JPH03116304A - Production line trouble restoring device - Google Patents

Abstract

PURPOSE:To quickly restore an equipment to the state, in which the sequence control is properly performed, with an easy operation by providing an operation step gradually advancing means. CONSTITUTION:An operation element specifying means specifies operating elements, which should be operated to successively advance respective operation steps to a recoverable operation step from an operation step in the middle of the trouble operation block specified by a trouble operation block specifying means, and an operation element which operate these operating element. An operation element display means displays this specified operation element in the operatable state. An operation step gradually advancing means successively advances operation steps at each time of operation of the operating element to arrive at the recoverable operation step in the trouble operation block. Thus, the equipment is quickly restored to the state in which the sequence control is properly performed.

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention provides a method for detecting a malfunction when a malfunction occurs in the equipment in a production line where the operation of the equipment is subject to sequence control. The present invention relates to a production line failure recovery device that restores equipment to a state in which sequence control of its operations is properly performed when the cause is eliminated.

(Prior Art) In a production line such as an automobile assembly line, a sequence control unit with a built-in computer is provided for the various installed equipment, and the sequence control unit controls the operations that each equipment should perform in sequence. It is known that sequence control is performed. When such sequence control is performed, a sequence control program is loaded into a computer built into the sequence control unit, and the sequence control unit controls each stage of operation control for each of the various equipment installed on the production line. , and shall proceed sequentially according to a sequence control program.

When sequence control is performed on the operation of various equipment installed on a production line, fault diagnosis is performed in parallel to the sequence control to monitor the control status and detect failures in each equipment. It is often done like this. Fault diagnosis related to sequence control is said to take various forms. For example, Japanese Patent Application Laid-Open No. 60238906 describes a sequence control circuit unit under a condition in which equipment is to be operated normally. The operating states of the components of the sequence control circuit section are set as the reference state, and the operating states of the components of the sequence control circuit section are sequentially compared with the reference state during the actual operation of the equipment, and abnormalities are detected based on the differences. This has been proposed as one of the fault diagnostics related to sequence control.

(Problems to be Solved by the Invention) As described above, in a situation where sequence control of the operations of various equipment installed on a production line is performed together with failure diagnosis, it is difficult to detect equipment failure through failure diagnosis. When a failure occurs, it is desirable to eliminate the cause of the detected failure and quickly restore the equipment to a state in which sequence control of its operations can be properly performed with easy operations.
In the past, it cannot be said that the return of equipment to a sequence control state after a failure of the equipment is detected through failure diagnosis has been performed as desired.

In view of this, the present invention divides various actions to be performed into a plurality of action blocks, with the maximum unit of a series of actions that are performed independently from start to finish under normal conditions as an action block. In addition, each of the plurality of action blocks is divided into a plurality of action steps, and sequence control is performed to sequentially execute the plurality of action steps in each of the plurality of action blocks in a preset order. Focusing on equipment in a production line, when a failure occurs in such equipment, after the cause of the failure is eliminated, sequence control of the equipment's operation can be properly performed quickly and easily. It is an object of the present invention to provide a production line failure recovery device capable of recovering the state.

(Means and operations for solving the problem) In order to achieve the above-mentioned object, the production line failure recovery device according to the present invention, as shown in the basic configuration in FIG. The maximum unit of a series of actions that is performed independently from start to finish under normal conditions is divided into multiple action blocks, and each of the multiple action blocks is divided into multiple actions. When a failure occurs in equipment that is sequence-controlled to sequentially execute multiple operation steps in each of multiple operation blocks in a preset order under the classification of steps, the operation that caused the failure When an element is repaired, a means for identifying a motion block that is stopped at an intermediate motion step without reaching a restorable motion step as a failed motion block; and The actuation element to be operated in order to sequentially advance each of the movement steps up to the returnable movement step is specified for each of the movement steps from the intermediate movement step to the returnable movement step, and further, the actuation element to be operated is specified. An operation element specifying means for specifying an operation element to be operated in order to actuate the element; and an operation element specifying means for displaying the operation element to be operated specified by the operation element specifying means in an operable state; An operating element display means that causes the operating element to be activated to be activated when the operating element is operated, and a means for displaying an operating element that causes the operating element to be activated to be activated, and a means for displaying the operating element from the above-mentioned intermediate operational step to the reversible operational step each time the operational element that is to be activated is activated. an operation step progression means for sequentially advancing each of the operation steps and bringing the failed operation block into a state where it has reached a recoverable operation step; and when the failed operation block has reached a state where it has reached a recoverable operation step;
It is configured with a restart means for restarting the sequence and control of the equipment.

