JPH05313716A - Signal processor - Google Patents

Abstract

PURPOSE:To display data on a liquid crystal display terminal, which is con nected to a programmable controller and displays the operating state of the programmable controller, in real time. CONSTITUTION:The liquid crystal display terminal 41 is provided with an input part 66 from a sensor and an output part 67 to an output device. Arithmetic operation is performed in the liquid crystal display terminal 41 based on the input from the sensor and the operation result is displayed on a display part 69 and an abnormality signal is outputted to the output device through the output part 67, if necessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing device which is connected to a programmable controller and has a display means for displaying information corresponding to the operating state of the programmable controller.

[0002]

2. Description of the Related Art FIG. 14 shows a conventional liquid crystal display terminal 1.
15 is a block diagram showing the electrical configuration of the liquid crystal display terminal 1 and the programmable controller (hereinafter,
It is a figure explaining the connection with 2). As shown in FIG. 15, the PC 2 includes a power supply unit 3, a control unit 4, a communication unit 5, and a plurality of input / output units 6.
It is configured to include. The plurality of input / output units 6 are connected to a plurality of work machines that the PC 2 controls for operation and a plurality of sensors that detect the operating state of the work machines. The liquid crystal terminal 1 described later is connected to the communication unit 5. The control unit 4 controls the inside of the PC 2 based on the electric power supplied from the power supply unit 3, the transmission control of the display data to the liquid crystal display terminal 1 via the communication unit 5, and the signal to the working machine and the sensor via the input / output unit 6. I / O control is performed.

Next, the internal structure of the liquid crystal display terminal 1 will be described. A central processing unit (hereinafter referred to as CPU) 8 to which a clock signal generation circuit 7 is connected, a system read only memory (hereinafter referred to as system ROM) 9, a system random access memory (hereinafter referred to as system RAM)
10, a user random access memory (hereinafter,
A user RAM) 11, a kanji character generator 12, a buffer 13, a parallel input / output circuit 14 realized by a large-scale integrated circuit, and a display control circuit 15 are connected via a data bus 16 and an address bus 17, respectively. .. An address decoder 18 is further connected to the address bus 17. Address decoder 1
8 is connected to the parallel input / output circuit 14, and is also connected to the system ROM 9 and the system R via the address bus 19.
It is connected to the AM 10, the user RAM 11, the Kanji character generator 12, the buffer 13, and the display control circuit 15.

The CPU 8 controls the inside of the liquid crystal display terminal 1 and controls the transmission and reception of signals with the PC 2. A control program for the CPU 8 is stored in the system ROM 9, and a signal transmitted from the PC 2 and a signal transmitted from the liquid crystal display terminal 1 are stored in the system RAM 10. The user RAM 11 stores the screens described later, and the Kanji character generator 12
Stores character data that can be used for display. The address decoder 18 designates a circuit to be read or written by the CPU 8 based on an instruction from the CPU 8.

A memory card 20 is connected to the buffer 13. The memory card 20 can store and save the contents stored in the user RAM 11.

A key input unit 21 and a buzzer 22 are connected to the parallel input / output circuit 14. Key input part 2
Display selection of the liquid crystal display terminal 1 and the like can be performed from 1, and the buzzer 22 sounds by operating the key input unit 21, and an error sound is also emitted from the buzzer 22 when an error operation is performed. ..

The display control circuit 15 is connected to a display random access memory (hereinafter referred to as a display RAM) 23 and a display section 24 realized by a liquid crystal display device or the like. The display RAM 23 stores display data corresponding to the display command transmitted from the CPU 8 to the display control circuit 15. The display control circuit 15 reads the display data corresponding to the command from the CPU 8 from the display RAM 23. ,
The display on the display unit 24 is controlled.

