SU1374249A1 - Device for monitoring the switching of contacts - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used, for example, in automated process control systems. The purpose of the invention is to simplify: devices. The device contains- Live signal conditioners Initial setting 1, Reset 2, Interrupt enable 3, control channels 4, shake request signal conditioner 6, D-triggers 7, 9,10, NOT element 11, key block 12, channel 13 address dial, - the inverter 14, the dial-in field of the address of the contact group 15, the load element 40. When the contact is closed or opened, the interrupt demand signal is generated, and the computer, having received this signal, generates the interrupt enable signal. On this signal, the device sets on the output bus the state of the changed contacts and their address. After reading the information on the Reset signal, the device is set to its original position and is ready to receive initiative information. In the case when the signal arrives at the time of processing another signal, it is remembered, and after the end of the processing cycle, an interrupt request signal is generated. 4 il. (L

Description

(fluft

The invention relates to automation and computing and can be used, for example, in automated process control systems.

The purpose of the invention is to simplify the device.

Figure 1 shows the functionality of the device; 2 is a signal conditioner; FIG. 3 is an example of switching on a device by successively building up similar devices to increase the number of control contacts in FIG. 4 is a time diagram of the operation of the device.

The device (Fig. 1) contains signal formers ka 1, Reset 2, vani 3, channels 4 of control, containing monitored contacts 5.1-5.P, generator 6 of the interrupt request signal, first D-flip-flop 7, ele- 13742492

In order to increase the number of monitored contacts, devices can be combined by connecting input and output buses (states.

ten

15

Initial install Resolution 20

contacts, cell addresses, signal group addresses (initial setup, Interrupt Request, Reset, and Interrupt Enable).

The contact state registration system (Fig. 3) contains a control computer 23, a register 24, a computer communication interface 25, a device 2b for controlling the switching of contacts, a common pin 27. Each device 26 allows -control n-x m. contacts, where n is the number of cell contacts, m is the number of cells in the group.

A timing diagram explaining the operation of the device for controlling the switching of contacts is presented in FIG. 4, where: Signals Initial installation 28, Reset 29 Signal 30, input to input C

ment NAND (with open collector) 8, - first D-flip-flop, signal 31 with deactivated D-flip-flop 9, third D-flip-flop 10, element NOT (with open collector) 11, key block (.state of contacts) 12 , a dial-up field 13 of the channel address, an inverter 14, a dial-up field 15 of the address of a group of contacts.

The outputs of the elements AND-NE 8 of each channel are interconnected and form the logical element OR, the output of which is a demand signal signal (TPR). The outputs of the elements NOT 11 of each channel are combined with each other, forming the logical element OR, and are connected to the inverter 14, the output of which is connected to the set field 15 of the address of the contact groups. The same outputs of the groups of keys of contacts and cell addresses are combined and are, together with the codes of the group address, the output of the device. The formation of the interrogation request signal is performed by the driver, the circuit of which is represented in FIG. 2. The shaper contains the channel of forming the normalized signal, containing the inverters from the first to the third, 16-18, the first and second elements of the NAND 19 and 20 with an open collector, as well as resistors 21 and 22 connected to the power bus. When the state of one of the constants of the forming chain changes at the output of the latter, a pulse of a low LEVEL setting the intercept request signal appears.

thirty

40

the Q-turn of the first D-flip-flop that goes to the D-inputs of the second and third D-flip-flops, the signal 32 from the output Q of the second D-flip-flop, the signal 33 from the second Q-switch of the second D-flip-flop, the signal 34 from the output Q of the third D-flip-flop Pa, the signal 35 from the output Q of the third D-flip-flop, the signal Required interrupt 36 from the output of the element IS-HE 8 and the signal Enable interrupt 37.

35 In FIG. 2, a resistor 38 is also indicated a capacitor 39, and in FIG. 1, a load element 40.

The device works as follows.