With this configuration, it can be applied to equipment that is sequence-controlled to sequentially execute a plurality of operation steps in each of a plurality of operation blocks in a preset order, and when a failure occurs in the equipment. When put into operation, after the operating element that caused the failure has been repaired, the equipment is quickly returned to a state in which the sequence control of its operation is properly performed, and as a result, the production line is improved. Damage caused by stagnation will be reduced.

(Example) Before explaining the production line failure recovery device according to the present invention, an example of a vehicle assembly line to which the production line failure recovery device according to the present invention is applied will be explained with reference to FIGS. 2 and 3. state

In the vehicle assembly line shown in FIGS. 2 and 3, a positioning station receives the vehicle body 11 on a pedestal 12, controls the position of the pedestal 12, and positions the body 11 on the pedestal 12. STI and the engine 14 which was placed in place on the pallet 13. A docking station ST2 that combines the front suspension assembly (not shown) and the rear suspension assembly 15 with the body 11, and an engine 14 that is combined with the body 11. A fastening station ST3 is provided for fastening and fixing the front suspension assembly and the rear suspension assembly 15 using screws. Further, an overhead transfer device 16 for holding and transporting the body 11 is provided between the positioning station STI and the docking station ST2, and an overhead transfer device 16 is provided between the docking station ST2 and the fastening station ST3. is provided with a pallet conveying device 17 for conveying pallets 13.

The pedestal 12 in the positioning station STI is configured to reciprocate along the rail 18, and although not shown in the figure, the pedestal 12 in the positioning station STI is arranged in relation to the pedestal 12. The pedestal 12 is moved in the direction perpendicular to the rail 18 (vehicle width direction) and the direction along the rail 18 (front-rear direction), and the front part of the body 11 placed on the pedestal 12 is measured in the vehicle width direction. positioning means (BF) for positioning at the rear of the vehicle, positioning means (BR) for positioning the rear part in the vehicle width direction, and positioning means (TL for positioning in the longitudinal direction)
), and further includes lifting reference pins (FL, FR, RL,
RR) is provided. Then, by these positioning means and the lifting reference pin, the positioning station S
A positioning device 19 at the TI is configured.

The transfer device 16 includes a guide rail 20 disposed above the positioning station STI and the docking station ST2 with a hook passing between them;
The body 11 is supported by the lift hanger frame 22, and the carrier 21 is attached to the lift hanger frame 22. Further, the pallet conveying device 17 includes a large number of support rollers 2 each receiving the lower surface of the pallet 13.
A pair of guide parts 24L and 24R provided with a pallet 13 and a pair of transport rails 25L and 25R1 extending parallel to the guide parts 24L and 24R, respectively, each have a pallet locking part 26 that locks the pallet 13, Each transport rail 25L
and 25R, and a near motor mechanism (not shown) for driving the pallet conveyors 27L and 27R.

