JP2001057809A - Memory controller for error signal in farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the writing frequency of an error historical data in a nonvolatile memory by a simple constitution. SOLUTION: This memory controller for an error signal in a farm working machine is capable of transmitting an error historical data in a nonvolatile memory 84 to a buffer memory region 96b and an error historical data memory region 96a in a RAM 96 and storing the data therein (S1) by making a power source of the farm working machine work, on the other hand, transmitting an error data of an error signal to the error historical data memory region 96a when the error signal is present in external equipment (S4: yes), additionally storing the data in the error historical data memory region 96a (S5) and further comparing both data in the buffer memory region 96b and the error historical data memory region 96a and newly storing the data in the error historical data memory region 96a in the buffer memory region 96b and the nonvolatile memory 84 (S7) only when both the data are not coincident (S6: no) in the controller capable of delivering a control signal from external equipment such as sensors or setters installed in a travel part, a working part, an operating part, etc., and performing the control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an error signal storage control device for an agricultural work machine such as a combine.

[0002]

2. Description of the Related Art A recent agricultural work machine such as a combine machine controls a sensor or a setting device for transmitting a signal of a control amount to a control means as a control target, for example, an output (load) of an engine of a traveling machine body. Electronic governor as an actuator, fuel injection amount detection sensor (rack position detection sensor for adjusting the position of the fuel injection plunger), discharge auger to discharge the grains in the grain tank to the outside, to the conveyor An auger clutch operating position detection sensor for disconnecting power, an auger position setting device for instructing (setting) the horizontal direction of the horizontal cylinder of the discharge auger and the height of a grain discharge portion at the tip of the horizontal cylinder, A sensor for detecting an operation amount of a control target according to the control signal, for example, a speed sensor for detecting a traveling speed of an agricultural work machine or a rotation speed of a work unit of a threshing unit, and the discharge auger. It includes a horizontal orientation sensor and the height sensor of the transverse tube are normally made to be controlled by a control means such as a microcomputer.

[0003] Also, when the signals of the above-mentioned various sensors and setting devices are abnormal during the agricultural work, the location where the error signal is output is stored as an error history in the memory of the control means, and the periodical operation is performed later. In an inspection or the like, an operator reads out error history data from the memory and displays the data on a liquid crystal display device or the like to use as data for maintenance or repair.

[0004] This type of error history data is stored in an EEPR so that it is not erased even when the controller is turned off.
It is configured to be stored in an electrically erasable and writable nonvolatile memory such as OM.

[0005]

However, in this type of nonvolatile memory, the number of rewritable times is RA
M (Random write / read memory that requires a memory holding operation)
Unlike the above, there is a limit, and the number of possible times is about several hundred to several thousand times. For example, an error such as generation of ON / OFF signal many times due to a wiring failure of the same one sensor may occur. In such a case, if the error data is stored in the non-volatile memory every time the error occurs, the number of times of writing exceeds the allowable number of times in a short time, and the non-volatile memory becomes unusable. There was a problem that it would.

[0006] This type of nonvolatile memory has a writing speed lower than a reading speed, and more generally, an RS232.
Since the CPU of the controller and the external device are connected via a serial interface such as C and the data is sequentially transmitted one bit at a time, the data transmission time becomes longer. Therefore, if the operation of writing the data for the error history into the non-volatile memory is interrupted while the control of the normal agricultural work or the like is being executed, there is a problem that the agricultural work cannot be controlled smoothly and quickly.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems of the prior art, and can reduce the number of times of writing error history data to a nonvolatile memory with a simple configuration. It is an object of the present invention to provide an error signal storage control device in an agricultural work machine capable of storing predetermined error history data in a non-volatile memory while not hindering the operation.

[0008]

According to a first aspect of the present invention, there is provided an apparatus for controlling the storage of an error signal in an agricultural working machine according to the first aspect of the present invention. External devices such as sensors and setting devices,
A controller for controlling by sending and receiving control signals to and from external devices, a memory that can be read and written at any time, and a nonvolatile memory that can be electrically erased and written, and the memory that can be read and written at any time has a buffer storage area, And an error history data storage area, and when the power of the agricultural working machine is turned on, the error history data in the electrically erasable and writable nonvolatile memory is transferred to the two storage areas and stored, while the external When there is an error signal in the device, the error data is transferred to the error history data storage area to additionally store the data, and only when the data in the buffer storage area and the error history data storage area do not match is compared. The data in the error history data storage area is stored in the buffer storage area and the electrically erasable and writable nonvolatile memory. Is characterized in that performs control so as to newly stored in the directory.

