SU1251065A2 - Polyfunctional logic module - Google Patents

Abstract

The invention relates to the field of automation and computer technology. The invention is an improvement of the invention in accordance with a.ac, No. 915073. The purpose of the invention is to increase the testability of the module. The multifunctional logic module is designed to implement all the logical functions of two variables. The module contains elements AND, OR, NOT, two information inputs, two configuration inputs and four outputs. Depending on the tuning signals on the tuning inputs at each output of the module, a corresponding logic function is implemented. In order to increase the testability of the module, a control circuit has been introduced in it that allows detection of single constant faults in the elements of the module. The inputs of the control circuit are connected to the information and configuration inputs of the module and two outputs of the module on which the module elements are faulty. When a test sequence is applied to the module inputs, a high level signal appears at the output of the control circuit in the event of failure of one of the module elements. 2 pe. Table I S (l o) ate

Description

This invention relates to automation and computing.

1 {spruce of the invention - improving the testability of the module.

1 shows a functional diagram of a multi-functional logical module; FIG. 2 is a time diagram of the operation of the module.

The module contains information inputs and 2, configuration inputs 3

In the implementation part of the self-monitoring logic module works as follows.

The outputs 14 and 15 of the logic module (Fig. 2) show all the possibilities of the constant failures of CO and C G occurring at the outputs of the elements 5-9 of the module.

In cycle 1 of any operation mode 1 - IV, determined by the values of the signals on the tuning inputs 3 and 4, the inputs I and 2 of the module receive signals О О, which, inverted by the elements 16 and 17 to 1, respectively, go to the first and the third inputs of the element And 18 and turn it into a sensitive to the second input, which, if the module is healthy, receives the signal O from the output 14 of the module, and the output remains the signal O, and if there are faults in the C 1 module at the outputs of the And elements 7 - 9, at the output 14 of the module, an erroneous signal 1 occurs, which through the element AND 18 enters the element OR 22 and leads to the emergence of signal 1 at the control output 23, indicating the presence

1065

five

and 4, elements NOT 5 and 6, elements AND 7-9, elements OR 10 and 11, information outputs 12-15, elements NOT 16 and 17, elements AND 18-21, element 5 OR 22, control trigger 23.

The multifunctional logic module, in terms of the implementation of the functions, works according to the table 10 presented and implements all the logical functions of two variables.

malfunction. In cycle 2 of any mode of operation, the signals O 1 are fed to the inputs 1 and 2 of the module. In this case, the signal O from the information input of the module through the element NOT 16 enters the first input of the element I 19, from the input 2 of the module the signal 1 goes to the third input of the element 19 which becomes sensitive to the signal at the output of the I5 module, in the event of a fault with CO at the outputs of the AND 9 and HE 6 elements at the output 15 of the module, an erroneous signal 1 occurs, which, arriving at the second input of the AND 19 element, leads to the appearance of the I signal at its output is through an element OR 22 indicates a fault on signal 1 at output 23.

In cycle 3, in modes 111 and iV, only a fault with CO at the outputs of the elements AND 8 and HE 5 is visible, while on the set 1 O occurring at inputs 1 and 2 and the signal 1 at setup input 4, the element AND 20 becomes sensitive to an erroneous signal 1 that occurs at the output 15 of the module, which leads to the passage of signal 1 to the control

3

output 23, which indicates the presence of a malfunction,

In cycle 4, in modes T T and. U, there can be only a fault of CO at the output of element AND 7, while by dialing 1 1 at inputs 1 and 2 and the value of signal 1 at setup input 3, the element 21 is brought to a sensitive state, and in the event of an erroneous signal 1, at the beginning of module 15, the module output signal 23 monitors the signal 1, indicating a fault.

Claims (1)

Invention Formula Multifunctional logic module according to aut. St. No. 915073, which is intended for use by the user. by the fact that, in order to increase the testability of the module, the elements AND, OR, NOT are introduced into it, with the first information input of the module connected to the first 654 the inputs of the fourth and fifth elements AND and the input of the third element NOT, the output of which is connected to the first inputs of FiecToro and the seventh elements of AND, the second information input of the module is connected to the second 1 and inputs of the fifth and seventh elements of AND and the fourth element NO, the output of which is connected with the second inputs of the fourth and sixth elements And, the first and second configuration inputs - the module is connected to the third inputs of the fourth and fifth elements And, respectively, the direct output of the second element OR is connected to the third input of the sixth element And, the inverse output of the second element OR is connected to the third input of the seventh element AND and the fourth inputs of the fourth and fifth elements AND, the output of (i + 3) ro (i 1,4) element AND is connected respectively to the i-th input of the third element OR, the output of which is connected to the control output of the module. Compiled A.Fyodorov Editor B.Kogtcha Tekhred 0.Sopke Proofreader M.Samborska Order 4411/45. Circulation 671 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, F-3-5, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project 4 ftsg.g