At the docking station ST2, when assembling the front suspension assembly and the rear suspension assembly 15, there is a pair of left and right front sections that support the struts in the front suspension assembly and the struts 15A in the rear suspension assembly 15, respectively, to take an assembly posture. Clamp arms 30L and 30R1 and a pair of left and right rear clamp arms 31L and 31R are provided. The left and right front clamp arms 30L and 30R are attached to the mounting plates 32L and 32R, respectively, so as to be movable forward and backward in a direction orthogonal to the transport rails 25L and 25R, and the left and right rear clamp arms 31L and 3
1R are attached to the mounting plate parts 33L and 33R, respectively, so as to be movable forward and backward in a direction perpendicular to the transport rails 25L and 25R, and left and right front clamp arms 30L
and 30R, and the mutually opposing tips of the left and right rear clamp arms 31L and 34R, respectively.
Strut in front suspension assembly or strut 15 in rear suspension assembly L5
It has an engaging portion that engages with A. The mounting plate portion 32L is movable relative to the fixed base 35L by the arm slide 34L in the direction along the transport rails 25L and 25R, and the mounting plate portion 32R is movable relative to the fixed base 35R by the arm slide 34R. Transport rail 2
The mounting plate portion 33L is movable in the direction along the transport rails 25L and 25R with respect to the fixed base 37L by the arm slide 36L, and the mounting plate portion 33R is movable in the direction along the transport rails 25L and 25R. The transfer rail 25 is moved against the fixed base 37R by the arm slide 36R.
It is movable in directions along L and 25R. Therefore, the left and right front clamp arms 30L and 30R are movable back and forth and left and right with their tips engaged with the struts in the front suspension assembly.
1L and 31R are movable back and forth and left and right when their tips are engaged with the strut 15A of the rear suspension assembly 15, and the left and right front clamp arms 30L and 30R, and the arm slide 34L. and 34R9 left and right rear clamp arms 31L and 31R1 and arm slides 36L and 36R constitute a docking device 40.

Furthermore, the docking station ST2 includes a pair of slide rails 41L and 41R installed to extend parallel to the transport rails 25L and 25R, respectively, and a movable slide rail that is configured to slide along the slide rails 41L and 41R. A slide device 45 is provided, which includes a member 42, a motor 43 for driving the movable member 42, and the like. Retaining means 46 are provided for engaging the cylindrical member 40 (which is attached to the holder 46). Furthermore, two elevating pallet reference pins 47 are provided to position the pallet 13 at a predetermined position. The slide device 45 includes the body 11 supported by the lift hanger frame 22 in the transfer device 16.
, an engine 14 arranged on a pallet 13. When the front suspension assembly and the rear suspension assembly 15 are combined, the retaining means 46 thereof is moved back and forth while engaging with the movable engine support member on the pallet 13 positioned by the lifting pallet reference bin 47;
Thereby, the engine 14 is moved back and forth with respect to the body 11 to avoid interference between the body 11 and the engine 14.

The fastening station ST3 includes a robot 48A that tightens screws to fasten the engine 14 and front suspension assembly assembled to the body 11, and a robot 48A that tightens screws to fasten the engine 14 and front suspension assembly assembled to the body 11. A robot 48B is installed to carry out screw tightening work for fastening, and also to position the pallet 13 at a predetermined position at the fastening station ST3.
Two lifting pallet reference pins 47 are provided.

In the vehicle assembly line as described above, the positioning device 19 and the transfer device 16 at the positioning station STI
．． Docking device 40 and sliding device 45° pallet conveying device 17 at docking station ST2,
And robot 48A at fastening station ST3
and 48B are equipment (sequence control target equipment) whose operations are subjected to sequence control based on a sequence control program by a sequence control unit connected to them.

The operations performed by each of these sequence control target equipment are as follows:
When divided into action blocks defined as the maximum unit of a series of actions that can be performed independently from start to finish, 12 action blocks of BO-Bll are obtained as follows.

BO: Operation block for positioning the body 1 on the pedestal 12 by the positioning device 19 (pedestal positioning operation block).

B1: Operation block for preparing for transfer of the body 11 by the transfer device 16 (transfer device preparation operation block)
.

B2: An operation block in which the docking device 40 prepares to clamp the struts of the front suspension assembly with the left and right front clamp arms 30L and 30R, and to clamp the struts 15A of the rear suspension assembly 15 with the left and right rear clamp arms 31L and SIR ( Strut clamp preparation movement block).

B3: Operation block in which the body 11 on the pedestal 12, which has been positioned by the positioning device 19, is transferred to the lifting hanger frame 22 in the transfer device 16 and transported (transfer device receiving operation) block).

Operation block (
Slide device preparation operation block).

B5: Operation block for returning the cradle 12 to its original position by the positioning device 19 (cradle original position return operation block).