According to a second aspect of the present invention, there is provided a storage control device for an error signal in an agricultural working machine, comprising: an external device such as a sensor and a setting device provided in a traveling unit, a working unit, an operating unit, etc. of the agricultural working machine; A controller for transmitting and receiving control signals to and from the device, a memory that can be read and written at any time, and a non-volatile memory that can be electrically erased and written, and the memory that can be read and written at any time has a buffer storage area,
An error history data storage area, and when the agricultural work machine is powered on, the error history data in the electrically erasable and writable nonvolatile memory is transferred to and stored in both storage areas, while the external device When the error signal is present, the error data is transferred to the error history data storage area to additionally store the data, and only when both the data in the buffer storage area and the error history data storage area are compared and they do not match, The data in the error history data storage area is newly stored in the buffer storage area,
By the power OFF operation of the agricultural work machine, the controller operates the self-holding circuit, stores the data in the buffer storage area in the electrically erasable and writable nonvolatile memory, and then turns off the power of the entire controller. Control is performed as described above.

Further, according to a third aspect of the present invention, in the storage control device for an error signal in the agricultural working machine according to the first or second aspect, it is preferable that the error data can identify each of the external devices. Features.

[0011]

FIG. 1 is a left side view of the combine, FIG. 2 is a plan view of the combine, FIG. 3 is a right side view of the combine, and FIG. Front view, FIG. 5 is a skeleton diagram of the power transmission system,
FIG. 9 is a functional block diagram of the control device.

Traveling body 1 in the combine of the present invention
Is configured to be able to move up and down with respect to a pair of left and right traveling crawlers 2a of the traveling unit 2 via a traveling unit elevating drive unit described later. A threshing device 3 as a working unit is mounted on the left side in the traveling direction of the traveling machine 1, and a pre-cutting device 4 as a working unit disposed in front of the traveling machine 1 is connected via a lifting frame 14. It is rotatably supported with respect to the traveling machine body 1 and is configured to be able to move up and down by a single-acting mowing unit elevating hydraulic cylinder 9 as a mowing unit elevating actuator mounted between the elevating frame 14 and the traveling machine body 1. Have been.

A clipper-type cutting blade device 5 is disposed below the lower frame of the pre-cutting device 4 and a grain stem raising device 6 for six rows is disposed in front of the cutting blade device 5. A grain culm conveying device 8 is arranged between the front end of the feed chain 7 and a weed body 10 protruding from the lower front of the grain culm raising device 6. A driver's cab 11 is arranged at the front right side of the traveling machine body 1, and a grain tank 12 is arranged at the rear side.

As shown in FIG. 5, a part of the power from the engine 15 provided in the lower rear portion of the cab 11 is supplied to the bottom screw conveyor 17 in the grain tank 12 and the discharge auger 20 through the auger clutch 16 as shown in FIG. The hydraulic pump / hydraulic motor type (H) of the traveling unit 2 is transmitted to the vertical screw conveyors 18a and 18b in the
TS type) Handling cylinder 3a of threshing unit 3 of traveling drive unit 24
1. The screw conveyor 22a of the first gutter, the screw conveyor 22b of the second gutter, the feed chain 7, the screw conveyor 23 for raising the grain tank 12, and the like are rotationally driven. The power transmission to the pre-cutting device 4 is performed by the output shaft 26 from the traveling drive unit 24 when the traveling speed is synchronized.
, And is driven by the clutch 25 and the branch power from the power branch transmission 19 when not synchronized.

