508A
公开(公告)日：1997-10-21
申请号：JP8232996
申请日：1996-04-04
申请人： HITACHI LTD
发明人： SHIMIZU KATSUTO , ITO AKIO , MARUYAMA YOSHIO , MOURI YUKIKO , NANAKAMADO YOUICHI
IPC分类号： G05B15/02 , G05B19/02
摘要： PROBLEM TO BE SOLVED: To suppress the erroneous recognition or the like of a setting change in spite of ability of an operator at the time of a change to ordinary operation after the end of maintenance and check, etc., by storing a main set value to be used at the time of ordinary operation and a temporarily set numerical value corrected at the time of maintenance in a storage means together with an identifying means for identifying either main setting or temporary setting. SOLUTION: In an auxiliary storage device 5 of a maintenance tool, the pair of a macro name and the main setting of macro is preserved for each controller 1. At the controller 1, the macros of computing elements are arranged in the order of arithmetic inside an execution program 11 for control. The data to be used for arithmetic by a macro arithmetic program are divided into analog data 14 or the like and stored in a work data area 13. A set value area 16 has an area 161 for storing a flag showing the temporary state of setting corresponding to the arrangement of these set values and when temporary setting is designated at the time of writing the set value from the maintenance tool, a flag showing temporary setting is turned on in the temporary state area 161 corresponding to this set value.

55. 发明专利

JPH08314505A SITE INSTALLATION-TYPE CONTROLLER 失效
公开(公告)号：JPH08314505A
公开(公告)日：1996-11-29
申请号：JP14828695
申请日：1995-05-23
申请人： HITACHI LTD
发明人： SHIMIZU KATSUTO , ITO AKIO , MOURI YUKIKO , MARUYAMA YOSHIO
IPC分类号： G05B15/02 , H04L12/28 , H04Q9/00
摘要： PURPOSE: To provide a site installation-type controller which is suitable for the reduction of process cable laying quantity, for the reduction of the area of a central controller room, for the manufacture of controllers, for the reduction of installation cost, for the shortening of an installation term and for the reduction of a test process after the controller is installed. CONSTITUTION: A process controller and a plant I/F (interface) part are detached from the controllers 6 controlling the process units 1 of a plant installed in the central controller room 10. Process controller storage control panels 5 and plant I/F control panels 4 are formed. The former panels are distributively arranged in distributive controller rooms 11 and the latter panels near the process units 1. Photoelectric conversion means which electrically insulate weak digital electronic units stored in the process controller storage control panels and strong power circuit which is stored in the plant I/F control panels and executing the process input/output of strong power are installed on the plant I/F control panels.

56. 发明专利

JPH08297511A ABNORMALITY DIAGNOSTIC DEVICE FOR PROCESS SIGNAL 失效
公开(公告)号：JPH08297511A
公开(公告)日：1996-11-12
申请号：JP12441095
申请日：1995-04-25
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： WATANABE KAZUHIKO , YOSHIDA TAKASHI , KUMAZAKI MASAYUKI , ITO AKIO
IPC分类号： G05B21/02 , G05B9/02 , G05B23/02
摘要： PURPOSE: To provide an abnormality diagnostic device for process signal which holds a normal process signal under normal control in the case of abnormality of the process signal and suitably carries on operation control over a plant in a normal state. CONSTITUTION: The abnormality diagnostic device which inputs the process signal 1 in every sampling cycle, diagnoses whether or not the process signal is abnormal, and outputs the result as a control signal is equipped with a monitor relay which detects abnormality when the process signal inputted in every cycle exceeds a previously set permissible range, an idle time unit which outputs the normal process signal of the inputted process signal that is a previously set time before, a signal holding means 10 which holds the process signal at the normal time, and a signal switch 17 which selects the held process signal at the normal time in the case of signal abnormality. Further, a variation rate limiting means is usable instead of the idle time means.

57. 发明专利

JPH06186170A METHOD AND APPARATUS FOR AUTOMATICALLY SENSING STATE CHANGE 失效
公开(公告)号：JPH06186170A
公开(公告)日：1994-07-08
申请号：JP33579792
申请日：1992-12-16
申请人： HITACHI LTD
发明人： SENOO MAKOTO , TSUCHIDA KENJI , ITO AKIO
IPC分类号： G01D1/18 , G01N21/88
摘要： PURPOSE:To provide a method and an apparatus for extracting a state change with high sensitivity and a state change region accurately by automatically deciding a decision level for sensing the change irrespective of an object to be monitored in a method and an apparatus for sensing the state change in an image to be monitored from a difference of projecting distributions of an image at the times of normal operation and monitoring. CONSTITUTION:The apparatus for automatically sensing a state change comprises an ITV camera (industrial television camera) 10, an image input circuit 20, an X-axis.Y-axis direction projecting distribution operating circuit 30, a projecting distribution averaging circuit 40, a normal time projecting distribution data memory 50, a normal and monitoring time projecting distribution difference operating circuit 60, an X-axis.Y-axis direction projecting distribution difference mean value operating circuit 70, an X-axis.Y-axis direction state change sensing decision level operating circuit 80, a monitoring time image state change presence/absence deciding circuit 90, a monitoring time image state change region extractor 100, and a state change sensing result display output circuit 110.

