JPH08137516A - Display device for state monitoring - Google Patents

Abstract

PURPOSE: To provide the display device for state monitoring at a low cost by reducing the attachment operation of tools, wiring of cables and outside dimensions of a monitoring panel or the like. CONSTITUTION: This device is provided with a programmable controller 24 for incorporating a first storage means 25 where contact point signals for indicating a monitoring state are converted to bit information data and stored and parallelly sending out the bit information data by every prescribed bit number along with clock signal, an extension unit base 28 for inputting the bit information data, sending them out again, counting the clock signals and generating and sending out plural set signals corresponding to the counted value, plural extension units 30 and 30A for respectively incorporating a second storage means for storing the bit information data from the extension unit base 28 based on the set signals and respectively parallelly sending out the bit information data and plural light emitting diodes 32 and 32A for being operated based on the bit information data from the extension units 30 and 30A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring status display device for displaying the status of equipment, failure, etc. in various processes.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing the configuration of a conventional state monitoring display device. In the figure, 10 is a monitoring status contact for monitoring the status / fault of various processes, and 12 is a monitoring display circuit composed of an annunciator relay or the like. Reference numeral 14 denotes a monitor display lamp, which is installed on the surface of a monitor board or the like.

In the conventional state monitoring display device having the above-described structure, when some state change occurs and the monitoring state contact 10 is opened, the monitoring display circuit 12 displays it. In response to this, the monitor display lamp 14 is turned on by the operation of the annunciator relay or the like.

[0004]

In the conventional display device in the monitoring state as described above, in order to turn on the monitoring display lamps 14, each of the monitoring display lamps 14 has a 1: 1 correspondence. Display circuit 1 for monitoring installed
2 (annunciator relays, etc.) must be activated, and as a result, the number of annunciator relays, etc. installed will increase, and the wiring of signal cables that electrically connect these devices will also be complicated and the number will increase. In addition, there is a problem in that a large amount of work is required for mounting equipment and wiring work for cables, and the external dimensions of the monitoring panel and the like are large, resulting in high cost.

The present invention has been made in order to solve the above-mentioned problems, and it reduces equipment mounting work and cable wiring work, and reduces the outer dimensions of a monitoring panel or the like, thereby reducing the apparatus. It is an object of the present invention to provide a state monitoring display device which can realize the above-mentioned inexpensively.

[0006]

A state monitoring display device according to one aspect of the present invention includes a first storage means for storing a plurality of contact signals indicating a monitoring state, and the stored contact signals. And a second storage means for storing a predetermined predetermined number of contact signals among the contact signals from the control device, respectively, and stores the predetermined predetermined number of stored contact signals. It has a plurality of expansion units that are respectively sent in parallel and a plurality of monitoring indicators that operate based on contact signals from the expansion units.

A state monitoring display device according to another aspect of the present invention includes a first storage means for storing a plurality of contact signals indicating a monitoring state after being converted into bit information data and storing the bit information data. A control device that sends information data in parallel with a clock signal by a predetermined number of bits, and inputs and sends bit information data, and counts clock signals to generate a plurality of set signals corresponding to the count values. An expansion unit base for sending out, and a plurality of expansion units for respectively storing the bit information data from the expansion unit base based on the set signal, and for sending out the stored bit information data in parallel, respectively. , And a plurality of monitoring indicators operating based on the bit information data from the expansion unit.

A status monitoring display device according to still another aspect of the present invention includes a first storage means for storing a plurality of contact signals indicating a monitoring status after being converted into bit information data and stored therein. A programmable controller that sends out bit information data in parallel with a clock signal by a predetermined number of bits, and a first that inputs the bit information data
Connector, a plurality of second connectors respectively connected in parallel to the first connector, and a counter for counting clock signals and outputting a set signal to a predetermined terminal of the second connector corresponding to the count value. The expansion unit base provided, the third connector connected to the second connector, and the third connector connected to the third connector,
Of a latch memory for storing bit information data input via the connector of the set signal based on a set signal, a buffer circuit connected in parallel to the latch memory, a photocoupler connected in parallel to the buffer circuit, and a photocoupler, respectively. A plurality of extension units each having a terminal group connected to the output side and sending out bit information data stored in the latch memory in parallel via the terminal group, and bit units connected to the extension unit terminal group, respectively. A plurality of light emitting diodes that operate based on data.

