JP5027769B2 - Work machine substrate - Google Patents

Description

  The present invention includes a first control state that operates based on a control program corresponding to a work machine of the first specification model, and a second control state that operates based on a control program corresponding to a work machine of the second specification model. The present invention relates to a work machine substrate including a switchable control unit.

Patent Document 1 describes a printed circuit board assembly 1 having a product number display device.
The printed board assembly 1 includes a printed board 2 and various electronic components 3 mounted on the printed board 2. As the printed circuit board 2, a common symbol, resist, circuit pattern, mold, etc. is used regardless of differences in product destinations, users, etc., and circuit constants are changed by mounting electronic components and the like.
The product number display device includes product number notations 7 to 10 provided on the surface of the printed circuit board 2, and a pair of insertion holes 7a, 7b, 8a, 8b, and 9a provided in close proximity to each product number notation 7-10. , 9b, 10a, 10b, and conductor patterns 7c, 7d, 8c, 8d, 9c derived from the periphery of the respective insertion holes 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b on the back surface side of the printed circuit board 2. , 9d, 10c, 10d, and one jumper wire 11.
The jumper wire 11 is inserted into a pair of insertion holes 8a and 8b corresponding to the product number notation portion 8 representing the product number of the printed circuit board 2 itself. The jumper wire 11 is soldered to the conductor patterns 8c and 8d.
While the resistance value between the three conductor patterns 7c, 7d, 9c, 9d, 10c, and 10d to which the jumper wire 11 is not inserted is infinite, the jumper wire 11 is inserted and electrically short-circuited. The resistance value between the set of conductor patterns 8c, 8d becomes zero. The product number can be electrically read by detecting a pair of check pins whose resistance value is zero. (Each symbol is described in the publication.)

Patent Document 2 describes a control board 2 and a temperature control board 3 for a refrigerator.
The temperature control board 3 includes a second microcomputer 7 and a specification change input unit 8. The specification change input unit 8 is configured by connecting a power source 9 to a port of the second microcomputer 7 via substrate patterns 8a to 8c.
The second microcomputer 7 recognizes the presence / absence states of the substrate patterns 8a to 8c based on the input voltage of each port.
The first microcomputer 4 of the control board 2 is programmed to switch the control method of the refrigerator according to the selection result of the specification change input unit 8. When the board pattern 8a is connected, the first microcomputer 4 sets the temperature of the refrigerator 12 to the set temperature selected by the switch 5 of the temperature control board 3, and when the board pattern 8a is cut, the switch 5 Decrease C by 1 degree with respect to the set temperature selected in. (Each symbol is described in the publication.)

JP-A-5-275815 JP 2008-25944 A (paragraphs [0008]-[0011], FIGS. 2, 3 and 4)

  For example, in a tractor, a work machine substrate corresponding to a model with a rolling specification that connects a work device in a freely rolling manner, and a work machine substrate that supports a non-rolling specification model that connects a work device so that it cannot be rolled are obtained. In this case, if a common control unit is adopted for a model with rolling and a model without rolling, it can be advantageously obtained in terms of economy.

  In this case, when the control unit is equipped with a control program corresponding to a model with rolling specification and a control program corresponding to a model without rolling, and the control unit is mounted on a board insulator, the control unit , Input mounting information from the information means provided on the board insulator, determine whether it is mounted on the board insulator corresponding to the model with the rolling specification or the model without the rolling specification, and the specification with rolling If it is determined that it is mounted on a board insulator compatible with the model, the control state is switched to operate based on the control program corresponding to the model with rolling, and the board insulator compatible with the model without rolling. If it is determined that it has been installed, the control state is switched to operate based on the control program corresponding to the non-rolling model. Nau to configure.

If the above-described conventional technique is employed to make the control unit determine the mounting state, the control unit may be expensive.
That is, when the conventional technique is adopted, it is necessary to link the input port of the control unit to the jumper line or the substrate pattern so that the control unit inputs mounting information from the jumper line or the substrate pattern. For this reason, even if the control unit has a plurality of input ports, all input ports are used for the control function that the control unit has, and there is no input port that can be used to input the mounting information. In some cases, it is necessary to prepare a control unit having a large number of input ports so that an input port used for input can be secured.

  An object of the present invention is to provide a work machine substrate that allows a control unit to determine a mounting state without providing the control unit with an input port dedicated to mounting information.