The CPU 8 has a communication interface 2
5 is connected, and the liquid crystal display terminal 1 is connected to the PC 2 via the communication interface 25. P
Data relating to the display of the liquid crystal display terminal 1 is input from C2 via the communication interface 25. The above-mentioned display-related data is data for displaying the number of products produced and the production status, and the CPU 8 can perform display on the display unit 24 by executing this data. Through the communication interface 25, the liquid crystal display terminal 1 can read out the number of parts stored in the PC 2 and the planned production quantity.

A power supply unit 26 is provided inside the liquid crystal display terminal 1.
Is installed. For example, a power supply of 100 V is externally introduced to the power supply unit 26, is connected to the ground potential, outputs a voltage of 5 V used for signal input / output, and outputs a voltage for controlling the display unit 24. To be done. CPU 8, system RAM 10 and user RAM
A peripheral circuit 27 is connected to 11. Peripheral circuit 27
C when the power supply from the power supply unit 26 is stopped.
A circuit for stopping the CPU 8, the system RAM 10 and the user RAM 11 so that the PU 8 does not malfunction.
A battery or the like is provided so that the internal memory contents are not erased as the voltage drops. As a result, the contents stored in the system RAM 10 and the user RAM 11 are saved even if the supply of the voltage from the power supply unit 26 is stopped.

FIG. 16 is a block diagram for explaining the operation inside the PC 2. A signal processing unit 28 is provided inside the PC 2, the signal processing unit 28 is connected to the sensor via the input / output unit 6 of the PC 2, and the first arithmetic unit 29 a and the second arithmetic unit of the arithmetic unit 29. It is connected to the part 29b. The first calculation unit 29a is the liquid crystal display terminal 1
Is connected to the display data output unit 31 for transmitting to the PC 2, and the second arithmetic unit 29b causes the PC 2 to input / output unit 6
Is connected to a drive control unit 32 that is connected to a work machine that is performing operation control.

The signal input from the sensor to the signal processing unit 28 is calculated by the first calculation unit 29a, and then the display data is transmitted to the liquid crystal display terminal 1 via the display data output unit 31. The work machine connected to the PC 2 via the input / output unit 6 is the second computing unit 29b.
The operation is performed based on the operation data output from the drive control unit 32 according to the calculation of. Further, the operation state of the work machine is output to the second calculation unit 29b via the drive control unit 32, and the second calculation unit 29b also outputs the operation data to the work machine based on this data.

Among the signals input from the sensor to the signal processing unit 28, the one indicating an abnormality is transmitted to the second arithmetic unit 29b, and a signal for stopping the working machine or the like is output via the drive control unit 32. It

[0013]

As described above, the liquid crystal display terminal 1 displays the screen, characters,
Displayed by numerical data. These data are calculated or secured in the PC 2, and the liquid crystal display terminal 2 can display the data only by executing them.

As described above, the liquid crystal display terminal 1 is connected to the PC 2
Since it has only a function of simply displaying the data sent from the computer, there is a problem that the calculation items inside the PC 2 increase and the program inside the PC 2 is complicated. Further, since the output from the sensor is processed in the PC 2 and then transmitted to the liquid crystal display terminal 1, it takes time for data processing in the PC 2 and the PC 2 transmits only to the liquid crystal display terminal. Instead of transmitting the signal to the liquid crystal display terminal 1 in parallel with the control of other working machines, it takes time to process the signal input from the sensor and transmit it to the liquid crystal display terminal 1. There is a problem that the display of the display terminal 1 lacks in real time.

An object of the present invention is to provide a signal processing device which is provided with a display control means inside the signal processing device and can immediately process and display a detection signal detected by the input / output means.

[0016]

SUMMARY OF THE INVENTION The present invention relates to a signal processing apparatus which is connected to a programmable controller and which provides a display corresponding to the operating state of the programmable controller, in an operating device driven by the control of the programmable controller. With respect to the input / output means to which the operating state detecting means for outputting the detection signal for detecting the operating state of the operating device is provided, which is provided in association with the input / output means, and the detection signal via the input / output means A signal processing apparatus, comprising: a display control unit that performs signal processing and displays the signal on a display unit based on the content of the signal.

