Sequence display apparatus and method

In a sequence display apparatus comprising a sequence control device for performing a logical operation between input signals in accordance with a logical operation program to deliver a control signal in accordance with the result of said logical operation, a cathode ray tube control unit for displaying a logical circuit having a function corresponding to said logical operation program on the display surface of a cathode ray tube, and a sequence display control unit for converting said logical operation program into data for displaying said logical circuit on said display surface, and for converting data from a keyboard into said logical operation program, the improvement wherein said sequence control device, said cathode ray tube control unit and said sequence display control unit are combined so that a symbol indicating the kind of logical function conducted by a logical circuit is displayed, so that each of the symbols corresponding to all kinds of logical functions is arranged in a block having A picture elements in the longitudinal direction and B picture elements in the transverse direction, and so that a signal line is arranged between blocks.

A sequence display apparatus comprising a sequence control device for performing a logical operation between input signals in accordance with a logical operation program to deliver a control signal in accordance wit the result of said logical operation, a cathode ray tube control device for displaying a logic circuit having a function corresponding to said logical operation program on the display surface of a cathode ray tube, and a sequence display control device for converting said logical operation program into data for displaying said logical circuit on said display surface, and for converting data from a keyboard into said logical operation program,

• said keyboard being provided thereon with logical function specifying keys for specifying one of a plurality of logical functions conducted by logical circuits and with keys for specifying the name of the input signal and the name of the output signal, whereby a key-in operation for composing a program is performed in such a manner that one logical function, all of the names of the input signals and the name of the output signal form one set. PG,52

In a sequence display apparatus comprising a sequence control unit for performing a logical operation between input signals in accordance with a logical operation program to deliver a control signal in accordance with the result of said logical operation, a cathode ray tube control unit for displaying a diagram representing a function corresponding to said logical operation program on the display surface of a cathode ray tube, and a sequence display control unit for converting said logical operation program into data for displaying said logical circuit on said display surface, and for converting data from a keyboard into said logical operation program, the improvement comprising:

• means including a keyboard having logic function keys for specifying the kind of logical function and signal name keys for specifying the name of input and output signals for performing a key-in operation for composing a program;
• and wherein
• said sequence display control unit includes means for generating a group of command codes corresponding to the name of the input signal and the name of the output signal, respectively, designated through said keyboard, said group of command codes being determined by the kind of logical function and the number of input signals, whereby a logical operation program for each logical function is composed.

In a sequence display apparatus comprising a sequence control device for performing a logical operation between input signals in accordance with a logical operation program to deliver a control signal in accordance with the result of said logical operation, a cathode ray tube control device for displaying a logical circuit having a function corresponding to said logical operation program on the display surface of a cathode ray tube, and a sequence display control device for converting said logical operation program into data for displaying said logical circuit on said display surface, and for converting data from a keyboard into said logical operation program, the improvement wherein said display surface is divided into a first region for displaying a character each time information is inputted from said keyboard by a key-in operation, a second region for displaying a character each time a key-in operation for inputting the name of input signal and the name of output signal is performed and for displaying one logic symbol at a predetermined position in said second region, and a third region for displaying said name of input signal, said name of output signal and said logic symbol after all of said name of input signal, said name of output signal and the kind of logical function have been inputted by a key-in operation.