PROGRAMMABLE CONTROL DEVICE

PROBLEM TO BE SOLVED: To obtain a programmable control device capable of specifying a disconnection place when the disconnection occurs in a cable by which a master station and a plurality of slave stations are connected by multidrop wirings and immediately performing normal communication without no...

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1. Verfasser:	KAWAMOTO HISAFUMI
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator	KAWAMOTO HISAFUMI
description	PROBLEM TO BE SOLVED: To obtain a programmable control device capable of specifying a disconnection place when the disconnection occurs in a cable by which a master station and a plurality of slave stations are connected by multidrop wirings and immediately performing normal communication without notifying the slave stations that the disconnection has been restored. SOLUTION: A central control part 30a of a slave station shifts to a disconnection diagnosis mode when a normal system receiving part 18 for receiving a frame at a baud rate in a normal mode can not receive a frame to its own station within a disconnection diagnosis mode switching time, performs communication with the master station at a baud rate in the disconnection diagnosis mode lower than the baud rate in the normal mode by using a diagnosis system transmitting part 24 and a diagnosis system receiving part 28, and continuously performs receiving processing by the normal system receiving part 18. When the normal system receiving part 18 receives a frame, the central control part 30a shifts from the disconnection diagnosis mode to the normal mode and communicates with the master station by using the normal system receiving part 18 and a normal system transmitting part 14. COPYRIGHT: (C)2007,JPO&INPIT
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SOLUTION: A central control part 30a of a slave station shifts to a disconnection diagnosis mode when a normal system receiving part 18 for receiving a frame at a baud rate in a normal mode can not receive a frame to its own station within a disconnection diagnosis mode switching time, performs communication with the master station at a baud rate in the disconnection diagnosis mode lower than the baud rate in the normal mode by using a diagnosis system transmitting part 24 and a diagnosis system receiving part 28, and continuously performs receiving processing by the normal system receiving part 18. When the normal system receiving part 18 receives a frame, the central control part 30a shifts from the disconnection diagnosis mode to the normal mode and communicates with the master station by using the normal system receiving part 18 and a normal system transmitting part 14. 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SOLUTION: A central control part 30a of a slave station shifts to a disconnection diagnosis mode when a normal system receiving part 18 for receiving a frame at a baud rate in a normal mode can not receive a frame to its own station within a disconnection diagnosis mode switching time, performs communication with the master station at a baud rate in the disconnection diagnosis mode lower than the baud rate in the normal mode by using a diagnosis system transmitting part 24 and a diagnosis system receiving part 28, and continuously performs receiving processing by the normal system receiving part 18. When the normal system receiving part 18 receives a frame, the central control part 30a shifts from the disconnection diagnosis mode to the normal mode and communicates with the master station by using the normal system receiving part 18 and a normal system transmitting part 14. 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SOLUTION: A central control part 30a of a slave station shifts to a disconnection diagnosis mode when a normal system receiving part 18 for receiving a frame at a baud rate in a normal mode can not receive a frame to its own station within a disconnection diagnosis mode switching time, performs communication with the master station at a baud rate in the disconnection diagnosis mode lower than the baud rate in the normal mode by using a diagnosis system transmitting part 24 and a diagnosis system receiving part 28, and continuously performs receiving processing by the normal system receiving part 18. When the normal system receiving part 18 receives a frame, the central control part 30a shifts from the disconnection diagnosis mode to the normal mode and communicates with the master station by using the normal system receiving part 18 and a normal system transmitting part 14. COPYRIGHT: (C)2007,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record>
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subjects	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title	PROGRAMMABLE CONTROL DEVICE
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