[0017]

According to the present invention, in the signal processing device which is connected to the programmable controller and the display means performs a display corresponding to the operating state of the programmable controller, the input / output means is controlled by the programmable controller. An operating state detection means, which is provided in association with the driven operating device and outputs a detection signal for detecting the operating state of the operating device, is connected, the detection signal is input, and the display control means passes through the input / output means. Signal processing is performed on the detection signal, and the signal is displayed by the display means based on the content of the signal. Thereby, the detection signal is subjected to signal processing by the display control means without passing through the programmable controller and displayed on the display means. Since the processing of the detection signal is performed by the display control means inside the signal processing device, it takes a long time to process the signals from other operating devices at the same time when it is processed inside the programmable controller. The display control means inside the liquid crystal display device processes only the detection signal.

[0018]

1 is a block diagram showing the electrical construction of a liquid crystal display terminal 41 according to an embodiment of the present invention, and FIGS. 2 and 3 are a liquid crystal display terminal 41 and a programmable controller (hereinafter referred to as a PC). It is a figure which shows the connection with 42. As shown in FIG. 2, the PC 42 includes a power supply unit 43, a control unit 44, and a communication unit 45.
And a plurality of input / output units 46. A liquid crystal display terminal 41 is connected to the communication unit 45, and a PC is connected to the plurality of input / output units 46.
A plurality of work machines 42 are connected to control the operation. A plurality of sensors 47 and a plurality of output devices 48 are connected to the liquid crystal display terminal 41.

The control unit 44 of the PC 42 controls the inside of the PC 42 based on the electric power supplied from the power supply unit 43 and also controls the work machine via the input / output unit 46. The liquid crystal display terminal 41 receives data such as production status from a plurality of sensors 47 such as proximity switches, micro switches and limit switches, and the liquid crystal display terminal outputs data such as solenoid valve and relay based on the input data. A signal can be output to the device 48.

The PC 42 can read a signal from the sensor 47 managed by the liquid crystal display terminal 41 via the communication unit 45.

As shown in FIG. 3, it is possible to connect a plurality of liquid crystal display terminals 41 to one PC 42. At this time, the PC 42 reads out data such as production status from the plurality of liquid crystal display terminals 41, for example, once a day by reading out data from the liquid crystal display terminal 41 to collect daily reports, weekly reports, monthly reports and the like. Or you can output these from a printer. In addition, production control and process control can be performed based on these.

In this embodiment, the liquid crystal display terminal 41 is connected to the PC 42, and the above-mentioned production pipeline and process control are carried out by the PC.
Although it is performed by 42, the liquid crystal display terminal 41 is not limited to the PC 42, and the liquid crystal display terminal 41 may be connected as a host to a personal computer or the like, and production management or the like may be performed using the personal computer.

Next, the internal structure of the liquid crystal display terminal 41 will be described. A central processing unit (hereinafter, referred to as CPU) 50 to which a clock generation circuit 49 is connected is a system read-only memory (hereinafter, referred to as system ROM) 5
1, system random access memory (hereinafter referred to as system RAM) 52, user random access memory (hereinafter referred to as user RAM) 53, kanji character generator 54, buffer 55, parallel input / output realized by a large scale integrated circuit, etc. The circuits 56 and 57 and the display control circuit 58 are connected via a data bus 59 and an address bus 60, respectively. The address bus 60 is also connected to the address decoder 61, which includes the system ROM 51 and the system RAM 5.
2, user RAM 53, Kanji character generator 5
4, the buffer 55, the display control circuit 58, and the parallel input / output circuits 56 and 57. The buffer 55 is connected to the memory card 63.

The parallel input / output circuit 56 has a key input section 6
4 and the buzzer 65 are connected, and the parallel input / output circuit 57 is connected to the input unit 6 connected to the sensor 47.
6 and the output unit 67 connected to the output device 48 described above. The display control circuit 58 is connected to a display random access memory (hereinafter, referred to as a display RAM) 68 and a display unit 69 realized by a liquid crystal display device or the like. Further, the CPU 50 has a communication interface 70
, And the liquid crystal display terminal 41 is connected to the PC 42 via the communication interface 70.

