Control system with diagnosis function

Claim 2

A multiplex control system, comprising: a plurality of test signal generating means (J1, J2) provided, respectively, in correspondence with a plurality of control apparatuses (1) installed in parallel with one another, for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) for selecting from the signals produced by said plurality of control apparatuses (1 ) a signal for operating a device (13) under control; and a plurality of diagnosis units (2) for deciding the presence or absence of abnormality in said signal selecting means (10) on the basis of the signals inputted to said signal selecting means and the signal outputted therefrom.

Claim 3

A multiplex control system according to claim 1, wherein said signal selecting means (10) is so arranged as to output an actuation signal for operating said device (13) under control, when a predetermined number of signals of those outputted from said plurality of control apparatuses (1) indicate that said device (13) under control is to be operated.

Claim 4

A multiplex control system according to claim 1, or claim 2,wherein said diagnosis unit (2) includes said test signal generating means (J1,J2)

Claim 5

A multiplex control system according to any one of claims 1 to 3, wherein said diagnosis unit (2) operate asynchronously with one another.

Claim 6

A multiplex control system, comprising: a plurality of test signal generating means (J1, J2) provided, respectively, in correspondence with a plurality of control apparatuses (1) installed in parallel with one another, for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) for selecting from the signals produced by said plurality of control apparatuses (10) a signal for operating a device (13) under control; and a plurality of diagnosis units (2) each including first abnormality decison means for deciding presence or absence of abnormality in said signal selecting means (10) on the basis of the signals inputted to said signal selecting means (10) and the signal outputted therefrom and second abnormality decision means for deciding presence or absence of abnormality in the other diagnosis units on the basis of at least one of said signals inputted to said signal selecting means.

Claim 7

A multiplex control system, comprising: a plurality of test signal generating means (J1, J2) provided, respectively, in correspondence with a plurality of control apparatuses (1) installed in parallel with one another, for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) for selecting from the signals produced by said plurality of control apparatuses (10) a signal for operating a device (13) under control; and a plurality of diagnosis units (2) each including first abnormality decison means for deciding presence or absence of abnormality in said signal selecting means (10) on the basis of the signals inputted to said signal selecting means (10) and the signal outputted therefrom and second abnormality decision means for deciding presence or absence of abnormality in the other diagnosis units on the basis of at least one of said signals inputted to said signal selecting means.

Claim 8

A multiplex control system, comprising: a plurality of test signal generating means (J1, J2) provided, respectively, in correspondence with a plurality of control apparatuses (1) installed in parallel with one another, for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) for selecting from the signals produced by said plurality of control apparatuses (10) a signal for operating a device (13) under control; latch devices (41) including memory means for storing the signals inputted to said signal selecting means (10) and those of the signals outputted from said signal selecting means which have undergone a change; and a plurality of diagnosis means (2) for deciding presence or absence of abnormality in said signal selecting means (10) on the basis of said signals stored in said latch means (41).

Claim 9

A multiplex control system, comprising: a plurality of test signal generating means (J1, J2) provided, respectively, in correspondence with a plurality of control apparatuses (1) installed in parallel with one another, for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) for selecting from the signals produced by said plurality of control apparatuses (10) a signal for operating a device (13) under control; latch devices (41) including memory means for storing the signals inputted to said signal selecting means (10) and those of the signals outputted from said signal selecting means which have undergone a change; and a plurality of diagnosis means (2) for deciding presence or absence of abnormality in said signal selecting means (10) on the basis of said signals stored in said latch means (41).

Claim 10

A multiplex control system according to claim 6, wherein said diagnosis means includes means for outputting a reset signal to said memory means of said latch device (41) upon reception of said input signal and said output signal to and from said signal selecting means (10).

Claim 11

A multiplex control system according to any one of the preceding claims which includes said plurality of control apparatuses (1), each of said control apparatuses including control signal generating means (K1) for outputting a control signal on the basis of an output signal of a sensor and test signal generating means (K2) for producing a test signal for diagnosis of abnormality.

Claim 12

A multiplex control system, comprising: a plurality of control apparatuses (1) disposed in parallel with one another, each for producing a control signal on the basis of an output signal of a sensor; a plurality of test signal generating means (J1,J2) provided, respectively, in correspondence with said plurality of control apparatuses (1), for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) including a plurality of logical elements (5,85) for receiving signals outputted from said plurality of control apparatuses thereby to select an operating signal for operating a device (13) under control from said received signals and output said operating signal upon selection thereof; a plurality of first signal detecting means (7, 8, 9) for detecting individually all the signals inputted to said signal selecting means; a plurality of second signal detecting means (11, 12) for detecting individually the outputs of said logical elements; a plurality of diagnosis units (2) provided in correspondence with said control apparatuses (1), each of said diagnosis units (2) including abnormality decision means (J5) for deciding the presence or absence of abnormality in said signal selecting means (10) on the basis of the outputs of test command signal generating means (J2) outputting a test command signal and the outputs of said first and second signal detecting means (7, 8, 9, 11, 12); and a plurality of signal change-over means (SW) for transmitting said test signal to said signal selecting means (10) in response to the input of said test command signal.

Claim 13

A multiplex control system, comprising: a plurality of control apparatuses (1) disposed in parallel with one another, each for producing a control signal on the basis of an output signal of a sensor; a plurality of test signal generating means (J1,J2) provided, respectively, in correspondence with said plurality of control apparatuses (1), for producing respective test signals for diagnosis of abnormality; at least one signal selecting means (10) including a plurality of logical elements (5,85) for receiving signals outputted from said plurality of control apparatuses thereby to select an operating signal for operating a device (13) under control from said received signals and output said operating signal upon selection thereof; a plurality of first signal detecting means (7, 8, 9) for detecting individually all the signals inputted to said signal selecting means; a plurality of second signal detecting means (11, 12) for detecting individually the outputs of said logical elements; a plurality of diagnosis units (2) provided in correspondence with said control apparatuses (1), each of said diagnosis units (2) including abnormality decision means (J5) for deciding the presence or absence of abnormality in said signal selecting means (10) on the basis of the outputs of test command signal generating means (J2) outputting a test command signal and the outputs of said first and second signal detecting means (7, 8, 9, 11, 12); and a plurality of signal change-over means (SW) for transmitting said test signal to said signal selecting means (10) in response to the input of said test command signal.

Claim 14

A multiplex control system according to claim 9, wherein said signal selecting means (10) outputs said operating signal when a predetermined number of the signals of those outputted from said plurality of control apparatuses (1) indicate that said device (13) under control is to be operated.