Abstract: An elevator drive unit includes a drive shaft having at least one drive section for driving a drive belt. The drive unit also includes an electromotor, for driving the drive shaft having a stator and a rotor, a brake for braking the drive shaft, and a frame for supporting the drive shaft, the stator and the brake.

Abstract: A protection arrangement for inaccessibly located power distribution equipment includes a first enclosure with power equipment and sensors, a second enclosure adjacent the first enclosure and including a signal handling device, at least one sealed electrical conductor passage between the first and second enclosures, each comprising at least one penetrator through the walls of the first and second enclosures. The signal handling device in the second enclosure is connected to the sensors in the first enclosure via electrical conductors passing through said sealed electrical conductor passages and to an external protection device via a communication link. The signal handling device receives electrical sensor signals from the sensors and shapes them for submission to the external protection device.

Abstract: A pressure resistant housing for an electric component, which pressure resistant housing is adapted for use in subsea applications. The pressure resistant housing includes a first ceramic body arranged to accommodate the electric component, which first ceramic body is provided with a first opening and a second opening, a first metal lid for closing the first opening, a first annular sealing member arranged to provide a fluid tight seal between the first metal lid and the first opening, a first clamp arranged to clamp the first metal lid to the first ceramic body, a second metal lid for closing the second opening, a second annular sealing member arranged to provide a fluid tight seal between the second metal lid and the second opening, and a second clamp arranged to clamp the second metal lid to the first ceramic body.

Abstract: A pressure resistant housing for an electric component, which pressure resistant housing is adapted for use in subsea applications. The pressure resistant housing includes a first ceramic body arranged to accommodate the electric component, which first ceramic body is provided with a first opening and a second opening, a first metal lid for closing the first opening, a first annular sealing member arranged to provide a fluid tight seal between the first metal lid and the first opening, a first clamp arranged to clamp the first metal lid to the first ceramic body, a second metal lid for closing the second opening, a second annular sealing member arranged to provide a fluid tight seal between the second metal lid and the second opening, and a second clamp arranged to clamp the second metal lid to the first ceramic body.

Abstract: A protection arrangement for inaccessibly located power distribution equipment includes a first enclosure with power equipment and sensors, a second enclosure adjacent the first enclosure and including a signal handling device, at least one sealed electrical conductor passage between the first and second enclosures, each comprising at least one penetrator through the walls of the first and second enclosures. The signal handling device in the second enclosure is connected to the sensors in the first enclosure via electrical conductors passing through said sealed electrical conductor passages and to an external protection device via a communication link. The signal handling device receives electrical sensor signals from the sensors and shapes them for submission to the external protection device.

Abstract: Supervision of industrial plants can be improved by comparison and analysis of process information and network information. The comparison may be used to provide alarms and operator information for network-related or process device failures. The information may also be used to identify a cause of a failure. A method is described for supervising an industrial control system, including a plant network for supervision, a client/server network for server connection with workstations, and a control network connected to industrial controllers. The method comprises the steps of gathering process information, and gathering network information, and by comparing information provided by data communications network monitoring with process control information and using the result of the comparison to assist in determining a cause of a problem or possible problem in a process controlled of the industrial control system.

Abstract: A computer based control system including a field network to which field devices equipped with hardware addresses and logical names are to be connected, a control device performing addressing control in relation to the field devices and their logical addresses and a simulation handling device. The simulation handling device has an own logical address, an own hardware address and is capable of obtaining a logical address, as well as possibly a logical name and/or a hardware address of at least one field device involved in the simulation. It notifies the control device that the field device is connected to the field network, detects a control signal directed towards field device addressed using the logical and/or hardware address of this field device and responds to the control signal with simulation results using the same logical and/or hardware address as the source of the response.

Abstract: Controller capable of executing non-safety-related control logic. A safety module is added to the controller in order to increase the safety-integrity level of a control system. The controller is able to execute safety-related control of real-world objects. Such a control system may exist at an offshore production platform or in a hazardous area of a chemical plant.

Abstract: A method to revalidate a compiler intended for compilation of a user-written program for safety control in an industrial control system after it has been used. A test program is compiled a first time which test program is defined in a control language. The compiler is validated by verifying that the test program executes correctly. A first software is generated derived from the compiled test program intended for later comparison purposes. The test program is compiled a second time after the compilation of a user-written program. A second software is generated intended for a comparison based on the second compilation of the test program. The first software is compared with the second software, wherein the compiler is revalidated for any errors introduced between the first and the second compilation. Provided that the revalidation indicates no errors in the compiler, the user-written program is enabled to execute in a device with safety features for control of real world entities.

Abstract: Supervision of industrial plants can be improved by comparison and analysis of process information and network information. The comparison may be used to provide alarms and operator information for network-related or process device failures. The information may also be used to identify a cause of a failure. A method is described for supervising an industrial control system, including a plant network for supervision, a client/server network for server connection with workstations, and a control network connected to industrial controllers. The method comprises the steps of gathering process information, and gathering network information, and by comparing information provided by data communications network monitoring with process control information and using the result of the comparison to assist in determining a cause of a problem or possible problem in a process controlled of the industrial control system.