The liquid crystal display terminal 41 has a power supply 7
1, a power source 71 is connected to a power source such as 100 V from the outside and is also connected to an installation potential, and controls the voltage of 5 V used for signal input / output and the display unit 69. The voltage is output. CPU5
0, the system RAM 52 and the user RAM 53 are connected to the peripheral circuit 72.

The CPU 50 controls the inside of the liquid crystal display terminal 41 and controls the transmission and reception of signals with the PC 2. The system ROM 51 stores a control program for the CPU 50, the system RAM 52 stores data such as the production status and the number of parts, and the input data from the sensor 47 and the output data to the output device 48. Transmission / reception data with the PC 42 is stored.

The user RAM 53 stores screens, which will be described later, and the Kanji character generator 54 stores character data that can be used for display. The address decoder 61 uses the CPU 5 based on an instruction from the CPU 50.
0 designates a circuit for reading and writing. The memory card 63 stores the contents stored in the user RAM 53,
Can be saved.

From the key input section 64 connected to the parallel input / output circuit 56, the operation relating to the display of the liquid crystal display terminal 41 and the data relating to the memory inside the liquid crystal display terminal 41 are inputted, and the key input to the buzzer 65 is made. The alarm is sounded when the operation is performed, and an alarm sound is emitted when an abnormality occurs in the liquid crystal display terminal 41.

The parallel input / output circuit 57 temporarily stores the data input from the above-mentioned sensor 47 via the input unit 66 realized by a photocoupler or the like, and the output unit 67 realized by the photocoupler or the like. The data output from the output device 48 to the output device 48 is temporarily stored.

A display RA connected to the display control circuit 58.
Display data corresponding to the display command transmitted from the CPU 50 to the display control circuit 58 is stored in the M68,
The display control circuit 58 reads the display data corresponding to the instruction from the CPU 50 from the display RAM 68, and displays the display portion 69.
Control the display of.

Although the power source unit 71 is installed in the liquid crystal display terminal 41 as described above, if the supply of the voltage from the power source unit 71 is stopped due to some condition, the peripheral circuit 72 prevents the CPU 50 from malfunctioning. To prevent this, the operation of the CPU 50 is stopped, a voltage is supplied to the system RAM 52 and the user RAM 53, and the stored contents inside the system RAM 52 and the user RAM 53 are saved.

FIG. 4 is a diagram for explaining the operation inside the PC 42. The calculation unit 73 inside the PC 42 includes a first calculation unit 73.
a and the second calculation unit 73b are provided. A data input / output unit 75 for inputting / outputting data to / from the liquid crystal display terminal 41 is connected to the first arithmetic unit 73a.
The drive control unit 7 that transmits / receives drive control data to / from a plurality of work machines connected to the PC 42 is included in the arithmetic unit 73b.
6 is connected.

Inside the PC 42, drive data based on the calculation result calculated by the second calculation section 73b for controlling the plurality of connected work machines is output to the work machine via the drive control section 76. In addition, the data output from the work machine is input to the second calculation unit 73b via the drive control unit 76, and the second calculation unit 73b also outputs the drive control data to the drive control unit 76 based on the data. Send. The first arithmetic unit 73a reads data from the liquid crystal display terminal 41 via the data input / output unit 75 when the PC 42 reads data from the liquid crystal display terminal 41 and manages data such as daily reports and weekly reports. When some data in the PC 42 is read from the display terminal 41, the read data is transmitted via the data input / output unit 75.

As described above, although data is constantly transmitted and received to and from the work machine inside the PC 42,
Communication with the liquid crystal display terminal is performed only when necessary, and it is not necessary to always perform transmission / reception with respect to the liquid crystal display terminal 41 as in the conventional case, and the PC 42 only needs to calculate drive data of the working machine.