When the power is turned on, the computer generates a pulse. The initial setup (LL) is a signal 28, which is fed to the R-inputs of the first D-flip-flops 7, and the pulse Reset is a signal 29, which

 arrives at the R-input of the second D-flip-flops 9 and the S-input of the third D-flip-flops 10 of each channel. At the same time, the Q output of the second D-flip-flops 9 (signal 32 and the output Q of the third D-flip-flops 10

50 (signal 35) each channel sets a low potential. The impulse NU (signal 28) Q-output of the first D-flip-flop 7 of each channel 4 is set to state 1, with

55 this, at the output of the NAND 8 element, a Low Level Cutoff Requirement (PST) 36 appears. The computer, having received this signal, gives the signal Permission Resolution (RPR) 37, which

13742492

In order to increase the number of monitored contacts, devices can be combined by connecting input and output buses (states.

contacts, cell addresses, signal group addresses, initial setup, interrupt request, reset and interrupt enable).

The contact state registration system (Fig. 3) contains a control computer 23, a register 24, a computer communication interface 25, a device 2b for controlling the switching of contacts, a common pin 27. Each device 26 allows you to control-f-x . contacts, where n is the number of contacts. cells, m is the number of cells in the group.

A timing diagram explaining the operation of the device for controlling the switching of contacts is shown in FIG. 4, where: Signals Initial setting 28, Reset 29, Signal 30 coming to input C

0

0

the Q-turn of the first D-flip-flop that goes to the D-inputs of the second and third D-flip-flops, the signal 32 from the output Q of the second D-flip-flop, the signal 33 from the second Q-switch of the second D-flip-flop, the signal 34 from the output Q of the third D-flip-flop Pa, the signal 35 from the output Q of the third D-flip-flop, the signal Required interrupt 36 from the output of the element IS-HE 8 and the signal Enable interrupt 37.

5 In FIG. 2, a resistor 38, a capacitor 39 are also indicated, and in FIG. 1, a load element 40.

The device works as follows.

When the power is turned on, the computer generates a pulse. The initial setup (LL) is a signal 28, which is fed to the R-inputs of the first D-flip-flops 7, and the pulse Reset is a signal 29, which

 arrives at the R-input of the second D-flip-flops 9 and the S-input of the third D-flip-flops 10 of each channel. At the same time, the Q output of the second D-flip-flops 9 (signal 32) and the output Q of the third D-flip-flops 10

0 (signal 35) each channel sets a low potential. Impulse. WELL (signal 28) the Q-output of the first D-flip-flop 7 of each channel 4 is set to state 1, with

5 this, at the output of the NAND 8 element, a Low Level Cutoff Requirement (TFR) 36 signal appears. The computer, having received this signal, gives the signal Permission Resolution (RPR) 37, which

initial state. However, the interrupt demand signal remains as it comes from subsequent cells.

Similarly, the remaining channels are polled in order of their following in the chain. This procedure repeats until the last one arrives at the C inputs of the second 9 and third 10 D-flip-flops of the first channel and establishes a high potential at the output Q of the second D-flip-flop 9 - signal 32. field 13 of the address of the first channel, as well as a dial-up field 15 of the group address The low level signal 33 is outputted from the output, which makes it possible to fix and Q the second D-flip-flop 9, the state of all contacts for the S-input of the first D-flip-flop 7 is received, and the device starts working. After this, the Q signal of the 31st signal at the C-input of the first D-flip-flop 7 is poured at its output. (initial state), thus the low potential of any channel can be received. The cue potential resets the request for 15 signal 30 from the generator 6 of the signal for interrupting the signal 36 of the first D-trigger interrupt request, and for the ger 7 of the first channel. After this, the output Q of the first D-flip-flop 7 of this computer reads the status of the outputs of the channel, a signal 31-1 appears, faults and a reset signal 29, which sets the second 9 and third 10 D-triggers to the initial state, and the blocks 12 keys of contacts and a dial-up field 13 close. Thereby, the interruption of the first cell is completed, and the interruption request from other cells is not removed, therefore the DPR 37 signal is generated, which is fed to the C inputs of the second 9 and third 10 D flip-flops of the first channel, while it is simpler consisting of on the second D-flip-flop 9 of the first channel-elements AND, EXCLUSIVE OR and NAND,

