JP2932536B2 - Electronic cam switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of the Invention> The present invention relates to an automatic beverage filling machine that automatically and continuously injects and fills a beverage such as milk into a bottle. The present invention relates to an electronic cam switch used for controlling the operation of various types of rotary working devices (hereinafter referred to as loads) that are intermittently driven to rotate based on setting contents such as directions.

<Prior art and its problems> In a conventional electronic cam switch, when the output to the load is stopped, the operation ON angle and the operation of the load are determined.
There are two modes: a setting mode for setting the operation contents such as the OFF angle, and an operation mode for controlling the output to the load by comparing the set operation contents with input information from an operation detector such as an encoder mounted on the load. It was configured to be switchable to the mode.

However, in the conventional electronic cam switch as described above, the setting mode for stopping the output to the load and the operation mode for outputting to the load are clearly distinguished, and the setting and the output to the load are simultaneously performed. Since it is not possible to operate the system based on the settings, it is possible to judge the operation status, and if there is a malfunction, change the settings and fine-tune the system operation. However, if there is a malfunction in the operation, there is an inconvenience that the operation must be stopped and the setting must be performed again.

Further, in order to eliminate such inconvenience, it is conceivable to eliminate the distinction between the setting and the operation mode so that the setting and the output to the load can be arbitrarily performed. When a setting key or the like is touched, the setting contents are unexpectedly changed, and there is a high possibility of erroneous output and malfunction.

In addition, depending on the type of load, etc., it may be troublesome to output at the setting stage.In such a case, before connecting to the load, that is, in the state where the load is not connected, When connecting to a load after the setting is completed, there is a problem that a very troublesome handling operation is required.

Conventionally, JP-A-56-85104 or JP-A-58-85104
Japanese Patent Laid-Open No. 29006/1990 discloses a sequence controller having a setting key for switching between a setting mode, a confirmation mode and an execution mode. The technical contents of this controller are disclosed in JP-A-63-113602 or JP-A-63-157686. However, even when the present invention is applied to the electronic cam output device disclosed in Japanese Patent Application Laid-Open Publication No. H10-207, there is a similar problem as in the case described above.

<Object of the Invention> The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to clearly distinguish between a setting mode and an operation mode to prevent erroneous output and malfunction. It is another object of the present invention to provide an electronic cam switch capable of finely adjusting the system operation with a simple operation.

<Configuration and Effect of the Invention> An electronic cam switch according to the present invention provides a setting mode in which only the operation content of a load can be set in a state where output to the load is stopped, and a load mode based on the set operation content. Mode switching means capable of switching between three modes: an operation mode in which the output of the load can be controlled, and a test operation mode in which the settings can be changed while controlling the output to the load based on the settings of the operation details of the load. In the test operation mode, the setting contents are changed in the operating state to enable adjustment of the system operation, and the setting contents are not changed in the operation mode. .

According to the present invention, three modes are distinguished: a setting mode for setting only the operation content of the load, an operation mode for controlling the output to the load, and a test operation mode for changing the setting content while controlling the output to the load. Thus, these three modes can be arbitrarily switched according to the type of load or the like.

Therefore, if you do not want to output at the setting stage, select the setting mode, and without troublesome operation, eliminate unexpected output to the load and perform predetermined setting easily and accurately. In addition to selecting the operation mode during actual operation, even if the setting key is touched accidentally during operation, erroneous output and malfunction due to unexpected changes in the settings are prevented. As a result, operation according to the initial settings can be ensured.

In addition, by selecting the test run mode after the setting is completed, the system is actually operated, and the operation status is judged and confirmed according to the setting contents.If there is a problem, the operation does not stop temporarily. It is possible to fine-tune the system operation by changing the setting contents while keeping the operation state.

Also in the initial setting, by selecting the test operation mode, it is possible to set the actual operation ON angle and OFF angle while checking the positions on the spot.