[0009]

In the state monitoring display device according to one aspect of the present invention, a plurality of contact signals indicating a monitoring state are stored in the first storage means of the control device, and the stored contact signals are paralleled by a predetermined number. Sent to. Second expansion unit
Among the contact signals from the control device, a predetermined number of contact signals corresponding to the unit are stored in the storage means of, and
The stored contact signals are sent out in parallel. The monitoring display operates based on the contact signal from the expansion unit to display the monitoring status.

In a state monitoring display device according to another aspect of the present invention, a plurality of contact signals indicating a monitoring state are converted into bit information data and stored in the first storage means of the control device. The bit information data thus generated is sent out in parallel with the clock signal by a predetermined number of bits. The expansion unit base inputs and sends out the bit information data, counts the clock signal, and generates and sends out a plurality of set signals corresponding to the counted values. Bit information data from the extension unit base is stored in the second storage means of the extension unit based on the set signal, and the stored bit information data is sent out in parallel. The monitor display operates based on the bit information data from the expansion unit to display the monitor status as a lamp.

In a state monitoring display device according to still another aspect of the present invention, a plurality of contact signals indicating a monitoring state are converted into bit information data and stored in the first storage means of the programmable controller, and The stored bit information data is sent in parallel with the clock signal by a predetermined number of bits. Expansion unit base second
The bit information data is input to the connector through the first connector. The counter counts the clock signal and outputs a set signal to a predetermined terminal of the second connector corresponding to the count value. The third connector of the expansion unit is connected to the second connector, so that bit information data is input to the third connector. At this time, when a set signal is input to the corresponding extension unit, bit information data input from the extension unit base via the third connector is stored in the latch memory based on the set signal. Then, the bit information data is transmitted to the terminal group via the buffer circuit and the photo coupler. The light emitting diode connected to the terminal group lights up and displays the monitoring state based on the bit information data.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of a status monitoring display device according to an embodiment of the present invention. In the figure, 1
Reference numeral 0 is a monitoring status contact for monitoring the status / fault in various processes, 22 is a digital input interface unit for inputting the monitoring status contact 10, and this digital input interface unit 22 sets the monitoring status contact 10 to bit information data. Converted to and output. 24
Is a programmable controller for inputting bit information data from the digital input interface unit 22, and the bit information data is stored in a built-in dedicated memory 25. Dedicated output unit 26 is composed of a plurality of transistors which are turned on by receiving an output from programmable controller 24. 28
Is an expansion unit base, and inputs the output of the dedicated output unit 26. 30 and 30A are expansion units,
Memory connected to each expansion unit base 28 and containing the output signal of the dedicated output unit 26 (see FIG. 2)
Once stored in and output. Reference numerals 32 and 32A denote a plurality of light emitting diodes connected to the expansion units 30 and 30A, respectively, and perform lighting operation according to the outputs of the expansion units 30 and 30A.

FIG. 2 is a block diagram showing details of the expansion base unit 28 and the expansion unit 30 of FIG. In the expansion base unit 28, 41 is a connector connected to the dedicated output unit 26. Reference numeral 42 denotes a plurality of connectors connected to the expansion units 30, 30A, ... In this embodiment, ten connectors are provided. Reference numeral 43 is a counter, the output of which is output to a terminal of a predetermined connector of the connectors 42. Reference numeral 44 denotes a waveform shaping circuit, which inputs a reset signal from the programmable controller 24 through the connector 41 and delays the off timing of the signal to generate a wide pulse signal. Further, in the expansion unit 30, 51 is a connector, which is connected to the connector 42a of the expansion base unit 28. 52 and 53 are latch memories, and 54 and 55 are buffer circuits. Reference numerals 56 and 57 are photocouplers, and 58 is a connector, to which the light emitting diode 32 is connected.
The latch memories 52 and 53 each store a 6-bit unit signal, which stores a 12-bit unit signal as a whole, and controls the light emission of the light emitting diode 32.

