Patent ID: 6263380
Filing Date: 2001-07-17
Classification: G06F,G06Q

Abstract:
A measurement data processing unit for use with at least one measuring device, comprising:a plurality of relaying units to which the at least one measuring device can be connected, each relaying unit being serially connected to the preceding and succeeding relaying unit through a cable;processing means for collecting and processing the measurement data transmitted from each relaying unit;a measurement-data line and a command-data-line connecting each relaying unit to said processing means in parallel;a transmitting-line connecting each adjacent relaying unit to report completion of data-transmission of the preceding relaying unit to the succeeding relaying unit in sequence;wherein each relaying unit has a transmitting-line-abnormality detecting means for detecting an abnormality of at least one of the preceding relaying unit and the cable from a condition of the transmission-completion signal;a data-transmission-identifying-line connecting each relaying unit to said processing means in parallel for transmitting a transmission-identifying signal to switch a signal value on condition that the measurement data is transmitted from all of the relaying units;wherein each relaying unit is provided with an identifying-line-abnormality detecting means for detecting an abnormality of at least one of the other relaying units and the cable from the condition of the transmission-identifying signal; andwherein which one of the preceding relaying unit and the cable is abnormal is determined by combining a detected condition of the transmitting-line-abnormality detecting means and the identifying-line-abnormality detecting means.