Abstract: A system program includes a procedure library in which at least a procedure for controlling execution of a control program and a procedure for controlling output of output data and input of input data are included. If schedule-building data including execution order specifications for the procedures included in the procedure library is stored in a storage section, the system program causes a microprocessor to execute the procedures included in the procedure library in accordance with the procedure execution order specifications included in schedule-building data.

Abstract: The present invention provides a technique for improving the reliability of access to a database system in a controller, such as a PLC. A PLC accessible to a database accesses a DB server in response to an event in which a user program calls a DB access processing program. The DB access processing program stores status information indicating a status of accesses to the DB server in a nonvolatile memory, in accordance with an instruction of the user program. When a power interruption occurs, the PLC can obtain a status of accesses to the DB server at the timing of the occurrence of the power interruption by referring to the status information. Then, the PLC, for example, re-sends a SQL sentence, depending on the access status.

Abstract: A system program causes, as an execution preparation process for a control operation of a PLC, execution of a process for generating a reception buffer for storing received input data, and execution of a process for generating, for each input data referred to by a control program, an input synchronization buffer used by the control program as a reference target for the input data. The system program causes, as an execution control process for the control operation of the PLC, execution of an input copy process for copying the received input data from the reception buffer to the input synchronization buffer corresponding to the input data, and execution of a control program start process for starting execution of the control program.

Abstract: A scheduler causes a microprocessor to start execution of a first control program after a communication circuit transmits output data and receives input data in a control cycle following a control circle in which execution of the first control program has ended, and causes execution of an unexecuted portion of the first control program in a control cycle following a control cycle in which execution of the first control cycle has not ended.

Abstract: The system program includes, as an execution control process of the control program, an owner-side start process that starts execution of an owner-side control program; a copy process in which, when execution of the owner-side control program ends, a global variable that is rewritten by the owner-side control program is copied from a global variable area to a synchronous buffer corresponding to the global variable; and a referrer-side start process that starts execution of a referrer-side control program.

Abstract: A scheduler program includes a command to start execution of a motion calculation program in each motion control cycle, a command to cause a microprocessor to start execution of a first user program in each first user program execution control cycle, and a command to repeat output processing and input processing, start of execution of the first user program, end of execution of the first user program, and start of execution of the motion calculation program in this sequence for every period corresponding to the period of the first user program execution cycle.

Abstract: A microprocessor controls at least one of a first communication circuit and a second communication circuit such that a first input/output process and a second input/output process are executed in parallel. The first input/output process includes a process outputting output data from a first transfer buffer, through the first communication circuit, to a first instrument in a PLC system bus, and a process inputting input data from the first instrument, through the first communication circuit, to the first transfer buffer. The second input/output process includes a process outputting output data from a second transfer buffer, through the second communication circuit, to a second instrument in a field network, and a process inputting input data from the second instrument, through the second communication circuit, to the second transfer buffer.

Abstract: A system includes a first execution control instruction to start execution of a first control program every first execution cycle of the same period as a control cycle period and a second execution control instruction to start execution of a second control program every second execution cycle whose period is an integral multiple of at least twice the control cycle period. The second execution control instruction includes an instruction to start, in a control cycle in which a second execution cycle starts, execution of the second control program after the end of execution of the first control program, and if the second control program is not completed before the end of the control cycle, to start execution of an unexecuted part of the second control program after the end of execution of the first control program in the next control cycle.

Abstract: A discharge lamp includes an arc tube and a boron oxide film formed on an inner surface of the arc tube.

Abstract: A discharge lamp includes an arc tube made of quartz glass and enclosing a light emitting substance, and an electrode mainly made of tungsten and arranged in the arc tube, the electrode including at least one getter material that binds with oxygen.

Abstract: A system includes a first execution control instruction to start execution of a first control program every first execution cycle of the same period as a control cycle period and a second execution control instruction to start execution of a second control program every second execution cycle whose period is an integral multiple of at least twice the control cycle period. The second execution control instruction includes an instruction to start, in a control cycle in which a second execution cycle starts, execution of the second control program after the end of execution of the first control program, and if the second control program is not completed before the end of the control cycle, to start execution of an unexecuted part of the second control program after the end of execution of the first control program in the next control cycle.

Abstract: A system program causes, as an execution preparation process for a control operation of a PLC, execution of a process for generating a reception buffer for storing received input data, and execution of a process for generating, for each input data referred to by a control program, an input synchronization buffer used by the control program as a reference target for the input data. The system program causes, as an execution control process for the control operation of the PLC, execution of an input copy process for copying the received input data from the reception buffer to the input synchronization buffer corresponding to the input data, and execution of a control program start process for starting execution of the control program.

Abstract: A discharge lamp includes a pair of electrodes for discharge and a discharge container having an inner space formed by quartz glass for separately placing the pair of electrodes and enclosing a discharge medium therein, a bulging part that surrounds the inner space, a pair of sealing parts that extend from ends of the bulging part and respectively support the pair of electrodes, an inner protective layer provided from a top portion opposed to a center of the pair of electrodes to a peripheral portion located at sides of the pair of sealing parts on an inner surface of the bulging part and having a thickness of the peripheral portion thinner than that of the top portion.

Abstract: A device package structure includes: a base body having a conductive connection portion and a level difference portion; a device arranged on the base body, having a connection terminal electrically connected to the conductive connection portion via the level difference portion on the base body; and a connector electrically connecting the connection terminal and the conductive connection portion, having substantially the same height as a height of the level difference portion.

Abstract: A discharge lamp that includes an arc tube made from silica glass, and a modified layer as a boron- or germanium-diffused layer formed in an inner surface of the arc tube.

Abstract: A discharge lamp includes an arc tube, a first protection film mainly made of a metal oxide and formed on an inner surface of the arc tube, and a second protection film mainly made of boron nitride or boron oxide and formed on the first protection film.

Abstract: A discharge lamp includes an arc tube and a boron oxide film formed on an inner surface of the arc tube.

Abstract: A discharge lamp includes an arc tube made of quartz glass and enclosing a light emitting substance, and an electrode mainly made of tungsten and arranged in the arc tube, the electrode including at least one getter material that binds with oxygen.

Abstract: A device package structure includes: a base body having a conductive connection portion and a level difference portion; a device arranged on the base body, having a connection terminal electrically connected to the conductive connection portion via the level difference portion on the base body; and a connector electrically connecting the connection terminal and the conductive connection portion, having substantially the same height as a height of the level difference portion.

Abstract: A device package structure includes: a base body having a conductive connection portion and a level difference portion; a device arranged on the base body, having a connection terminal electrically connected to the conductive connection portion via the level difference portion on the base body; and a connector electrically connecting the connection terminal and the conductive connection portion, having substantially the same height as a height of the level difference portion.