JPS6331123Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a programmable sequence controller that controls the sequence controller with a programmable loader.

Normally, to create or display a program for a programmable sequence controller, a program loader is electrically connected to the sequence controller main body (hereinafter simply referred to as the controller main body) using a dedicated cable (hereinafter simply referred to as the cable), and then the program is By operating the keys on the loader and/or the controller body, they are also connected in terms of software and can be used.

As mentioned above, since the connection between the program loader and the controller body is electrical, a connection plug and a cable are required.

If the programmable sequence controller is installed in a noisy location, noise may enter from the program loader or cable.
It may cause malfunction.

Furthermore, if the installation space for the programmable sequence controller is narrow, it becomes difficult to freely change the connectors of the program loader and the controller main body when attaching cables.

Furthermore, if you forget to connect or lose the cable when moving the program loader or controller, you may not be able to change the program, so with this in mind, the program loader is built into the controller. If the controller body is installed in a low or high place, programming operations will be difficult to perform, and in dusty locations, dust may get into the programming keys and cause malfunctions.

In addition, since the program loader and controller body are electrically connected, when connecting and disconnecting online, unnecessary pulses may be generated depending on how well the connection is done, making it impossible to completely connect the logic of the program loader and controller body. Otherwise, there is a problem that the software in the controller itself may stop.

This idea was made to solve the above problems, and the purpose is to obtain a programmable sequence controller that is easy to handle by optically coupling the program loader and the controller body. be.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 1, the program loader 1 includes a first light emitting element 2, such as a light emitting diode, which transmits an information signal (optical signal), and a first light receiving element 6, such as a photodiode, which receives an answer back signal. is provided.

It operates from an external power supply via a connector 10 or from a built-in battery 11, and has a keyboard 12 consisting of program keys and control keys, a first display section 13 that displays keyed-in contents, and displays answer back contents. A second display section 14 is provided, and a device 17 such as a cassette tape recorder or ROM unit for inputting a large number of programs simultaneously and continuously is connected as necessary.

On the other hand, the controller body 3 includes a second light receiving element 4 that receives the information signal from the first light emitting element 1.
, a second light emitting element 9 that transmits a hair answer back signal to the first light receiving element 6, and a control unit 15 that controls a sequence control function, a program input function, and other necessary operations. 4 is provided with a light receiving element scanning section 8 for confirming that an information signal has been input. Since this light receiving element scanning section 8 is supplied with power from the power supply section 7 provided on the input side of the power supply circuit 5, it can operate even if the logic of the controller main body 3 stops.

Note that the illustration of the optical signal transmission path is omitted in FIG. 1.

FIG. 2 is a plan view showing the key arrangement of the keyboard. In the figure, an on key 20, an off key 21
is used to turn on and off the power of the controller body 3. When the on key 20 is operated, an information signal indicating power on is sent from the first light emitting element 2 to the second light receiving element 4, and the power of the controller body 3 is turned on. is turned on and the off key 21 is operated, the power to the controller main body 3 is turned off.

When the RUN key 22 is operated, the sequence program of the controller body 3 is started, and when the reset key 23 is operated, the sequence program of the controller body 3 is started.
operation is reset.

When the P-on key 25 is operated, the controller body 3 is placed in a program input mode, and when the P-off key 26 is operated, the controller body 3 is placed in an operation standby mode.

When the relay symbol keys 27, 27, . Since the answer back is performed, the answer back contents are sequentially displayed on the second display section 14.
If you visually check that the displayed contents match, you can confirm that the program was transmitted without error.

When the setting key 28 is operated, the program sent to the controller main body 3 is set in the controller main body 3.

Note that the numeric keypad 29 is used to specify relay and coil numbers, etc., and the address key 30
is used to set information for selecting a specific one of the plurality of controller bodies 3.

Also, the signals are transmitted in a time division multiplex format.

FIG. 3 is a plan view showing an optical signal transmission path connecting the program loader and the controller main body;
In the figure, cable 3 constituting the optical signal transmission line
1 and 31 and the connector 32 are the first light emitting element 2
and the second light receiving element 4, and the second light emitting element 9 and the first light receiving element 6.

Note that when the program loader 1 and the controller body 3 are close, the optical signal transmission path is the optical cable 3.
It can be configured with only 1 and 31.

As described above, according to this invention, the program loader and the controller main body are connected through an optical signal transmission line, and the first display section transmits data to the program loader, and the second display section displays answer back contents.
Since the controller main body is provided with a display section, control and programming of the controller main body can be performed without contacting the controller main body and can be performed from a remote location using a program loader.

Further, by checking the contents of the first and second display sections, it is possible to easily determine whether the setting contents and the program contents match, and it is also possible to easily confirm the contents of the program.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a programmable sequence controller according to an embodiment of this invention.
FIG. 2 is a plan view showing the key arrangement of the keyboard, and FIG. 3 is a plan view showing the optical signal transmission path connecting the program loader and the controller body. In the figure, 1 is a program loader, 2 is a first light emitting element, 3 is a sequence controller main body, 4 is a second light receiving element, 5 is a power supply circuit, 6 is a first light receiving element, 7 is a power supply unit, and 8 is a Scanning section, 9 is the second
10 is a connector, 12 is a keyboard,
13 is a first display section, 14 is a second display section, 15
3 shows a controller section, 31 an optical cable, and 32 an optical connector.

Claims (1)

[Scope of utility model claims] A first light-emitting element, a first light-receiving element, a first display section that displays the contents of an information signal transmitted from the first light-emitting element, and a first display section that displays the contents of the answer back signal received by the first light-receiving element. a program loader provided with a second display section for displaying information, a second light receiving element for receiving an information signal from the first light emitting element, and a second light emitting element for transmitting an answer back signal to the first light receiving element. A programmable sequence controller comprising: a sequence controller body; and an optical signal transmission path connecting the program loader and the sequence controller body.