In the apparatus configured as described above, the digital input interface unit 22 monitors the monitoring status contact 10, converts the monitoring status contact 10 into bit information data (digital signal), and outputs it to the programmable controller 24. Output. Here, the reason why the digital input interface unit 22 converts the state of the monitoring state contact 10 into bit information data and outputs it to the programmable controller 24 is to reduce the number of signal lines. The programmable controller 24 temporarily stores the bit information data from the digital input interface unit 22 in the dedicated memory 25. After that, the programmable controller 24 reads out the bit information data stored in the dedicated memory 25 in units of 12 bits and outputs the bit information data in parallel to the dedicated output unit 30. The subsequent processing is based on FIGS. 3 and 4. The details will be described.

FIG. 3 is a flow chart showing the operation of the display device of FIGS. 1 and 2, and FIG. 4 is an explanatory view schematically showing the operation. Bit information data is stored in units of 12 bits in the dedicated memory 25 of the programmable controller 24. The programmable controller 24 first outputs the 12 bits of bit information data (1 W) and also outputs a clock signal ( S1). These data and the like are sent to the expansion base unit 28 via the dedicated output unit 26. Then, the bit information data of 12 bits is transmitted to the terminal of the connector 42 of the extension base unit 28 via the connector 41. The pulse width of the clock signal is expanded by the waveform shaping circuit 44 and is supplied to the counter 43 as a clock signal, and the counter 43 counts the clock signal. As a result, an output appears at the terminal corresponding to the count value of the counter 43, which is output as a set signal to a predetermined terminal of the corresponding connector 42 (S2). For example, if the clock signal is the first one, a set signal is output to the connector 42a, and it is supplied to the latch memories 52 and 53 of the expansion unit 30 as a set signal and is supplied to the terminal of the connector 42a. Bit information data of bits is fetched and stored (S3).

The programmable controller 24
The above process is repeated each time a clock signal from the expansion unit 30A is input. In the illustrated embodiment, the programmable controller 24 then outputs the next 12 bits of bit information data (2W). Stored in the latch memory of. Programmable controller 2
4 is all bit information data (1 W to
When the output for nW, n = 10) is completed (S4), the reset signal is then output (S5). This reset signal is supplied to the counter 43 of the expansion base unit 28 via the dedicated output unit 26, and the counter 43 is reset and returns to the initial state.

Latch memories 52 and 5 of the expansion unit 30
As described above, the bit information data for 12 bits is stored in 3 and the data is transmitted through the buffer circuits 54 and 55 and the photocouplers 56 and 57 to the light emitting diode 32.
Is controlled to turn on the light emitting diode corresponding to the monitoring status contact 10 that has detected a failure, and a failure display is made. Then, the lighting state is maintained until the contents of the latch memories 52 and 53 are rewritten next, and a failure display is made.

In this embodiment, an example in which up to 10 expansion units can be connected to the expansion unit base 20 has been shown, but in the present invention, the maximum number of expansion units to be connected can be set arbitrarily. it can.

[0019]

As described above, according to one aspect of the present invention, the plurality of contact signals indicating the monitoring state are stored in the first storage means of the control device, and the stored contact signals have a predetermined number. Of the contact signals from the control device are stored in the second storage means of the expansion unit, and a predetermined number of contact signals corresponding to the unit are stored. The stored contact signals are transmitted in parallel. Since the monitoring display operates based on the contact signal from the expansion unit to display the monitoring status, a plurality of contact signals are stored in the storage means, and the group / group control is performed. For this reason, it is no longer necessary to install annunciator relays corresponding to the number of indicators as in the past, and it is possible to reduce the amount of cable wiring between instruments and devices, and to reduce the external appearance of monitoring boards. Law can also be reduced, it can be constructed at low cost equipment.

According to another aspect of the present invention, a plurality of contact signals indicating a monitoring state are converted into bit information data and stored in the first storage means of the control device, and the stored bit information is stored. The data is sent out in parallel with the clock signal by a predetermined number of bits, and the expansion unit base inputs the bit information data and sends it out again, and also counts the clock signals and sets a plurality of set signals corresponding to the counted values. And the bit information data from the expansion unit base is stored in the second storage means of the expansion unit based on the set signal, and the bit information data is sent in parallel to the monitoring display, Since the monitoring display is designed to display the monitoring status based on the bit information data, in addition to the above effects, the contact signal increases and the number of installed monitoring In the case where is also increased, it can be dealt with simply by adding the extension unit, and the effect is obtained that can easily cope with expansion.