B6: Lifting hanger frame 22 in transfer device 16
The engine 14 is placed on a pallet 13, the struts of the front suspension assembly are placed on the pallet 13, and are clamped by the left and right front clamp arms 30L and 30R, and the left and right rear clamps are mounted on the body 11 supported by the body 11. A motion block (engine/suspension docking motion block) that combines the struts 15A of the rear suspension assembly 15 clamped by arms 31L and 31R.

B7: Operation block for returning to the original position by the transfer device 16 (transfer device original position return operation block).

B8: Left and right front clamp arms 30L and 30R and left and right rear clamp arms 31L by docking device 40
and 31R to their original positions (clamp arm original position return operation block).

By operating the linear motor by the Bl pallet conveying device 17, the engine 14. The pallet 13 on which the body 11 on which the front suspension assembly and the rear suspension assembly 15 have been assembled is moved to the fastening station S.
Operation block (linear motor propulsion block) transported to T3.

B10: Operation block (screw tightening action block) in which the robot 48A performs screw tightening work for fastening the engine 14 and front suspension assembly combined to the body 11.

B11: An operation block (screw tightening operation block) in which the robot 48B performs a screw tightening operation for fastening the rear suspension assembly 15 combined with the body 11.

Further, each of the above-mentioned operation blocks BO to Bll is divided into a plurality of operation steps each accompanied by an output operation. For example, for the pedestal positioning operation block BO, the 10 operations BO30 to BO39 are as follows. Divided into steps.

BO30: Operation step for checking various conditions (condition confirmation operation step).

BO3I: Operation step (BF positioning operation step) in which the positioning means BF moves the pedestal 12 and positions the front part of the body 11 in the vehicle width direction.

BO32: Operation step (BR positioning operation step) in which the positioning means BR moves the pedestal 12 and positions the rear part of the body 11 in the vehicle width direction.

BO33: Operation step (TL
positioning operation step).

BO34: Operation step in which the elevation reference pin FL engages with the front left side portion of the body 11 (FL engagement operation step).

BO35: Operation step in which the lifting reference bin FR engages with the front right side of the body 11 (FR engagement operation step).

BO36: Operation step in which the lifting reference bin RL engages with the rear left side of the body 11 (RL engagement operation step).

BO37: Operation step in which the elevation reference pin RR engages with the rear right side of the body 11 (RR engagement operation step).

BO38: Operation step in which the positioning means BF returns to the original position from the state in which the front part of the body 11 has been positioned in the vehicle width direction (BF original position return operation step).

BO39: Operation step in which the positioning means BR returns to the original position from the state in which the rear part of the body 11 has been positioned in the vehicle width direction (BR original position return operation step).

Next, an example of the production line failure recovery device according to the present invention, which is applied to a vehicle assembly line in which equipment to be subjected to sequence control as described above is installed, will be described.

FIG. 4 shows an example of a production line failure recovery device according to the present invention, together with sequence control target equipment to which the device is applied and a sequence control section connected to them. As described above, the sequence control target equipment 50 includes the positioning device 19
．． Transfer device 16. Docking device 40. Slide device 4
5. It consists of a pallet conveyance device 17 and robots 48A and 48B, and is subject to sequence control by a sequence control section 51.

Facilities 5 subject to sequence control by the sequence control unit 51
Sequence control for the operation of 0 is performed based on a sequence control program loaded into the sequence control section 51. In creating such a sequence control program, first, the above-mentioned operation block BO-811 is are compiled into an action block map with respective attributes as shown in Table 1.

In the operation block map of Table 1, “5C-REG
” is a 16-bit register, one is provided for each of the operation blocks BO-Bll, and the step number is written every time each operation step is executed. “FROM” is the register of the operation block concerned. The operation block immediately before which is the condition for starting the operation of
"" indicates an action block immediately following the action block whose operation is started upon completion of the action of the action block; "clear condition" means an action block in which the equipment related to the action block returns to its original state;
Furthermore, "equipment" refers to the sequence control target equipment related to the relevant operation block.