As shown in FIGS. 3 and 7, the grain tank 1
2 comprises a vertical pipe 28b disposed at the rear end of the traveling body 1 from a screw conveyor provided at the lower part of the traveling body 1, and a horizontal pipe 28a connected to the upper end thereof so as to be vertically rotatable. Through the discharged auger 28, the grains accumulated in the grain tank 12 can be discharged to a part such as a truck bed. The vertical pipe 28b can be turned around the vertical axis by a drive motor 64b and a gear mechanism 57, and the horizontal pipe 28a is connected to the discharge auger hydraulic cylinder 6 mounted between the vertical pipe 28b and the vertical pipe 28b.
The angle of inclination can be changed by the link mechanism 4a and the link mechanism 58.

An angle sensor 85 such as a rotary encoder provided on the drive motor 64b can detect the horizontal turning angle of the vertical pipe 28b and thus the turning position of the horizontal pipe 28a. An angle sensor 86 such as a potentiometer provided at a location can detect the elevation angle of the horizontal pipe 28a and, consequently, the height position of the discharge portion at the tip of the horizontal pipe 28a. When the discharge auger 28 is not used, an intermediate portion of the horizontal pipe 28a is placed on a rest table 87 provided on the upper surface of the grain tank 12 or the like. This rest table 8
7 is provided with a rest detector 88 such as a contact sensor for detecting whether or not the horizontal pipe 28a is mounted.

As shown in FIG. 6 (a traveling section viewed from the left side), the traveling section 2 is composed of a pair of left and right track frames 50 and 5.
0 and a traveling crawler 2a wound around the outer periphery of a driving wheel 51, a driven wheel 52, and a plurality of rolling wheels 53 arranged in the middle of the lower surface of the track frame 50, respectively. , 50 and the traveling body 1 are connected to the right and left elevation control hydraulic cylinders 54a, 54b, the L-shaped levers 55a, 55b in the front-rear position, and the front-rear levers 55a, 55b so as to simultaneously operate the front-rear levers 55a, 55b. The right and left lifting control hydraulic cylinders 54 are connected via a traveling unit lifting / lowering driving means composed of
The a and b operate independently of each other to independently raise and lower the left and right traveling units 2 and 2 with respect to the left and right of the traveling body 1.

Accordingly, when the piston rods of the right and left lifting control hydraulic cylinders 54a and 54b are simultaneously projected, the traveling body 1 moves upward (moves up) away from the traveling parts 2 and 2 on the left and right sides. The relative height (vehicle height) of the body 1 with respect to the traveling portions 2 and 2 increases. Conversely, when the piston rod is simultaneously retracted, the traveling body 1 moves downward (down) with respect to the traveling sections 2 and 2 on the left and right sides, and the relative height (vehicle height) of the traveling body 1 with respect to the traveling section. Will be lower.

Then, the piston rod of the left hydraulic cylinder 54a is projected, or the right hydraulic cylinder 5
When the piston rod 4b is retracted (or both operations are performed simultaneously), the vehicle height of the traveling body 1 with respect to the right traveling section 2 decreases (the vehicle height of the traveling body 1 with respect to the left traveling section 2). Becomes higher), and the traveling body 1 tilts downward and to the right. Conversely, the piston rod of the right hydraulic cylinder 54b is projected, or the left hydraulic cylinder 5
When the piston rod 4a is retracted (or both operations are performed at the same time), the vehicle height of the traveling body 1 with respect to the left traveling section 2 decreases (the vehicle height of the traveling body 1 with respect to the right traveling section 2). Becomes higher), and the traveling body 1 inclines to the lower left.

As shown in FIG. 6, by detecting the amount of protrusion of the piston rods of the right and left lifting hydraulic cylinders 54a and 54b, the relative height (vehicle height) of the traveling body 1 with respect to each of the left and right traveling portions 2 and 2 is detected. ) Are configured to be interlocked with each other via a connecting rod 72 and a link mechanism 73 connected to the connecting rod 56, such as a rotary encoder type for detecting vehicle height.