As described above, according to the present invention, by adding the test operation mode in addition to the setting mode and the operation mode, there is no need for troublesome operations such as re-setting and switching between connection and disconnection to and from the load. In addition, there is an effect that it is possible to easily and quickly perform a predetermined setting without causing erroneous output and malfunction.

<Description of Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of an electronic cam switch according to the present invention, and FIG. 2 is a front view. In each of these figures, reference numeral 1 denotes a cam switch main body, and a plurality of input / output terminals 2 and an encoder connection on its back. Connector 3 and an LCD display screen 4 on the front.
A large number of key switches are arranged on the side and the lower side of the CD display screen 4.

The connector 3 is connected to an absolute type encoder 5 having a resolution of 256. The encoder 5 is attached to a rotating shaft of a load 6.

The key switch group includes a mode switching switch 7 for switching among three modes, a setting mode PRG, a test operation mode TST, and an operation mode RUN; a teach mode TCH for setting a setting mode according to the actual operation of the load 6; A setting mode designation switch 8 for manually switching to the manual mode MAN by angle setting;
Function switching switch 9 for switching the rotation direction and switching the rotation speed between high and low, displaying 0-255 / revolution and 0
359 ゜ / 256/360 switch 10 for switching rotation display
And + and-angle keys for incrementing and decrementing the angle value in the manual setting mode MAN.
11A and 11B, an origin specifying key 12 for setting an arbitrary angular position of the load 6 to the origin, that is, 0, an erasing key 13 for erasing all the set contents, and a set key 14 for setting the set contents.
ON / OF to select and specify ON angle and OFF angle
F key 15, step keys 16 for selecting and specifying the operation steps STP1 and STP2 of the multi-channel, specifically 8-channel cam numbers, and cam for selecting and specifying the cam numbers
It consists of a No. key 17 and a confirmation key 18 for calling the setting contents on the LCD display screen 4 for confirmation.

As shown in FIG. 3, a PR screen is displayed on the LCD display screen 4 in accordance with the input operation for each key switch group.
Mode display section 7a that displays one of the setting modes of G, TST, and RUN, setting mode display section 8a that displays one of the setting modes of TCH and MAN, and a display angle display section that displays the display angle of 256/360 10a, angle display 11a that displays the current angle, STP
1, an operation step display section 16a that indicates which operation step is STP2, a setting cam number display section 17a that displays cam numbers 1 to 8 selected at the time of setting, and 1 to 1 in the output state in the operation mode. Output cam N that displays the cam number of 8
o. Display section 19a, when the setting of ON angle and OFF angle is completed and the set values are confirmed by pressing the set key 14, and when the setting contents are called by pressing the confirmation key 18, the set ON angle and OFF angle are set. The output timing angle display section 14A includes an ON angle display section 14a1 and an OFF angle display section 14a2 that respectively display
, A set value display section 20a1 for illuminating the display, a current value display section 20a2 for illuminating and displaying the PV in the operation mode, an ON angle display section 14a1 and an OFF angle display section 14 of the output timing angle display section 14A.
a2 has a display section of a flashing timing rising arrow symbol 15a1 and a falling arrow symbol 15a2 respectively corresponding to a2, and displays the rotation angle position, rotation direction, rotation speed as a guide. The display monitor 21 is configured to project.

FIG. 4 is a block diagram showing the system configuration of the above-mentioned electronic cam switch. In FIG. 4, reference numeral 22 denotes a one-chip switch.
The microcomputer is provided with a ROM 22A, a RAM 22B, and an LCD driver 22C. Reference numeral 23 denotes an input circuit, which is supplied with rotation angle information transmitted from the encoder 5 via the encoder connection connector 3 and supplied from the power supply circuit 24 via the constant voltage circuits 25A and 25B.
The voltages of 2V and 5V are input to the microcomputer 22.

A reset circuit 26 receives the detection information of the power failure detection circuit 27 and inputs a reset signal to the microcomputer 22. 28 is a backup battery, 29 is a system clock generation circuit,
An LCD reference potential generating circuit 30 supplies a backup power source, a system clock, and an LCD reference potential to the microcomputer 22.