Table 1 Furthermore, for each of the motion blocks BO-Bll, a plurality of motion steps therein are summarized into a motion step map in which the respective attributes are listed.

For example, for operation steps BO30 to BO39 in the above-mentioned operation block BO, first, input/output transitions for the positioning device 19 as shown in Table 2 are created. In the input/output step of Table 2, "'comment" indicates the contents of each operation step.

Table-2 positioning device B.O.

B3.5 Subsequently, by calling the "comment" in Table 2, an operation step map as shown in Table 3 is compiled. Further, each of the motion blocks B1 to B11 is also summarized into a similar motion step map.

Table 3 Based on the data on each of the motion blocks BO to Bll and their attributes shown in the motion block map of Table 1, the interrelationships between the motion blocks BO to Bll as shown in FIG. A chronologically occurring action block flowchart is formed, and the action block flowchart and the action block BO shown in Table 3 are
A ladder program regarding the operation block BO as shown in FIG. 6 is created from the operation step map for the operation block BO.
Operation blocks B1 to Bl obtained in the same manner as the operation step map for operation block BO shown in Table 3.
A ladder program for each of the motion blocks 81 to Bll, which is similar to the ladder program for the motion block BO shown in FIG. 6, is created from the motion step map for each of the motion blocks 81 to B11. Then, the ladder programs for each of the operation blocks BO to Bll are sequentially connected to form a sequence control ladder program. Therefore, the sequence control section 5
1, the sequence control target equipment 50 whose operations are subjected to sequence control is operated by operation blocks 81 to B.
A plurality of operation steps in each of 11 and 11 are sequentially executed according to the sequence control ladder program created as described above.

An example of a production line failure recovery device according to the present invention is made up of a failure diagnosis/recovery control device 52 and a CRT (cathode ray tube) operation panel device 53.

The failure diagnosis/recovery control device 52 includes a central processing unit (CPU) 62. connected through a path line 61. Memory 63. It has an input/output interface (■10 interface) 64 and a transmitting/receiving interface 65, and further includes a hard disk device 66 as an auxiliary memory connected to the I10 interface 64, a CRT 67 for display, and a keyboard 68 for inputting data and control codes. is provided. Further, the CRT operation panel device 53 is connected to a central processing unit (CPU) 72 . The memory 73 has transmitting/receiving interfaces 74 and 75, and an input/output interface (■10 interface) 76. Furthermore, it has a hard disk device 77 as an auxiliary memory connected to the I10 interface 76, a CRT 78 for display, and data and A keyboard 79 for inputting control codes and a touch panel 80 connected to the transmission/reception interface 74 are provided, and as shown in FIG. 7, the touch panel 80 is attached to the outer surface of the face plate portion of the CRT 78.

The transmission/reception interface 65 provided in the failure diagnosis/recovery control device 52 and the transmission/reception interface 51A provided in the sequence control unit 51 are interconnected, and the transmission/reception interface 75 provided in the CRT operation panel device 53 and the sequence control unit The transmitting/receiving interface 51A provided in the failure diagnosis/recovery control device 51 is interconnected, and furthermore, the transmitting/receiving interface 65 provided in the failure diagnosis/recovery control device 52 and the transmitting/receiving interface 75 provided in the CRT operation panel device 53 are interconnected. .

The failure diagnosis/recovery control device 52 receives and receives program processing data indicating the progress status of sequence control for the sequence control target equipment 50 from the sequence control unit 51 through the transmission/reception interfaces 51A and 65 in accordance with the operation of the keyboard 68, The CPU 62 executes the sequence control target equipment 50 according to the loaded failure diagnosis program, for example, based on the execution time of each operation block in the sequence control target equipment 50 detected from the program processing data from the sequence control unit 51.
If the occurrence of a failure is detected, the operating element that caused the failure in the equipment 50 to be sequence controlled is investigated, and a fault diagnosis is performed to urge the repair of the operating element. After the operating element that caused the failure is repaired, the sequence control target equipment 50
A return control is performed to return to a state where the sequence control of the operation is performed by the sequence control section 5. Note that the hard disk device 66 stores data for each step ladder element in the sequence control ladder program loaded into the sequence control section 51 in a state that is read out individually. It is said that a database regarding the program will be constructed.