The inclination detecting sensor 74 for detecting the degree of left and right inclination of the traveling body 1 is a pendulum type (gravity type).
And the like, and is disposed at an arbitrary position of the traveling body 1, for example, in the cab 11 or the like. In addition, the ultrasonic sensors 20a and 20b as the cutting height sensors for detecting the cutting height by detecting the ground height between the cutting pre-processing device 4 and the field scene,
As shown in FIG. 4, the ultrasonic sensors 20 a and 20 b are disposed on brackets (not shown) provided on the back side of the cereal stem raising device 6 on both left and right ends of the pre-cutting device 4.
The transmitting part (horn part) of the transmitter and the receiving part of the receiver are arranged so as to face the field scene. Each ultrasonic sensor 2
When the installation heights of the cutting blades 0a and 20b are different from the installation height of the cutting blade 5, the detection value of the cutting height is obtained by a predetermined conversion from the detection values of the ultrasonic sensors 20a and 20b.

An elevation position sensor 75 for detecting the relative height between the traveling machine 1 and the pre-cutting device 4.
Is configured to be obtained by detecting a rotation angle of the lifting frame 14.

A control panel (not shown) in the operator's cab 11 has a changeover switch 76 for switching between an automatic mode and a manual mode, and a vehicle height control irrespective of the automatic mode and the manual mode. In this case, an operation lever 77 as a manual variable operation unit capable of changing and adjusting the height (vehicle height) of the traveling body 1 and an inclination setting device 78 for setting a left-right inclination angle of the traveling body 1 are arranged. .

FIG. 7 shows the lifting hydraulic cylinder 54a,
54b shows a hydraulic circuit for the hydraulic pump 54b and the like, and branches via a branch valve 63 for branching the pressure oil discharged from the hydraulic pump 60;
A hydraulic cylinder 9 as a mowing unit elevating actuator for elevating the mowing pre-processing device 4 from one of the discharge paths.
And the right and left (operator cab 11 side) lifting / lowering control hydraulic cylinders 5
4b to the first hydraulic circuit 61. From the other discharge path of the flow dividing valve 63, the horizontal pipe 28a of the discharge auger 28
The hydraulic cylinders 9 and 64 are configured to send the hydraulic cylinders 64 to the second hydraulic circuit 62 for the discharge auger lifting hydraulic cylinder 64a for changing the inclination angle with respect to the vertical pipe 28b and the left lifting hydraulic cylinder 54a.
a, 54a, 54b electromagnetic control valves 65, 66, 6
7, 68, a check valve, a relief valve and the like are connected.

FIG. 9 is a functional block diagram of a control device (controller) 70 for controlling the traveling speed, attitude and vehicle height of the traveling body 1, the discharge position of the discharge auger 28, and the like.
The control device 70 is an electronic control device such as a microcomputer. Although not shown, a central processing unit (CPU) 71 for executing various arithmetic processing and control, a read-only memory (ROM) storing a control program, and the like. ) 82,
A random access memory (RAM) 83 for temporarily storing various detected values, data, and the like, a clock as a timer function, an interface, a bus, and the like are provided.

Reference numeral 84 denotes a memory connected to the control device 70, which is an EEPROM as a non-volatile memory whose stored values are not erased even when the power is turned off, and which can be electrically erased and written. . The non-volatile memory 84 stores the RS as a serial interface.
It is connected to the CPU 71 via 232C73. The non-volatile memory 84 includes various setting units 78, 80, 81, 92, 95 and sensors 20a, 20
b, 72a, 72b, 74, 75, 85, 86, 93,
The error history when an error occurs in a signal due to disconnection of the external device or the like is stored for each external device. A RAM (memory readable and writable at any time) 96 having an error history data storage area 96a for storing error history data and a buffer storage area 96b;
Further, a power switch (key switch) 97 of the entire traveling body is also connected to the control device 70. The control device 70 also functions as a controller as an error signal storage control device, as described later.

The control device 70 detects the relative height (vehicle height) of the traveling machine body 1 with respect to the left and right traveling portions 2 and 2 corresponding to the amount of protrusion of the piston rods of the left and right elevation control hydraulic cylinders 54a and 54b. Detection values of vehicle height detection sensors 72a and 72b such as a rotary encoder, a detection value of an inclination sensor 74, and ultrasonic sensors 20a and 20 provided at both left and right ends of a pre-cutting device 4 as the cutting height sensor.
The detection value of b, the detection value of the mowing part elevating position sensor 75, the detection value of the angle sensor 85 for detecting the horizontal turning angle of the discharge auger 28, and the elevation angle of the horizontal auger cylinder 28a of the discharge auger 28 are also detected. The value detected by the angle sensor 86 is input. When the horizontal auger cylinder 28a is placed on the rest table 88, the detection value of the angle sensor 86 is 0 degree, and the angle at which the horizontal auger cylinder 28a rises is detected. In addition, the angle sensor 85 can detect the angle of horizontal turning horizontally with reference to the rest position when the horizontal auger cylinder 28a is placed on the rest table 88.