Connecting a signal to an open collector IS-NE 8 is designed to form a front.

and the computer receives the signal Requirement 20 interrupt (TPR) 36, the computer responds with a signal to the RPR 37, which passes through all the channels, up to the first one that requested the interruption, and then the signal stops propagating.

Thus, the third D-flip-flops 10 in each channel, which are supposed to be included, play the role of the highest-priority application node (ULVP), which is

la at output Q confirms O (signal 32), and in the third trigger 10, information at output Q (signal 35)

initial state. However, the interrupt demand signal remains as it comes from subsequent cells.

Similarly, the remaining channels are polled in order of their following in the chain. This procedure is repeated until the last channel, which allows the state of all contacts to be fixed at the moment the device starts operating. After that, the C input of the first D-trigger 7. Any channel can receive a signal 30 from the driver 6 of the interrupt request signal, while at the output Q of the first D-flip-flop 7 of this channel, a signal 31 - 1 appears, simpler than the CREC cell consisting of AND, AND EXCLUSIVE -NOT,

This allows you to record the status of all contacts at the moment the device starts working. After that, the C input of the first D-trigger 7. Any channel can receive a signal 30 from the driver 6 of the interrupt request signal, while at the output Q of the first D-flip-flop 7 of this channel, a signal 31 - 1 appears, simpler than the CREC cell consisting of AND, AND EXCLUSIVE -NOT,

and the computer receives the signal Interruption Request (TPR) 36, the computer responds with a signal to the RPR 37, which passes through all channels, up to the first one that requested the interruption, and then the signal stops propagating.

Thus, the third D-flip-flops 10 in each channel, which are supposed to be included, play the role of the highest-priority application node (ULVP), which is

changes from 0 to 1. This signal is the TPR signal in the case when the signal is the signal of the RPR for the next channel. The signal 35 from the output Q of the third D-flip-flop 10 is fed to the C input of the second 9 and third 10 D-flip-flops of the second channel. At the same time, the output Q in the second D-flip-flop 9 of the second channel is recorded 1, since the D-inputs of the second 9 and third 10 D-flip-flops are set to 1 by the initial setup pulse and the blocks 12 of the keys of the second channel's contacts and the keypad 13 address are turned on cells The low level signal from the output Q of the second D-flip-flop 9 of the second channel arrives at the S-input of the first D-flip-flop i of the second channel, sets it to the initial state, and also removes the request signal to interrupt the second channel. The information is similar to the previous case. From the outputs of the device, a Reset signal is received and is received, which translates the second and third D-flip-flops of the second channel to

40

The interrupt request arrived during the processing of the previous interrupt signal.

Claims (1)

Invention Formula A device for controlling switching of contacts, containing the initial setting shaper, reset shaper, shaper Interrupt enabler, load element, inverter, dial contact address group field and control channels each of which contains 50 55 The interrupt request signal, the first and second D-triggers, the key block and the channel address dialing field, the outputs of which are the corresponding address outputs of the device channel, the outputs of the key block are the corresponding information outputs of the device, the inputs of the signal generator 40 The interrupt request arrived during the processing of the previous interrupt signal. Invention Formula A device for controlling switching of contacts, containing the initial setting shaper, reset shaper, shaper Interrupt enabler, load element, inverter, dial contact address group field and control channels, each of which contains shaping0 five The interrupt request signal, the first and second D-triggers, the key block and the channel address dialing field, the outputs of which are the corresponding address outputs of the device channel, the outputs of the key block are the corresponding information outputs of the device, the inputs of the signal generator 5.G .z 73 L ± j-i FI.3