The CRT operation panel device 53 also includes a touch panel 80 attached to the outer surface of the face plate of the CRT 78.
is formed as a transparent body as a whole, and when a finger or the like is brought into contact with its surface, it generates an output signal according to the contact position, and as shown in FIG. A plurality of types of operation panels each having an array of operation elements such as switches are selectively displayed on the face plate portion. Then, by touching with a finger or the like a position on the surface of the touch panel 80 that corresponds to a selected one of the operation elements of the operation panel displayed on the face plate portion of the CRT 78, the output obtained from the touch panel 80 at that time. The transmission/reception interface 74 receives the signal as an operation input indicating that a selected one of the operation elements of the operation panel corresponding to the contact portion on the touch panel 80 has been operated.
It is possible to supply it through. CR
Display data for displaying a plurality of types of operation panels selectively displayed on the face plate portion of the T7B is stored in the hard disk drive 77.

In addition to the operation panel, the faceplate of the CRT 78 also displays illustrations showing the operating parts of the equipment 500 subject to sequence control, and the display data for this is also stored in the hard disk drive 77. It is supposed to build a database. Operation input supplied through the transmission/reception interface 74 by touching the touch panel 80 with a finger or the like is given to the CPU 72, and
From the transmission/reception interface 75, the sequence control unit 5
1 through its transmitting/receiving interface 51A, so that a state can be taken in which operation control of the operating elements in the equipment 50 to be sequenced is controlled.

As mentioned above, when the operation panel input section is formed by the CRT7B and the touch panel 80, the CRT78
Each time a selected operation panel is displayed on the faceplate of the CRT 78, the position of each operation element on the operation panel displayed on the faceplate of the CRT 78 and the touch panel 80 are displayed.
The correspondence relationship with the position above is set.

With such a configuration, when a failure occurs in the equipment 50 subject to sequence control, an operation is performed to restore it to a state in which proper sequence control is performed.The process is described below. This will be described along the flowchart shown in FIG.

First, the failure diagnosis/recovery control device 52 determines whether a failure has occurred in the sequence control target installation 50 (step Pi). When a failure occurs in the equipment 50 subject to sequence control, a failure analysis is performed (step P2), and as a result, among the plurality of operation blocks shown in the flowchart of FIG. 5, the one related to the occurrence of the failure is That is, the faulty operation block is identified, and the one that caused the failure among the plurality of operation steps in the identified operation block, that is, the failed operation step is identified and the failed operation element that caused the failure is identified. is specified (step P3).

Next, after the fault diagnosis/recovery control device 52 makes a recommendation for repairing the faulty operating element, the repair of the faulty operating element is awaited (step P4).

When the faulty operating element is repaired, all of the multiple operating blocks shown in the flowchart of FIG.
For example, operation step B999 shown in Table 3 above.
It is determined whether or not the control has reached a returnable operation step, and the sequence control unit 51 is in a state where it is possible to restart the sequence control (step P5). If the activation is possible, the sequence control by the sequence control unit 51 is immediately restarted (step P6). On the other hand,
If the control of all of the plurality of operation blocks has not reached the recoverable operation step and the restart cannot be performed, the fault diagnosis/recovery control device 52
Switching to the return control operation mode is performed in , an uncompleted operation block in which the control has not reached a returnable operation step among the plurality of operation blocks is identified, and furthermore, multiple operation blocks in the uncompleted operation block are identified. Among the operation steps, a control stop operation step in which control is stopped is identified (step P7).

Subsequently, data indicating a step ladder element corresponding to the specified control stop operation step is read from the hard disk device 66, and a display based on the data is displayed on the CRT 6.
7 is taken, and a step ladder element corresponding to the control stop operation step is displayed on the face plate portion of the CRT 67 (step P8). and,
The step ladder element displayed on the face plate of the CRT 67 is referred to and analyzed, and the operating element causing the control stop operation step is identified (step P9), and the identified operating element is An operating element to be operated in order to manually operate the controller is found (step PIO). That is, the operating element that should be activated in order to proceed from the control stop operation step to the next operation step is specified, and the operating element that should be operated to operate the operating element that is to be activated is specified. It will be found.