Operations such as raising and lowering and horizontal turning of the discharge auger 28 are performed by a command switch (a switch) in an operation section 90 disposed in the cab 11 and a tip operation section 91 provided beside the discharge section at the tip of the horizontal auger cylinder 28a. (Not shown). The horizontal turning angle can be set by a potentiometer type turning angle setting device 95 provided in the operation section 90.

The control device 70 is connected to a plunger driving means for adjusting a fuel injection amount in a fuel injection pump of an electronic governor 92 as an actuator for controlling a fuel supply amount to the engine 16 and for feedback control. Is connected to a rack position sensor 93 for detecting the position of the plunger.

The control device 70 includes a mode changeover switch 76 for switching the control mode between an automatic mode and a manual mode, and an operation lever 77 as a manually variable operation unit for manually changing and adjusting the vehicle height. , A potentiometer-type inclination setting device 78 for setting the degree of left and right inclination of the traveling body 1, a potentiometer-type cutting height setting device 80, and a threshing switch 81. Value and ON / O of the setting device
Each of the FF detection signals is input. Further, a vehicle speed sensor 94 of the traveling section 2 is connected to the control device 70.

Then, by operating the electromagnetic control valves 67, 68 connected to the output side of the control device 70, the left and right lifting control hydraulic cylinders 54a, 54b are driven to raise the heights of the left and right traveling parts 2, 2. By raising and lowering each independently,
While controlling the left-right inclination posture of the traveling machine body 1 and, consequently, the left-right inclination posture of the mowing pre-processing device 4, the elevation hydraulic cylinder 9 is driven by the operation of the electromagnetic hydraulic switching valve 65 connected to the output side of the control device 70. The height of the pre-cutting device 4, in other words, the cutting height can be controlled.

When the threshing switch 81 is turned on, the threshing clutch for transmitting power to the threshing unit is turned on, and power can be transmitted. When the threshing switch 81 is OFF, power transmission is cut off. When the threshing switch 81 is turned off or the mode changeover switch 76 is turned off (switching in the manual mode direction) (OR condition), the “manual mode” is set.
Becomes

In the manual mode, the operator operates the operation lever 77 manually to adjust the vehicle height and the left and right inclination of the traveling machine body 1. In the vehicle height control (elevation control), the left and right both sides elevation control is performed. Hydraulic cylinder 54a,
54b is driven to simultaneously change the left and right vehicle heights. In the inclination control based on the right vehicle height reference, the inclination is first adjusted only by the left vehicle height, and only when the inclination angle is still insufficient, the adjustment is performed by the opposite (right) vehicle height. Conversely, in the inclination control based on the left vehicle height reference, the inclination is first adjusted only by the right vehicle height, and then adjusted only by the left vehicle height when the inclination angle is still insufficient.

Under the condition that the threshing switch 81 is ON and the mode changeover switch 76 is ON (AND condition),
It becomes "auto mode". In the automatic mode, the vehicle body 1 is automatically tilted left and right so as to have the tilt set by the tilt setting device 78. By selecting the vehicle height reference side switch 89, the right vehicle height reference is selected. It can be arbitrarily selected between the case and the case based on the left vehicle height. In this case, if a lamp (not shown) is provided on the operation panel and the selected reference side is displayed, the operator can easily recognize the reference side.

Next, control for retaining the storage of error history data will be described with reference to the flowchart of FIG. When the power switch 97 is turned on (ON), the controller (control device) 70 is started, and following the start of the flowchart, the error history data in the nonvolatile memory 84 is stored in a RAM (randomly readable / writable memory) 9.
6 is separately read and stored in the error history data storage area 96a and the buffer storage area 96b (S1).