According to still another aspect of the present invention, a plurality of contact signals indicating a monitoring state are converted into bit information data and stored in the first storage means of the programmable controller, and the stored. The bit information data is sent in parallel with the clock signal by a predetermined number of bits, the bit information data is input to the second connector of the expansion unit base, the counter counts the clock signal and corresponds to the count value. A set signal is output to a predetermined terminal of the second connector, and bit information data input from the expansion unit base via the third connector is stored in the latch memory of the expansion unit based on the set signal. The information data is transmitted through the terminal group through the buffer circuit and the photo coupler, and the light emission connected to the terminal group. Since the ion is turned on based on the bit information data to display the monitoring state, in addition to the effect according to one aspect of the present invention, the contact signal is increased and the number of monitoring indicators is increased. In such a case, it is possible to deal with the problem by adding an expansion unit and connecting the third connector to the second connector of the expansion unit base, and it is possible to easily cope with the expansion. Has been obtained. Further, since the programmable controller stores the bit information data indicating the monitoring state in the first storage means, it is possible to perform other processing corresponding to the state, and other processing linked with the failure display is also possible. Has become.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a status monitoring display device according to an embodiment of the present invention.

2 is a block diagram showing an embodiment of the expansion unit base and expansion unit of FIG. 1. FIG.

FIG. 3 is a flowchart showing an operation of the status monitoring display device of FIG.

FIG. 4 is an explanatory diagram schematically showing the operation of the state monitoring display device of FIG. 1.

FIG. 5 is a block diagram showing a configuration of a conventional state monitoring display device.

[Explanation of symbols]

10 monitoring status failure contact, 22 digital input interface unit, 24 program controller, 30 dedicated output unit, 34, 34A expansion unit, 38, 38A photocoupler, 40, 40A light emitting diode.

Claims (3)

[Claims] 1. A control device that includes a first storage unit that stores a plurality of contact signals indicating a monitoring state, and sends out the stored contact signals in parallel by a predetermined number, and a contact signal from the control device. A plurality of expansion units that respectively include a second storage unit that stores a corresponding predetermined number of contact signals and send out the stored predetermined number of contact signals in parallel; and contact signals from the expansion units. And a plurality of monitoring indicators that operate based on the above. 2. A first storage means for storing a plurality of contact signals indicating a monitoring state after being converted into bit information data and stored therein, and the stored bit information data are paralleled with a clock signal by a predetermined number of bits. And an expansion unit base for inputting and sending out the bit information data, generating the plurality of set signals corresponding to the count values of the clock signals and outputting the set signals, and the expansion unit base. A plurality of expansion units for respectively storing the bit information data from the storage unit based on the set signal and sending out the stored bit information data in parallel; A status monitoring display device comprising: a plurality of monitoring displays operating based on bit information data. 3. A first storage means for storing a plurality of contact signals indicating a monitoring state after being converted into bit information data and stored therein, and the stored bit information data is paralleled with a clock signal by a predetermined number of bits. To the programmable controller, a first connector for inputting the bit information data, and a plurality of second connectors respectively connected in parallel to the first connector.
Connected to the second connector, and an extension unit base having a counter for counting the clock signal and outputting a set signal to a predetermined terminal of the second connector corresponding to the count value. A third connector, a latch memory connected to the third connector, for storing the bit information data input from the expansion unit base via the third connector based on the set signal, and a latch memory Bit information data stored in the latch memory, each of which includes a buffer circuit connected in parallel, a photocoupler connected in parallel to the buffer circuit, and a terminal group connected to the output side of the photocoupler, respectively. A plurality of expansion units respectively sending out in parallel via the terminal group, and terminals of the expansion unit The respectively connected, the display device status monitoring, characterized in that it comprises a plurality of light emitting diodes operating on the basis of the bit information data.