The first invention includes a first control state that operates based on a control program corresponding to a work machine of the first specification model, and a second control state that operates based on a control program corresponding to a work machine of the second specification model. In a work machine board equipped with a control unit that can be switched between
When the circuit component corresponding to the first specification model is mounted, the control target is controlled so that the control unit of the control target unit in the work machine of the first specification model performs control in the first control state. A first specification circuit configured to link the control unit with the control unit and output mounting information to the control unit indicating that it is in a first mounting state corresponding to the working machine of the first specification model, When a circuit component corresponding to the second specification model is mounted, a second specification circuit that outputs mounting information indicating that the second mounting state corresponding to the work machine of the second specification model is in the control unit is provided. Ri Oh comprises a wiring pattern portion comprising the configuration state,
In the state where the wiring pattern portion is configured in the first specification circuit, the output port of the control portion is switched to the input port by switching on the power supply of the control portion, and is in the first mounting state. After mounting information is input, the output port of the control unit is returned to the original output port, the output port and the control target unit are linked, and the control unit controls the control target unit. And
In the state where the wiring pattern unit is configured as the second specification circuit, the control unit is switched on to switch the output port of the control unit to the input port, and the second mounting is performed at the input port. It is configured to input implementation information indicating that it is in a state.

According to the configuration of the first aspect of the present invention, when the circuit component corresponding to the first specification model is mounted on the wiring pattern portion, the wiring pattern portion is in a state of configuring the first specification circuit and is in the first mounting state. Is output to the output port of the control unit by the first specification circuit, the control unit switches to the first control state based on the mounting information from the first specification circuit, and the control unit and the first specification model The control target unit in the work machine is linked with the first specification circuit, and the control target part in the work machine of the first specification model is controlled by the control unit in the first control state corresponding to the first specification model.
When a circuit component corresponding to the second specification model is mounted on the wiring pattern portion, the wiring pattern portion is in a state of constituting the second specification circuit, and the mounting information indicating that the circuit is in the second mounting state is displayed in the second specification circuit. Is output to the output port of the control unit, the control unit switches to the second control state based on the mounting information from the second specification circuit, and the control target unit in the work machine of the second specification model is Control is performed in the second control state corresponding to the two specification models.

  Therefore, the mounting information can be input to the control unit from the output port of the control unit for linking the control unit and the control target unit of the first specification model, and the control unit can determine the mounting state. It is possible to obtain a work board that allows the control unit to determine the mounting state and perform appropriate control at low cost without providing the control unit with an input port for mounting information input.

  When the power source of the control unit is switched on, the control unit inputs the mounting information and determines the mounting state, so that the control unit switches to the first control state or the second control state. However, it is possible to perform control in an appropriate control state corresponding to the working machine of the first specification model or the second specification model equipped with the control unit at the time of work without providing the storage means for storing in the control unit. .

Therefore, even if any working machine of the first specification model and the second specification model is equipped, appropriate control corresponding to the work machine can be performed, but a storage means for that purpose is not provided. It is possible to obtain a work machine substrate that is inexpensive.
In a further characteristic configuration of the first invention, the wiring pattern portion outputs mounting information indicating that the wiring pattern portion is in the second mounting state with power from a connected power source in a state where the second specification circuit is configured. In the state where the first specification circuit is configured, it is not connected to the power source.
According to a further characteristic configuration of the first aspect of the present invention, in the state where the wiring pattern portion is configured in the first specification circuit, a rolling cylinder that performs rolling control of a rotary tiller is provided as the control target portion.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic plan view of a working machine substrate 1 according to an embodiment of the present invention. As shown in this figure, a work machine substrate 1 according to an embodiment of the present invention includes a substrate insulator 2, a control unit 3 provided on one side surface of the substrate insulator 2, and the substrate insulator 2. Wiring pattern portion 4 printed on one side, inclination sensor circuit portion 5 having input port 5a, tillage sensor circuit portion 6 having input port 6a, and stroke sensor circuit portion having input port 7a 7, a lifting operation circuit unit 8 having an output terminal 8a, and a lift sensor circuit unit 9 having an input port 9a.