Operation element data for detecting the operation elements found in this way is sent from the transmission/reception interface 65 of the failure diagnosis/recovery control device 52, and is transmitted to the CRT operation panel device 5.
3 through its transmission/reception interface 75 (step P11).

In the CRT operation panel device 53 to which the operation element data has been supplied from the failure diagnosis/recovery control device 52, display data corresponding to the operation panel including the operation element generated by the operation element data is read from the hard disk drive 77. is supplied to the CRT 78, and the touch panel 80 is displayed on the face plate of the CRT 7B, including the operation elements generated by the operation element data.
A finger or the like is brought into contact with a position on the surface of the CRT 78 that corresponds to the operating element determined by the operating element data from the failure diagnosis/recovery control device 52 among the operating elements of the operating panel displayed on the face plate portion of the CRT 78. Then, an operation input indicating that the operation element selected by the operation element data from the failure diagnosis/recovery control device 52 has been operated is supplied from the touch panel 80 through the transmission/reception interface 74 . And, such operation input is
It is supplied to the operation panel device 53 from its transmission/reception interface 75 and to the sequence control section 51 through its transmission/reception interface 51A (step P12). As a result, the sequence control unit 51 to which the operation input is supplied operates the actuating element to be actuated in the equipment 50 subject to sequence control, and the data indicating that the actuating element to be actuated has been actuated is transmitted. , is supplied from the transmission/reception interface 51A provided in the sequence control section 51 to the failure diagnosis/recovery control device 52 through its transmission/reception interface 65 (step P13).

The fault diagnosis/recovery control device 52, which has been supplied with data from the sequence control unit 51 indicating that the actuating element that should be actuated has been actuated, takes one step from the control stop operation step to the next operation step. Control is performed to advance the number of steps (step P14),
The next operation step that has been advanced is, for example, as shown in Table 3 above.
It is determined whether or not the operation step B999 is a returnable operation step (step P15). As a result, if the next advanced operation step is not a returnable operation step, that operation step is determined as the specified control stop operation step, and the control stop operation specified from the above-mentioned hard disk device 66 is performed again. The step lag element corresponding to the step is read out and displayed on the CRT 67, and the step ladder element corresponding to the control stop operation step is displayed on the face plate of the CRT 67. Each operation after the above operation is performed in sequence, and this operation state is repeated until the returnable operation step is reached.

When the returnable operation step is reached, the control of all of the plurality of operation blocks shown in the flowchart of FIG. 5 has reached the returnable operation step, and the sequence control unit 5 It is determined whether or not the sequence control can be restarted, and the above-described operations are repeated until the sequence control by the sequence control unit 51 is restarted.

Next, as described above, the failed N diagnosis/recovery control device 52
The operations carried out in the CRT operation panel device 53 when fault diagnosis and recovery control are performed will be described with reference to the flowchart shown in FIG.

First, if the occurrence of a failure in the sequence control target equipment 50 is not detected by the failure diagnosis/recovery control device 52, the hard disk drive 77
The display data showing the operating parts of the equipment 50 subject to sequence control is read out from the CRT 78, and a display based on the data is displayed on the CRT 78, and the CRT 7B performs an operation monitor display (step Q1). ), whether or not operating element data indicating the operating element to be operated in order to operate the operating element to be operated as described above has been supplied from the fault diagnosis/recovery control device 52. This determination is repeated until it is determined that the operation element data has been supplied (step Q2).

Then, when the operation element data for selecting the operation element to be operated in order to operate the operation element to be activated is supplied, the operation panel containing the operation element generated by the operation element data is sent from the hard disk drive 77. The corresponding display data is read out and supplied to the CRT 78, so that an operation panel including the operation elements generated by the operation element data is displayed on the face plate portion of the CRT 78 (steps Q3 and Q4). With this group,
The coordinate reference for the display on the face plate portion of the CRTT 8 is matched with the coordinate reference for the touch panel 80, and the
Among the operation elements of the operation panel displayed on the face plate section of 8, the position corresponding to the operation element determined by the operation element data from the failure diagnosis/recovery control device 52 is the position corresponding to the operation element from the failure diagnosis/recovery control device 52. The operating element specified by the data is set to become a specific contact operating section that generates an operating input that corresponds to being operated (step Q6).