FIG. 5 is an example of a flowchart for explaining an operation example of the liquid crystal display terminal 41 shown in FIG. In step a1, the parallel input / output circuits 14, 25
Then, the system RAM 10 and the like are initialized, and in step a2, it is determined whether or not the local mode for displaying is designated based on the input from the sensor 47 at power-on. If the local mode is designated, step a3 is selected. Is set to the online mode, and if not specified, the process proceeds to step a4.

At step a4, the main menu is displayed. In the main menu, the above online mode or the local mode in which the stored contents in the liquid crystal display terminal 41 can be read or changed can be set. In step a5, it is determined whether or not the online mode is specified. If the online mode is specified, the process proceeds to step a3, and if the local mode is specified, the process proceeds to step a6.

At step a6, the local mode is displayed. As the local mode, it is possible to select any of the five modes of transfer, system, screen, external character and memory. When the transfer mode is selected in step a6, the process proceeds to step a7, and data can be transmitted / received to / from the PC 2. When the system mode is selected in step a6, the process proceeds to step a8, and the program contents stored in the system ROM 12 can be read out. When the screen mode is selected in step a6, the process proceeds to step a9, and the user RAM 53
The screen stored in the memory card 63 can be read or modified, or a new screen can be created.

When the external character mode is selected in step a6, the process proceeds to step a10, and characters and figures which are not stored in the memory such as the kanji character generator 54 can be created and stored. When the memory mode is selected in step a6, the process proceeds to step a11, and the created screen or the like can be stored in the memory mode 26.

FIG. 6 is a view showing the screen display file 77 stored in the user RAM 53. The screen file 77 describes the display position of the display that can be displayed on the screen corresponding to each screen number. For example, the display position A (X1, Y1) of the screen number "100" has an initial value of "1".
It is shown that the input address is "001", the abnormal setting value is "10", and the output address is "002". The initial value of the display position B (X2, Y2) is "20.
00 ”, the input address is“ 002 ”, the abnormal setting value is“ 100 ”, and the output address is“ 003 ”. The initial value of the display position C (X3, Y3) is "3000", the input address is "005", and the abnormal setting value is "5".
The output address is “0” and the output address is “001”.

The input address is an address to which a signal from the sensor that changes each display number is input.
The output address is an output address of the output device when outputting to the output device 48 when each value reaches the abnormal set value.

FIG. 7 is a diagram showing a display example of the screen number "100". In the upper left corner, for example, the screen number "100" is shown, the display position A shows the initial value "1500", the display position B shows "2000", and the display position C shows "3000". Is displayed. It can be seen on the display screen that these are the planned production numbers for Units 1, 2 and 4.

FIG. 8 is a diagram showing a display example when the designated number is inputted in advance in the system ROM 51. FIG. 8 (1) shows a screen for selecting the setting of the production quantity.
(2) shows a display example when setting the production quantity, and FIG. 8 (3) shows a display example during operation.

In FIG. 8 (1), under the message "Please select a work", three items of "production number setting from host", "manual production number setting", and "operation" are selected. be able to. If you select "Set production quantity from host", the planned value of production quantity is input from the connected PC 42, and if you select "Manual production quantity setting", set the production quantity using the liquid crystal display terminal 41. If the user selects "Run", the liquid crystal display terminal 41 operates.

FIG. 8 (2) shows an example of a display screen when the "production quantity setting from host" or "manual production quantity setting" is selected. On this screen, the set value corresponding to each machine is shown.

FIG. 8 (3) shows a display example when "driving" is selected in FIG. 8 (1). For example, in the n-th machine, the planned production number is 10, the current production number is 50, the achievement rate is 50%, and it is shown that three defective products have occurred.