  The working machine substrate 1 is mounted on a working machine 10 having a lifting specification and a rolling specification as a working machine of the first specification model (refer to FIG. 5, hereinafter referred to as a lifting and rolling specification machine 10). Thus, the lifting / rolling control and the rolling control of a working device such as a rotary tiller 20 (see FIG. 5) connected to the lifting / rolling specification machine 10 are performed, or the lifting / lowering specification as a working machine of the second specification model is performed. A rotary tiller 20 (see FIG. 6) that is mounted on the working machine 11 (see FIG. 6, hereinafter referred to as the lifting / lowering machine 11) that is connected to the lifting / lowering machine 11. Elevating and lowering the work device such as

  FIG. 2 is a plan view of the wiring pattern portion 4. As shown in the figure, the wiring pattern portion 4 includes a first printed wiring 31 having one end connected to the output port 3a of the control unit 3 and a first printed wiring 31 having one end close to the other end of the first printed wiring 31. Two printed wirings 32, a third printed wiring 33 having an intermediate portion connected to an intermediate portion of the second printed wiring 32, a fourth printed wiring 34 having one end close to one end of the third printed wiring 33, A fifth printed wiring 35 having one end proximate to the other end of the second printed wiring 32; a sixth printed wiring 36 having one end proximate to one end of the fifth printed wiring 35 and the other end of the second printed wiring 32; The sixth printed wiring 36 is provided with a seventh printed wiring 37 whose one end is close to the other end of the sixth printed wiring 36.

  The other end of the fourth printed wiring 34 is connected to a power source 40 provided on the substrate insulator 2. The power supply 40 is configured to include a power supply IC, and outputs 5V DC power from a 12V power supply (not shown) formed of a battery provided in the lift / rolling specification machine 10 and the lift specification machine 11. The other end of the fifth printed wiring 35 is connected to a ground pattern 41 printed on the substrate insulator 2. The other end of the seventh printed wiring 37 is connected to an output terminal 42 provided on the substrate insulator 2 via an output electronic element or the like.

  FIG. 3A is a plan view of a state in which a rolling specification circuit R as a first specification circuit of the wiring pattern portion 4 is configured. As shown in this figure, the wiring pattern portion 4 includes three resistors 43, 45, 46, one capacitor 47, one transistor 48, etc. as circuit components corresponding to the rolling specifications of the lifting and rolling specification machine 10. Is mounted, the rolling specification circuit R is configured.

  Of the three resistors 43, 45, 46, the resistor 43 is mounted across the first printed wiring 31 and the second printed wiring 32, and the resistor 45 includes the third wiring pattern 33 and the fifth wiring pattern 35. The resistor 46 is mounted over the sixth wiring pattern 36 and the seventh wiring pattern 37. The capacitor 47 is mounted across the third wiring pattern 33 and the fifth wiring pattern 35. The transistor 48 is mounted across the second wiring pattern 32, the fifth wiring pattern 35, and the sixth wiring pattern 36.

  The wiring pattern portion 4 in the state in which the rolling specification circuit R is configured is configured such that the output terminal 42 is electromagnetic in the operation valve 12a (see FIG. 7) of the rolling cylinder 12 (see FIG. 7) provided in the lifting and rolling specification machine 10. By being linked to the operation unit via an electric cable, the output port 3a of the control unit 3 and the rolling cylinder 12 are linked, and the control unit 3 controls the rolling cylinder 12.

  When the output port 3a of the control unit 3 is switched to the input port, the wiring pattern unit 4 in the state in which the rolling specification circuit R is configured is insulated by the control unit 3 in a state corresponding to the lifting and rolling specification machine 10. The low signal Lo as the mounting information indicating that it is mounted on the body 2 (corresponding to the first mounting state) is output to the output port 3a.

  When the wiring pattern portion 4 is used for output of other control different from rolling control, a light emitting diode is interposed in the seventh printed wiring 37, etc. other than the circuit components 46, 47, 48 described above. Circuit parts may also be interposed.

  FIG. 3B is a plan view of the wiring pattern portion 4 in a state in which a lifting / lowering specification circuit UD serving as a second specification circuit is configured. As shown in this figure, the wiring pattern portion 4 is in a state where a lift specification circuit UD is configured by mounting two resistors 43 and 44 as circuit components corresponding to the lift specification machine 11.

  Of the two resistors 43, 44, the resistor 43 is mounted across the first printed wiring 31 and the second printed wiring 32, and the resistor 44 extends across the third printed wiring 33 and the fourth printed wiring 34. Implement. The resistor 43 corresponding to the elevator specification machine 11 and the resistor 43 corresponding to the elevator / rolling specification machine 10 have the same resistance value, and the elevator specification machine 11 and the elevator / rolling specification machine 10 have the same resistance value. It is a common resistor. A configuration in which the resistor 44 is disposed between the fourth printed wiring 34 and the first printed wiring 31 and the resistor 43 is not mounted may be employed.