If no error has occurred in the past, there is no error history data in the nonvolatile memory 84. Here, the error history data is a data of whether or not an error has occurred for each external device such as each of the sensors and the setting device, and specifies an address of a memory for each of the external devices. If an error has occurred at least once, the (applicable) external device is determined and stored in a predetermined memory location (address) in the nonvolatile memory 84. Normally, each external device can be distinguished for each identification code from No. 22 to No. 99 in a 4-bit memory consisting of a tens digit and a first digit. However, the number of times of error occurrence is not counted and not stored.

Next, each storage area 96 of the RAM 96
It is determined whether the reading of the error history data into a and 96b has been completed (S2).

Next, when the reading is not completed in the above judgment (S2: no), the process returns to S1 and the reading operation is continued. If the reading is completed by the determination (S2: yes), the agricultural work is executed. In the case of this embodiment, the rice (grain stalk) in the field is harvested by the combine and threshing work is executed (S
3). During this operation, the CPU 71 constantly monitors whether an error has occurred due to an abnormality in transmission / reception of a signal to / from each external device or whether the signal value exceeds a normal range. Then, it is determined whether an error has occurred (S4).

When it is determined that an error has occurred (S
4: yes), the identification code of the external device in which the error has occurred is written into the error history data storage area 96a (S5). If an error has occurred in the same external device in the past, since the identification code stored in the error history data storage area 96a already exists,
Even if the same identification code is written, the identification code stored in the error history data storage area 96a does not change. When an error has newly occurred in another external device, the corresponding identification code is written and stored in the error history data storage area 96a.

When it is determined that no error has occurred (S4: no), the process returns to step S3.

Next, the error history data (identification code) stored in the error history data storage area 96a is compared with the error history data (identification code) stored in the buffer storage area 96b to determine whether they match. Is determined (S
6). If a new error occurs in an external device in which no error occurred in the past, a new identification code is additionally stored in the error history data storage area 96a in S5, and is stored in the buffer storage area 96b. Since the error history data (identification code) is old error history data (identification code), both data do not match (different from each other).

Conversely, even if a new error occurs in an external device in which an error has occurred at least once in the past, the identification code additionally stored in the error history data storage area 96a in S5 is the same as before. And the old error history data (identification code) stored in the buffer storage area 96b.

When it is determined that the data in the two storage areas do not match (S6: no), the data in the error history data storage area 96a is transferred to the buffer storage area 96b and also to the nonvolatile memory 84. The data is rewritten (S7). When it is determined that the data in the two storage areas match (S6: yes), the step S
Return to before 3.

The data transfer from the error history data storage area 96a to the buffer storage area 96b in the RAM 96 is performed by one controller (microcomputer).
Since the data transfer is performed through an 8-bit or 32-bit bus, the data transfer can be performed quickly. However, the transfer of data from the RAM 96 to the nonvolatile memory 84 is performed bit by bit through the serial interface 73, and the speed of writing data to the nonvolatile memory 84 is low. In addition, while the data is being transferred to the nonvolatile memory 84, other controls tend to wait in order, so that inconvenience such as uncertainty in the control of the agricultural work is likely to occur.

Therefore, as another embodiment, the data in the error history data storage area 96a is transferred to and stored in the buffer storage area 96b instead of the step S7.
Such control is repeated during the execution of the agricultural work (during the activation of the controller 70) (S8, S9: no). Next, when the farm work is completed and the power switch (key switch) 97 is turned off (S9: yes), the self-holding circuit 1 in the controller 70 is
00 (see FIG. 11) is activated and the buffer storage area 9 is activated.
The error history data stored in the memory 6b is transferred to and stored in the non-volatile memory 84, and when the writing operation is completed, the self-holding circuit 100 operates to activate the controller 7.
0 is automatically turned off (S10). Thus, the slow operation of transferring and writing the error history data to the non-volatile memory 84 does not hinder the control of the agricultural work, and the operator can turn off the power switch (key switch) 97 and then perform the agricultural work. It is possible to move away from the machine and move on to other tasks, thereby increasing the efficiency of agricultural work.