Reference numeral 31 denotes an output circuit which stops output in the setting mode PRG and load 6 in the operation mode RUN and the test operation mode TST.
And outputs the control signal as set. Reference numeral 7 denotes the above-described mode switching switch, and reference numeral 8 denotes a setting mode designation switch for inputting mode switching information and setting mode setting information to the microcomputer 22.

Reference numeral 32 denotes a key switch for program setting.This key switch 32 is the function switching switch 9, the 256/360 switching switch 10, the angle keys 11A and 11B, the origin specification key 12, the set key 14, the ON / OFF key 15, the step key 16, It represents the cam No. key 17 and the like. 33A is a backlight LED for the LCD display screen 4, and 33B is a drive circuit for lighting it.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. 5, focusing on the processing flow in the microcomputer 22 to which the mode switching information by the mode switching switch 7 has been input.

When the mode switching information is input by the mode switching switch 7, first, it is determined whether or not the input information is in the setting mode (step S30). If the judgment result is Yes, the selection of the cam No. by the cam No. key 17 and the selection of the operation step by the step key 16 ON by the ON / OFF key 15
/ OFF angle display selection, angle keys 11A and 11B and set key 1
The ON / OFF angles are set on the LCD display screen 4 by the user and displayed on the LCD display screen 4, and the input processing of the setting contents such as the setting of the rotation direction and the rotation speed by the function switching switch 9 is performed (step S31), and the setting is completed. It is determined whether or not (Step S32). In step S31, the output to the load 6 is stopped.

If the result of the determination in step S32 is Yes and if the result of the determination in step S30 is No, it is next determined whether or not the operation mode is the test operation mode (step S33). If the determination result is Yes, the input processing of the set contents is performed in the same manner as described above (step S34), and the output is performed while comparing the set contents with the actual operation information of the load 6 such as the input angle from the encoder 5. The output is controlled via the circuit 31 so that the load 6 operates according to the set contents (step S3).
Five).

At this time, it is determined from the operating condition of the load 6 whether or not the load 6 is operating as set. If there is a problem in the operating condition, the setting is changed in step S34 to fine-tune the operation. Is performed, and it is finally determined whether or not the settings as specified are completed (step S36).

If the result of the determination in step S36 is Yes and if the result of the determination in step S33 is No, it is next determined whether or not the operation mode is set (step S37). The judgment result is Y
In the case of es, the output is output to the load 6 via the output circuit 31 while comparing the final setting contents with the actual operation information of the load 6 input from the encoder 5 to control the operation state according to the setting contents. (Step S38). On the other hand, if the decision result in the step S37 is No, the process returns to the step S30 to repeat the above operation.

In the above embodiment, in order to reduce the cost of the entire system, an encoder having a resolution of 256
According to the table, it is configured to use the 256/360 switching switch 10 which can convert the data of 0 to 255 to the data of 0 to 359 matching the human sense, output and display, An encoder with a resolution of 360 may be used.

In addition, when the test operation mode is selected, if the rotation speed of the load 6 is automatically switched to a low speed, the effect that the test operation operation can be performed more safely and accurately can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an example of an electronic cam switch according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is an enlarged front view of a display device, and FIG. FIG. 5 is a flowchart showing the three-mode selection operation. 6… Load, 7… Mode switching switch, 11A, 11B…
Angle key, 14 …… Set key, 15 …… ON / OFF key, 17…
... Cam No. key, 22 ... Microcomputer.

Claims (1)

(57) [Claims] A setting mode in which only the operation content of the load can be set in a state in which output to the load is stopped; an operation mode in which output to the load can be controlled based on the set operation content; And a mode switching means capable of switching between three modes of a test operation mode in which the setting contents can be set while controlling the output to the load based on the setting of the operation contents of the operation mode. An electronic cam switch characterized in that the settings are changed to enable adjustment of the system operation and that the settings are not deflected in the operation mode.