  When the output port 3a of the control unit 3 is switched to the input port, the wiring pattern unit 4 in the state in which the lift specification circuit UD is configured is changed to the substrate insulator 2 in a state where the control unit 3 corresponds to the lift specification machine 11. A high signal Hi as mounting information indicating that it is mounted (corresponding to the second mounting state) is output to the output port 3a.

  The control unit 3 includes a control microcomputer, and includes a lift control program, a rolling control program, and a control state switching control program.

  FIG. 4 is a flowchart when the control unit 3 operates based on a control state switching control program. As shown in this figure, when the power of the control unit 3 is switched on, the control unit 3 switches the output port 3a to an input port and inputs mounting information from the wiring pattern unit 4. When the low signal Lo as the mounting information from the wiring pattern unit 4 is input, it is determined that it is mounted on the board insulator 2 corresponding to the lifting and rolling specification machine 10, and then the output port 3a is changed to the original output port. Return to. When the control unit 3 determines that it is mounted on the substrate insulator 2 corresponding to the lifting and rolling specification machine 10, the control unit 3 switches to the first control state based on the determination result, and the lifting control program and the rolling control program Operates on the basis of When the control unit 3 receives the high signal Hi as the mounting information from the wiring pattern unit 4, the control unit 3 determines that it is mounted on the board insulator 2 corresponding to the lifting specification machine 11, and the second is based on the determination result. It switches to the control state and does not operate based on the rolling control program, but operates based on the lift control program.

  FIG. 5 is a side view of the lifting / rolling specification machine 10. As shown in this figure, the lifting / rolling specification machine 10 includes a mission case 14 that constitutes the rear part of the self-propelled machine and a link mechanism 15 having the rolling cylinder 12.

  The transmission case 14 includes the elevating cylinder 13 and supports the rear wheels 17 so as to be driven.

  The link mechanism 15 includes the rolling cylinder 12, a pair of left and right lift arms 15 a and 15 a supported on the upper part of the mission case 14 so as to be swingable up and down, and swingable up and down on the lower part of the mission case 14. A pair of left and right lower links 15b, 15b supported on the top, a top link 15c supported by a rear portion of the transmission case 14 via a stay 18, and a left lift arm 15a and a left lower link 15b. And an elevating rod 15d for connecting the two. The rolling cylinder 12 connects a right lift arm 15a and a right lower link 15b.

The link mechanism 15 includes a stroke sensor 19 (see FIG. 7) linked to the rolling cylinder 12 and a lift sensor 15e (see FIG. 7) linked to the lift arm 15a.
The stroke sensor 19 is composed of an expansion / contraction type potentiometer, and detects the expansion / contraction length of the rolling cylinder 12. The lift sensor 15 e is a rotary potentiometer, and detects the tilt angle of the lift arm 15 a as the tilt angle of the link mechanism 15.

  That is, the lifting / rolling specification machine 10 connects a work device such as a rotary tiller 20 to the mission case 14 via the link mechanism 15. Hereinafter, description will be made assuming that the rotary tiller 20 is connected.

  In the lifting / rolling specification machine 10, when the lifting / lowering cylinder 13 is expanded / contracted, the lifting / lowering cylinder 13 swings the pair of left and right lift arms 15 a and 15 a to move the link mechanism 15 up and down with respect to the transmission case 14. The rotary tiller 20 is moved up and down by swinging.

  When the rolling cylinder 12 is extended and contracted, the lifting / rolling specification machine 10 swings the right lower link 15b up and down with the right lift arm 15a as a reaction point by using the rolling cylinder 12, thereby moving the left and right lower Flexibility provided by a connector that connects the links 15a and 15a to the mission case 14 and the rotary tiller 20, and a function provided by a connector that connects the top link 15c to the stay 18 and the rotary tiller 20 As a result, the rotary tiller 20 is rolled by moving the right end of the rotary tiller 20 up and down with the left end as a fulcrum.