The error history data (identification code) may be character data or numeric data. In this manner, the error history data once stored in the non-volatile memory 84 serves as a clue to the past error occurrence status, and is displayed on a display device at the time of maintenance work or repair work to be used as a reference for these works. Can be.

The second relay 1 connected to the power source 103
02 is connected to the Vcc input of the controller 70,
The other terminal of the power switch 74 connected in parallel with the second relay 102 is connected to the key input terminal of the controller 70 and the first terminal.
It is connected in parallel with the cathode of the diode D of the relay 101, and the other terminal (anode) of the first relay 101 is grounded. The anode of the diode D in the second relay 102 and the other contact of the first relay 101 are connected to a self-holding circuit 100 in the controller 70.
With this configuration, when the power switch 74 is turned on, the first relay 101 and the second relay 102 operate,
Power is supplied to the controller 70. Controller 7
In the state 0, the power supply output of the self-holding circuit 100 is turned on by turning on the power, and the second relay 102 is operated to hold the power-on state of the controller 70.

When the power switch 74 is turned off, the controller 70 performs a termination process such as a write operation to the non-volatile memory 84, and then executes the self-holding circuit 100.
The power management output in the middle is turned off, and the power supply of the controller 70 itself is cut off.

Incidentally, as the RAM for storing the error history data, a RAM mounted on a one-chip microcomputer may be usually used.

It goes without saying that the present invention can be applied not only to combine harvesters but also to traveling agricultural working machines such as tractors for cultivation and rice transplanters.

[0051]

As described above, according to the first aspect of the present invention, there is provided an error signal storage control device for an agricultural working machine, comprising: a sensor, a setting device provided in a traveling unit, a working unit, an operating unit, etc. of the agricultural working machine. And the like, an external device, a controller that sends and receives control signals to and from the external device, and a controller, a memory that can be read and written at any time, and a nonvolatile memory that is electrically erasable and writable. Is
A buffer storage area and an error history data storage area are provided, and when the power of the agricultural work machine is turned on, the error history data in the electrically erasable and writable nonvolatile memory is stored.
When an error signal in the external device is present, the error data is transferred to an error history data storage area to additionally store data, and the buffer storage area and the error history data are stored. Only when the two data in the storage area are compared and the two data do not match, control is performed so that the data in the error history data storage area is newly stored in the buffer storage area and the electrically erasable and writable nonvolatile memory. Things.

With this configuration, when the controller is powered on, the error history data once stored in the non-volatile memory is written into the buffer storage area and the error history data storage area in the RAM, and then newly written. When an error occurs, it is first written to an error history data storage area. By comparing this data with the data in the buffer storage area where the past error history data is stored, it is determined whether or not they match, so that only the data relating to the error with respect to the external device in which no error has occurred in the past is obtained. Is newly stored in the buffer storage area and the electrically erasable and writable nonvolatile memory,
There is an effect that the number of times data is rewritten in the nonvolatile memory can be greatly reduced.

The error history data that has occurred or has not occurred in the past in the external device is stored in the non-volatile memory, so that the data is stored and retained even when the controller is turned off. In this case, it is possible to refer to the error history data at the time of repair work and to use the data for the repair work and the like.

Further, according to the second aspect of the present invention, there is provided a storage control device for an error signal in an agricultural working machine, comprising: A controller for transmitting and receiving control signals to and from the device, a memory that can be read and written at any time, and a non-volatile memory that can be electrically erased and written, and the memory that can be read and written at any time has a buffer storage area,
An error history data storage area, and when the agricultural work machine is powered on, the error history data in the electrically erasable and writable nonvolatile memory is transferred to and stored in both storage areas, while the external device When the error signal is present, the error data is transferred to the error history data storage area to additionally store the data, and only when both the data in the buffer storage area and the error history data storage area are compared and they do not match, The data in the error history data storage area is newly stored in the buffer storage area,
By the power OFF operation of the agricultural work machine, the controller operates the self-holding circuit, stores the data in the buffer storage area in the electrically erasable and writable nonvolatile memory, and then turns off the power of the entire controller. Is controlled as follows.