FIG. 9 is an example of a flow chart for explaining the operation when calculating the remaining production quantity. Step b
In 1, the preset production quantity is read from the user RAM 53, and in step b2, it is determined whether or not an input pulse indicating that new production has been performed is detected. In step b2, there is a waiting period until an input pulse is detected. If an input pulse is detected, "1" is subtracted from the planned production quantity in step b3, and it is displayed in the planned production quantity calculated in step b3 in step b4. Is rewritten and the process returns to step b1.

FIG. 10 is a diagram showing a display example when the online mode for displaying based on the input from the sensor 47 is selected. FIG. 10 (1) shows an example of the menu in the online mode of Unit 2, for example, FIG. 10 (2) shows a display example of the tact time, and FIG. 10 (3) shows parts used for production. A display example showing the remaining number of is shown.

In FIG. 10 (1), as the online main menu of the No. 2 machine, "tact time display" for obtaining the average time required for production of one unit and how many parts are left for production are shown. "Parts status",
It is shown that it is possible to select one of the "defective product statuses" that indicates how many defective products have been produced.

In FIG. 10 (2), the tact time is 100.
It is shown that it is 50 seconds, and in FIG. 10 (3),
As for the parts status, the remaining number of parts of the No. 2 machine is 10, and a message indicating that replenishment is necessary is shown.

FIG. 11 is an example of a flowchart for explaining the step of displaying the tact time shown in FIG. 10 (2). In step c1, it is determined whether or not an input pulse indicating that a product has been produced is input from the sensor 47, and the process waits in step c1 until the input pulse is detected. If the input pulse is detected in step c1, the timer is started in step c2. In step c3, 1 is added to the counter, and in step c4 the counter is incremented by 1.
It is determined whether or not it has become zero. If the counter is less than 10 in step c4, the process proceeds to step c5, waits in step c5 until the next input pulse is detected, and then returns to step c3 when the input pulse is detected.

If it is determined in step c4 that the counter has reached 10, the timer is stopped in step c6. In step c7, the elapsed time is read from the timer stopped in step c6 and the elapsed time is stored in the system RAM 52. In step c8, the elapsed time is divided by 10,
After the average value is calculated, the average value is displayed on the display unit 69. In step c9, the timer, the counter, and the storage unit for the elapsed time are cleared, and the process returns to step c1.

FIG. 12 is an example of a flowchart for explaining the step of displaying the parts status and its warning shown in FIG. 10 (3). In step d1, the remaining number of components is read from the system RAM 52. In step d2, it is determined whether or not an input pulse indicating the use of the component has been detected, and the process waits in step d2 until the input pulse is detected. When the input pulse is detected in step d2, 1 is subtracted from the remaining number of parts in step d3.

In step d4, the number of remaining parts is compared with the number of alarms stored in advance in the system RAM 52. If the number of remaining parts is larger than the number of alarms, the process returns to step d2, and if the number of parts becomes smaller than the number of alarms. An alarm is output in step d5. As an example of the alarm display in step d5, a message indicating that the parts are replenished can be displayed as shown in FIG.

FIG. 13 is a diagram showing a display example when an abnormality occurs. FIG. 13 (1) shows an example of a message indicating that an abnormality has occurred, and FIG. 13 (2) shows the action corresponding to the occurrence of the abnormality.
3 (3) shows the operation after the treatment is completed.

In FIG. 13 (1), a message indicating that abnormal overheating has occurred and an emergency stop has been displayed. It is also shown that the key f1 may be pressed to display the repair method.

FIG. 13B shows the above-mentioned repair method. As a method of restoration, the current temperature and the upper and lower limits of the allowable temperature of the device in which the abnormality has occurred are shown together with the message "please cool to the indicated temperature". In FIG. 13C, a message indicating that the operation may be restarted is displayed because the temperature of the working machine in which the abnormality has occurred is within the allowable range, and the start switch may be pressed to restart the operation. Has been shown.