Abstract: A method to detect a fault in a CPU of an industrial controller during on-line safety control of real world objects. An application program is complied into assembler instructions. A test application is complied into assembler instructions where the assembler instructions is a subset of the total number of assembler instructions available for the CPU. The application program is downloaded and the test application to a central unit of an industrial controller. The test application is repeatedly executed in the industrial controller. A result from the test application is repeatedly compared with the pre-defined result in the test module. A fault detected in the CPU as the result from the test application does not equal the pre-defined result stored in the test module and the unexpected result of the test application is due to the execution of an assembler instruction of the test application.

Abstract: A computer based control system including a field network to which field devices equipped with hardware addresses and logical names are to be connected, a control device performing addressing control in relation to the field devices and their logical addresses and a simulation handling device. The simulation handling device has an own logical address, an own hardware address and is capable of obtaining a logical address, as well as possibly a logical name and/or a hardware address of at least one field device involved in the simulation. It notifies the control device that the field device is connected to the field network, detects a control signal directed towards field device addressed using the logical and/or hardware address of this field device and responds to the control signal with simulation results using the same logical and/or hardware address as the source of the response.

Abstract: A method to detect a fault in a CPU of an industrial controller during on-line safety control of real world objects. An application program is complied into assembler instructions. A test application is complied into assembler instructions where the assembler instructions is a subset of the total number of assembler instructions available for the CPU. The application program is downloaded and the test application to a central unit of an industrial controller. The test application is repeatedly executed in the industrial controller. A result from the test application is repeatedly compared with the pre-defined result in the test module. A fault detected in the CPU as the result from the test application does not equal the pre-defined result stored in the test module and the unexpected result of the test application is due to the execution of an assembler instruction of the test application.

Abstract: Controller capable of executing non-safety-related control logic. A safety module is added to the controller in order to increase the safety-integrity level of a control system. The controller is able to execute safety-related control of real-world objects. Such a control system may exist at an offshore production platform or in a hazardous area of a chemical plant.

Abstract: A method to revalidate a compiler intended for compilation of a user-written program for safety control in an industrial control system after it has been used. A test program is compiled a first time which test program is defined in a control language. The compiler is validated by verifying that the test program executes correctly. A first software is generated derived from the compiled test program intended for later comparison purposes. The test program is compiled a second time after the compilation of a user-written program. A second software is generated intended for a comparison based on the second compilation of the test program. The first software is compared with the second software, wherein the compiler is revalidated for any errors introduced between the first and the second compilation. Provided that the revalidation indicates no errors in the compiler, the user-written program is enabled to execute in a device with safety features for control of real world entities.

Abstract: A compound of formula I ##STR1## wherein R stands for a straight or branched, saturated or unsaturated alkyl group containing from 4 to 12 carbon atoms optionally substituted with a hydroxy group, and possibly containing a ring structure, and in which at least one of the carbon atoms not bearing hydroxyl group is substituted with one or more halogen atoms or an azido group; and prodrugs of I in which one or more of the hydroxy groups are masked as groups which can be reconverted to hydroxy groups in vivo, in pure form or in mixtures. The compounds show antiinflammatory and immunomodulating effects as well as strong activity in inducing differentiation and inhibiting undesirable proliferation of certain cells. The compounds are prepared by oxidizing 1(S),3(R)-bis-(tert-butyldimethylsilyloxy)-20(S)formyl-9,10-seco-pregna-5( E),7(E),10(19)-triene, reducing the resulting product; alkylating the reduction product and then subjecting the alkylated product to triplet-sensitized photoisomerization.

Abstract: Compounds of formula ##STR1## wherein Q is a --CH.sub.2 --, --CH.dbd.CH-- or --C.dbd.C--; U is a C.sub.1 -C.sub.6 alkylene; R.sup.1 is hydrogen, a C.sub.1 -C.sub.4 alkyl or YR' in which Y stands for the radicals --SO-- or --SO.sub.2 -- and R' stands for a C.sub.1 -C.sub.4 alkyl; R.sup.2 and R.sup.3 are independently hydrogen or C.sub.1 -C.sub.4 alkyl, and additionally R.sup.2 and R.sup.3, when taken together with the starred carbon atom, may form a C.sub.3 -C.sub.6 carbocyclic ring; Z is hydrogen or hydroxy; and derivatives thereof. The compounds show antiinflammatory and immunomodulating effects as well as strong activity in inducing differentiation and inhibiting undesirable proliferation of certain cells. The compounds are prepared by adding an anion R.sup.- to 1(S),1(R)-bis-(tert-butyldimethylsilyl-oxy)-9,10-secopregna-5(E),7(E),10(1 9)-triene-20-one and the resulting compound is alkylated or acylated with R.sup.1 X.sup.1 where X.sup.

Abstract: The present invention relates to compounds of formula (I) ##STR1## in which R.sup.1 and R.sup.2 may be the same or different and stand for hydrogen, lower alkyl, lower cycloalkyl, or, taken together with the carbon atom (starred in formula I), bearing the groups X, R.sup.1 and R.sup.2, can form a C.sub.3 -C.sub.8 carbocyclic ring; X stands for hydrogen or hydroxy, R.sup.3 and R.sup.4, which may be the same or different stand for hydrogen, lower alkyl or halogen, n is 0, 1 or 2 and m is 0, 1 or 2. The present compounds, which find use both in the human and veterinary practice, show an immunomodulating effect as well as strong activity in inducing differentiation and inhibiting undesirable proliferation of certain cells, including cancer cells and skin cells.