58. 发明专利

JPH04185090A ABNORMALITY MONITORING DEVICE 失效
公开(公告)号：JPH04185090A
公开(公告)日：1992-07-01
申请号：JP31509190
申请日：1990-11-20
申请人： HITACHI LTD , HITACHI INF & CONTROL SYST
发明人： ITO AKIO , SAWA SHUSUKE , OGAKI TAKASHI , FUJITA HIROFUMI
IPC分类号： H04N7/18 , G08B23/00 , G08B25/00
摘要： PURPOSE:To quickly and securely decide the abnormality of a monitoring object and the presence or absence of an object based on its dimension by changing the object for monitoring object and detecting the characteristic of the object on the picture as the difference of plural photographing screens with time difference. CONSTITUTION:A fan controller 2 starts a fan 1, an A/D converter 4 takes the picture of a stagnant pool on which wind-wrought patterns generate from a picture input device 3 to be stored in a picture memory 6 after starting ventilation. After storage, the ventilation is stopped. A difference calculating device 7 calculates the difference of the pictures of memories 5 and 6 before and after the ventilation to be stored in a calculation result memory 8. An abnormality decision device 9 decides the generation of abnormal pool in the monitoring object part by the difference picture of the memory 8. For the preparation of the next monitoring, a warning is generated by a warning device 10 in case of abnormality, and the processing is ended in case of no pool.

59. 发明专利

JPH01243825A VARIABLE-SPEED INDUCTION GENERATOR/MOTOR CONTROLLER 失效
公开(公告)号：JPH01243825A
公开(公告)日：1989-09-28
申请号：JP6956388
申请日：1988-03-25
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： ITO AKIO , SAWA SHUSUKE , SUGISAKA HIROSHI , KITA EIZO , NAKAGAWA HIROTO , ONO YASUTERU
IPC分类号： H02J3/24 , G05F1/70 , H02J3/18
摘要： PURPOSE:To distinguish the internal accident or communication failure of a cycloconverter or the AC system accident as a cause of detected overcurrent, by detecting input currents and output currents of a cycloconverter connected to the secondary side of an inductor so as to monitor its deviation. CONSTITUTION:At the time of an AC system accident, the current value INN which is obtained through a detector 22 on the input side of a cycloconverter becomes almost the same wave shape as that of output side current value IOUT, so that output ALPHAI of a comparator 19 becomes almost zero. On the other hand, at the time of cyclone converter commutation failure, since a thyristor convertor 151 on the positive connection side of the cycloconverter and a thyristor converter 152 on the reverse connection side open their gates at the same time, they constitute a closed circuit, and over-current flows to a current detector 22 and IOUT becomes nearly zero at a current detector 11. For this reason, the output I of a comparator 19 becomes a large negative value and at the point that exceeded the judgement value, the main engine stop instruction ST is issued by a monitor 20.

60. 发明专利

JPH01243819A ABNORMAL STATE DETECTOR FOR VARIABLE SPEED INDUCTION MACHINE 失效
公开(公告)号：JPH01243819A
公开(公告)日：1989-09-28
申请号：JP6956288
申请日：1988-03-25
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SUGISAKA HIROSHI , ITO AKIO , SAWA SHUSUKE , HARAGUCHI EIJI , UNO SEINOSUKE , YOKOYAMA ISAO
IPC分类号： H02H7/08 , H02P27/16
摘要： PURPOSE:To detect an abnormal state on the output bus line side of a cyclo- converter, by detecting current flowing in each phase output bus line of the cyclo-converter, and by monitoring the sum. CONSTITUTION:In a normal state, the amount of output currents I2U-I2W of the respective phases of cyclo-converters 2U, 2V, 2W are controlled in the shapes of three-phase sine waves, and so the sum I2S is made almost zero. When an abnormal state occurs in an output bus line 12U or the thyristor converter 2U, then the output I2S of the adder 201 of a current abnormal-state detector 22 exceeds a limit of the normal state, and from a detector 202, an output is produced, and from a memory circuit 203, an abnormal state detection signal OUT is generated. By controlling a device quickly via a protection logic 23 with this signal, the device can be protected.

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