As described above, according to this embodiment, the sensor 4
Direct input from 7 to the liquid crystal display terminal 41, the liquid crystal display terminal 41 performs calculation based on the data and outputs the display. Further, as a result of performing the calculation based on the signal from the sensor 47, when the abnormality alarm must be output, or when the abnormality signal is transmitted from the sensor 47, the liquid crystal display terminal 41 directly outputs the output device 48. The operation control corresponding to the abnormal signal can be performed. Unlike the conventional case, the signal output from the sensor 47 is not processed by the programmable controller 42 and sent to the liquid crystal display terminal 41, and the control signal of the liquid crystal display terminal 41 conventionally provided inside the programmable controller 41 is transmitted. A program for transmitting is unnecessary, the program inside the PC 42 is simplified, and the program inside the PC 42 can be easily created.

Further, since the signal from the sensor 47 is input to the liquid crystal display terminal 41 without passing through the PC 42, the display performed on the liquid crystal display terminal 41 and the abnormality alarm when an abnormality occurs can be performed more quickly than in the conventional case. It can be carried out.

[0059]

According to the present invention, in the signal processing device which is connected to the programmable controller and the display means performs display corresponding to the operating state of the programmable controller, the input means controls the programmable controller. Connected to an operating state detecting means for outputting a detection signal for detecting an operating state of the operating device, the detection signal is input, and the display control means is operated via the input means. Signal processing is performed on the detection signal, and the signal is displayed by the display means based on the content of the signal. Thereby, the detection signal is subjected to signal processing by the display control means without passing through the programmable controller and displayed on the display means. Since the processing of the detection signal is performed by the display control means inside the signal processing device, it takes a long time to process the signals from other operating devices at the same time when it is processed inside the programmable controller. The display control means inside the liquid crystal display device only needs to process the detection signal, the processing time is shortened, and the display can be performed in real time.

[Brief description of drawings]

FIG. 1 is a liquid crystal display terminal 4 which is an embodiment of the present invention.
It is a block diagram which shows the electric constitution of 1.

FIG. 2 is a diagram showing a connection between a liquid crystal display terminal 41 and a programmable controller 42.

FIG. 3 is a diagram showing a connection between a liquid crystal display terminal 41 and a programmable controller 42.

FIG. 4 is a diagram illustrating an internal operation of the programmable controller 42.

FIG. 5 is a liquid crystal display terminal 4 which is an embodiment of the present invention.
3 is an example of a flowchart showing an operation example of No. 1.

6 is a diagram showing a screen display file 77 stored in a user read only memory 53. FIG.

7 is a diagram showing a display example executed on a display unit 69 based on the screen display file 77 shown in FIG.

FIG. 8 is a diagram showing a display example when a display is performed using the system mode.

FIG. 9 is an example of a flowchart illustrating a process of displaying the remaining production schedule.

FIG. 10 is a diagram showing a display example in an online mode.

FIG. 11 is an example of a flowchart illustrating a process of displaying tact time.

FIG. 12 is an example of a flowchart for explaining a process of calculating the remaining number of parts and outputting an alarm if necessary.

FIG. 13 is a diagram showing a display example when a signal indicating an abnormality is input from the sensor 47.

FIG. 14 is a block diagram showing an electrical configuration of a conventional liquid crystal display terminal 1.

FIG. 15 is a diagram showing a connection between a liquid crystal display terminal 1 and a programmable controller 2.

FIG. 16 is a diagram illustrating an internal operation of the programmable controller 2.

[Explanation of symbols]

 41 liquid crystal display terminal 42 programmable controller 47 sensor 50 central processing unit 58 display control circuit 69 display unit

Claims (1)

[Claims] 1. A signal processing device, comprising a display means connected to a programmable controller and performing a display corresponding to an operating state of the programmable controller, wherein the signal processing device is provided in association with an operating device driven by control of the programmable controller. The operation state detecting means for outputting a detection signal for detecting the operation state of is connected to the input / output means to which the detection signal is input, and the detection signal via the input / output means is subjected to signal processing to obtain a signal content. And a display control means for displaying the signal on a display means based on the signal processing apparatus.