Subsequently, a state is taken in which the determination as to whether or not a finger or the like has been brought into contact with the set specific contact operation section is repeated until it is determined that the hand or the like has been brought into contact with the set specific contact operation section (step Q7). Then, when a finger or the like is brought into contact with the set specific touch operation section, an output signal obtained from the touch panel 80 is caused by the operation of the operation element determined by the operation element data from the fault diagnosis/recovery control device 52. The operation input to be performed is supplied from the transmission/reception interface 75 to the sequence control unit 51 through the transmission/reception interface 51A (step Q8),
Thereafter, it is again determined whether or not the failure diagnosis/recovery control device 52 has supplied operating element data for determining the operating element to be operated in order to operate the operating element to be operated as described above. , is repeated until it is determined that the operation element data has been supplied.

(Effects of the Invention) As is clear from the above explanation, according to the production line failure recovery device according to the present invention, various operations to be performed are performed independently from start to finish under normal conditions. The maximum unit of a series of motions is divided into a plurality of motion blocks, and each of the plurality of motion blocks is divided into a plurality of motion steps. When used in equipment on a production line that is sequence-controlled to perform sequential operations in a set order, and activated when a failure that causes the sequence control to stop occurs, the cause of the failure is eliminated. After this, the equipment can be quickly and easily returned to a state where sequence control of its operations is properly performed, and as a result, damage caused by production line stagnation is reduced.

[Brief explanation of drawings]

FIG. 1 is a basic configuration diagram showing a production line failure recovery device according to the present invention in accordance with the claims, and FIGS.
The figures are a schematic side view and a schematic plan view showing an example of a vehicle assembly line to which the production line failure recovery device according to the present invention is applied, and FIG. 4 shows an example of the production line failure recovery device according to the present invention to which it is applied. Fig. 5 is an operation block flowchart for explaining sequence control for the sequence control target equipment, and Fig. 6 is a block diagram showing the sequence control target equipment and the sequence control unit by the sequence control unit. A ladder diagram showing an example of a sequence control program used for sequence control, FIG. 7 is a schematic perspective view without showing a part of the CRT operation panel device in an example of the production line failure recovery device according to the present invention, and FIG. A schematic plan view, FIGS. 9 and 10, provided for explaining the CRT operating device in an example of the production line failure recovery apparatus according to the present invention serve to explain the operation of an example of the production line failure recovery apparatus according to the present invention. FIG.

Claims (1)

[Claims] Various operations to be performed by equipment on a production line are divided into multiple operation blocks, with the maximum unit of a series of operations that are performed independently from start to finish under normal conditions as an operation block. At the same time, each of the plurality of action blocks is divided into a plurality of action steps, and sequence control is performed to sequentially execute the plurality of action steps in each of the plurality of action blocks in a preset order. When a failure occurs in the above equipment, when the operating element that caused the failure is repaired, the operation block that is stopped at an intermediate operation step without reaching a returnable operation step is moved to the failed operation. A fault operation block specifying means for identifying a block as a block; an operation element specifying means for specifying each of the operation steps up to the returnable operation step, and further specifying an operation element to be operated in order to actuate the operation element to be activated; and identification by the operation element specifying means. an operating element display means for displaying the operating element to be operated in an operable state, so that when the operating element to be operated is operated, the operating element to be operated is actuated; , Each time the actuating element to be actuated is actuated, each of the actuation steps from the intermediate actuation step to the recoverable actuation step is sequentially advanced, and the state in which the malfunctioning action block has reached the recoverable actuation step. A production line comprising: an operation step progression means for making the above operation step; and a restart means for restarting the sequence control for the equipment when the failed operation block reaches the restorable operation step. Failure recovery device.