  The rotary tilling device 20 includes a rotor cover 22 that covers the rear of the tilling rotor 21 and a tilling depth sensor 23 that is linked to the rotor cover 22. The lower end side of the rotor cover 22 is grounded after tilling, and when the tilling depth by the tilling rotor 21 changes due to the forward / backward inclination of the body of the self-propelled machine, the rotor cover 22 swings up and down with respect to the tilling device body. Thus, the tilling depth sensor 23 detects the vertical swing angle of the rotor cover 22 as the tilling depth. The tilling depth sensor 23 is constituted by a rotary potentiometer.

  FIG. 6 is a side view of the lifting specification machine 11. When the elevator specification machine 11 and the elevator / rolling specification machine 10 are compared, in the elevator specification machine 11, the right lift arm 15a and the right lower link 15b are connected by the elevator rod 15d, and the tilt sensor 16 is connected. The lift specification machine 11 and the lift / rolling specification machine 10 have different configurations in this respect, and the lift specification machine 11 and the lift / rolling specification machine 10 have the same structure in other respects. Yes.

  FIG. 7 is a block diagram in a state where the work machine substrate 1 is mounted on the lifting and rolling specification machine 10. The wiring pattern unit 4 constitutes either the rolling specification circuit R or the lifting / lowering specification circuit UD by determining the presence / absence of the resistors 43, 44, 45, 46, the capacitor 47, and the transistor 48 in the wiring pattern unit 4 by a product number label or the like. It is determined whether or not it is in a state, and the working machine substrate 1 in which the wiring pattern portion 4 constitutes the rolling specification circuit R is mounted on the lifting / rolling specification machine 10. As shown in FIG. 7, the work machine substrate 1 links the output terminal 8 a of the lifting / lowering operation circuit unit 8 to the operation valve 13 a of the lifting / lowering cylinder 13, and rolls the output terminal 42 of the wiring pattern unit 4 as a control target unit. The stroke sensor circuit unit is linked to the operation valve 12a of the cylinder 12, the input port 5a of the tilt sensor circuit unit 5 is linked to the tilt sensor 16, the input port 6a of the tilling depth sensor circuit unit 6 is linked to the tilling depth sensor 23, and 7 is connected to the throttle sensor 19, and the input port 9a of the lift sensor circuit 9 is linked to the lift sensor 15e.

  When the working machine substrate 1 is mounted on the lifting / rolling specification machine 10, the control unit 3 is turned on when the engine start switch device is operated to turn on the power. Then, the work machine substrate 1 switches the output port 3a of the control unit 3 to the input port and inputs the mounting information (low signal Lo) from the wiring pattern unit 4 to the control unit 3, and the control unit 3 is in the first control state. The state is switched to (operating based on the lifting control program and the rolling control program) and the output port 3a is returned to the output port to cause the control unit 3 to perform the lifting control and the rolling control of the rotary tiller 20.

  That is, the plowing depth detected by the plowing depth sensor 23 is input to the control unit 3 via the plowing depth sensor circuit 6, and the control unit 3 sets the control target stroke of the elevating cylinder 13 based on the detected plowing depth. An operation signal corresponding to the target stroke is output to the operation valve 13a via the elevating operation circuit 8, and the operation valve 13a is operated to operate the elevating cylinder 13, and the detection of the link mechanism 15 is detected by detection information from the lift sensor 15e. While detecting the moving angle, the link mechanism 15 is moved up and down so that the detected plowing depth becomes the set plowing depth.

  The inclination angle detected by the inclination sensor 16 is input to the control unit 3 via the inclination sensor circuit 5, and the control unit 3 sets the control target expansion / contraction length of the rolling cylinder 12 based on the detection inclination angle. An operation signal corresponding to the length is output to the operation valve 12a via the rolling specification circuit R formed of the wiring pattern portion 4 and the operation valve 12a is operated to set the set control target expansion / contraction length and the detection result by the stroke sensor 19. The rolling cylinder 12 is operated so as to match, and the right lower link 15b is moved up and down so that the right and left tilt angle of the rotary tiller 20 becomes the set tilt angle.

  FIG. 8 is a block diagram in a state in which the work machine substrate 1 is mounted on the lift specification machine 11. As described above, it is determined whether the wiring pattern portion 4 is in the state of the rolling specification circuit R or the lifting specification circuit UD, and the wiring pattern portion 4 is in the state of forming the lifting specification circuit UD. The machine substrate 1 is mounted on the elevator specification machine 11. As shown in FIG. 8, the work machine substrate 1 links the output terminal 8 a of the lifting operation circuit unit 8 to the operation valve 13 a of the lifting cylinder 13, and connects the input port 6 a of the tilling depth sensor circuit unit 6 to the tilling depth sensor 23. And the input port 9a of the lift sensor circuit unit 9 is linked to the lift sensor 15e to be in the mounted state.