In this configuration, when the power is turned on to the controller, the error history data once stored in the non-volatile memory is written into the buffer storage area and the error history data storage area in the RAM, and then a new error occurs. Then, first, it is written to the error history data storage area. By comparing this data with the data in the buffer storage area where the past error history data is stored, it is determined whether or not they match, so that only the data relating to the error with respect to the external device in which no error has occurred in the past is obtained. Is newly stored in the buffer storage area. The work of writing the error history data in the non-volatile memory is performed by the operation of the self-holding circuit in the controller after the farm work is completed and the power is turned off, so that the control during the farm work is not disturbed and the nonvolatile work is performed. After the data has been written into the volatile memory, the power to the controller is automatically cut off, so that the effect of increasing the efficiency of the agricultural work is achieved.

According to a third aspect of the present invention, in the storage control device for an error signal in the agricultural work machine according to the first or second aspect, the error data can identify each of the external devices. It suffices if the external device in which the error has occurred can be distinguished from the external device in which the error has not occurred.
Since the number of errors that have occurred is not stored as data, the storage capacity of the memory can be reduced, the manufacturing cost can be reduced, and the time required for writing and reading data can be reduced.

[Brief description of the drawings]

FIG. 1 is a left side view of a combine.

FIG. 2 is a plan view of the combine.

FIG. 3 is a right side view of the combine.

FIG. 4 is a front view of the combine.

FIG. 5 is a skeleton diagram of a power transmission system.

FIG. 6 is a side view of an elevating drive unit of the traveling unit.

FIG. 7 is a hydraulic circuit diagram.

FIG. 8 is an explanatory view of means for raising and lowering and horizontally turning a discharge auger.

FIG. 9 is a functional block diagram of a control device.

FIG. 10 is a flowchart of control.

FIG. 11 is an explanatory diagram of a self-holding circuit in the controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2, 2 Crawler type running part 4 Cutting pre-processing device 20a, 20b Ultrasonic sensor 54a, 54b Hydraulic cylinder 65, 66, 67, 68 Electromagnetic control valve 70 Control device 72a, 72b Vehicle height sensor 74 Inclination sensor 77 Operation lever 78 Tilt setting device 82 ROM 83 RAM 84 Non-volatile memory 85, 86 Angle sensor 88 Rest detector 96 RAM 96a Error history data storage area 96b Buffer storage area

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tomohiro Koyama 1-32 Chayamachi, Kita-ku, Osaka-shi Yanmar Agricultural Machinery Co., Ltd. F-term (reference) 2B076 AA03 EC23 ED30 5B042 GB05 MA04 MA05 MA06 MA08 MA09 MC15

Claims (3)

[Claims] 1. An external device such as a sensor or a setting device provided in a traveling unit, a working unit, an operation unit, or the like of an agricultural work machine, a controller that transmits and receives a control signal to and from the external device, and a memory that can be read and written as needed. And an electrically erasable and writable non-volatile memory. The occasionally readable and writable memory includes a buffer storage area and an error history data storage area. While the error history data in the erasable and writable nonvolatile memory is transferred to and stored in both storage areas, when there is an error signal in the external device, the error data is transferred to the error history data storage area. Data in the buffer storage area and the error history data storage area. The data in the history data storage area, the storage controller of the error signal in the agricultural machine, characterized by controlling so as to newly stored in the buffer storage area and the electrically erasable and writable non-volatile memory. 2. An external device such as a sensor or a setting device provided in a traveling unit, a working unit, an operation unit, or the like of an agricultural work machine, a controller that receives and controls a control signal between the external device, and a memory that can be read and written as needed. And an electrically erasable and writable non-volatile memory. The occasionally readable and writable memory includes a buffer storage area and an error history data storage area. While the error history data in the erasable and writable nonvolatile memory is transferred to and stored in both storage areas, when there is an error signal in the external device, the error data is transferred to the error history data storage area. Data in the buffer storage area and the error history data storage area. The data in the history data storage area is newly stored in the buffer storage area, and when the power of the agricultural working machine is turned off, the controller operates a self-holding circuit to electrically erase and erase the data in the buffer storage area. An error signal storage control device for an agricultural work machine, which controls to turn off the power of the entire controller after storing in a writable nonvolatile memory. 3. The apparatus according to claim 1, wherein the error data is data for identifying each of the external devices.