  When the working machine substrate 1 is mounted on the elevator specification machine 1, the control unit 3 is turned on when the engine start switch device is operated to turn on the power. Then, the work machine board 1 switches the output port 3a of the control unit 3 to the input port, inputs the mounting information (high signal Hi) from the wiring pattern unit 4 to the control unit 3, and puts the control unit 3 in the second control state. The control unit 3 is controlled to move up and down the rotary tiller 20 by switching to a state in which the operation based on the program for the lifting control is not performed based on the program for the rolling control.

  That is, the plowing depth detected by the plowing depth sensor 23 is input to the control unit 3 via the plowing depth sensor circuit 6, and the control unit 3 sets the control target stroke of the elevating cylinder 13 based on the detected plowing depth. An operation signal corresponding to the target stroke is output to the operation valve 13a via the elevating operation circuit unit 8 and the operation valve 13a is operated to operate the elevating cylinder 13, and the detection information of the lift sensor 15e is used to detect the link mechanism 15. While detecting the swing angle, the link mechanism 15 is moved up and down so that the detected working depth becomes the set working depth.

[Another Example]
Instead of the work machine substrate of the above-described embodiment, the work machine is mounted on a work machine having a hydrostatic continuously variable transmission that changes the driving speed of the traveling device, and the static is based on the detection result of the operation position of the shift operation lever. The hydraulic continuously variable transmission is configured to perform a shift operation, or is mounted on a work machine having a transmission that is changed by changing the clutch to change the driving speed of the traveling device, and the operation position of the transmission lever is changed. The present invention can also be applied to a work machine substrate that is controlled by various devices other than the lifting and rolling cylinders and the rolling cylinder, such as a work machine substrate configured to shift the transmission based on the detection result.

Schematic plan view of work equipment substrate Plan view of wiring pattern (A) is a plan view in a state where a rolling specification circuit of a wiring pattern portion is configured, and (b) is a plan view in a state where a lifting specification circuit of a wiring pattern portion is configured Flow chart of control state switching control of control unit Side view of lifting and rolling specification work machine Side view of lifting machine Block diagram with the work equipment board mounted on a lift / rolling work machine Block diagram with the work equipment board mounted on a lifting machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Control part 4 Wiring pattern part 10 Working machine 11 of 1st specification model Action machine 12 of 2nd specification model Control object part 43,44,45,46,47,48 Circuit component R 1st specification circuit UD 2nd specification circuit

Claims (3)

A first control state for operating a control program corresponding to the working machine of the first specification model based, freely control switching a control program corresponding to the working machine of the second specification model and a second control state which operates based on A working machine substrate having a portion,
When the circuit component corresponding to the first specification model is mounted, the control target is controlled so that the control unit of the control target unit in the work machine of the first specification model performs control in the first control state. A first specification circuit configured to link the control unit with the control unit and output mounting information to the control unit indicating that it is in a first mounting state corresponding to the working machine of the first specification model, When a circuit component corresponding to the second specification model is mounted, a second specification circuit that outputs mounting information indicating that the second mounting state corresponding to the work machine of the second specification model is in the control unit is provided. Ri Oh comprises a wiring pattern portion comprising the configuration state,
In the state where the wiring pattern portion is configured in the first specification circuit, the output port of the control portion is switched to the input port by switching on the power supply of the control portion, and is in the first mounting state. After mounting information is input, the output port of the control unit is returned to the original output port, the output port and the control target unit are linked, and the control unit controls the control target unit. And
In the state where the wiring pattern unit is configured as the second specification circuit, the control unit is switched on to switch the output port of the control unit to the input port, and the second mounting is performed at the input port. A work machine board configured to input mounting information indicating that the machine is in a state . In the state where the second specification circuit is configured, the wiring pattern unit outputs mounting information indicating that the power supply is connected to the second mounting state, and configures the first specification circuit. The work machine substrate according to claim 1, wherein the work machine substrate is not connected to the power source in a state in which the work machine is connected . 3. The work machine substrate according to claim 1, wherein, in a state where the wiring pattern portion is configured in the first specification circuit, a rolling cylinder that performs rolling control of a rotary tiller is provided as the control target portion.

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