JPS6267605A - Sequential controller - Google Patents

Abstract

PURPOSE:To standardize circuits and to improve the maintainability and the workability by providing illumination type push button switches with functions which display individual operations continuously. CONSTITUTION:When a push button switch PB-3 is operated, an auxiliary relay D is excited and an indicator lamp LI-6 is lit to display the automatic state. Simultaneously, the completion of start conditions is displayed on an indicator lamp LI-2; and when a push button switch PB-1 is operated after confirming this display, the sequential control is started similarly. The start is displayed by lighting of a lamp LI-1, and timers T1 and T2 are started to display individual advance states on lamps LI-8-LI-11, and the switch PB-3 is switched automatically to the exception side and this switching is displayed when the sequential control is terminated. The sequential control may be started and stopped manually by switches PB-3 and PB-2. Thus, it is unnecessary to use circuits different by sequence and circuits are standardized to improve the maintainability and the workability.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a sequential control circuit in which an illuminated push button switch is provided with a function of continuously displaying each operation and a manual operation function. Regarding equipment.

[Background of the invention]

For example, as a conventional sequential control device,
-13183 has the following drawbacks in terms of maintenance in the control from the start to the completion of a series of automatic circuits, and even in recent plants and self-contained plants, automatic
As the scope of operation becomes wider and there is a trend toward labor saving, the progress status of one circuit is displayed, and there is a demand for improvements in terms of maintainability and one-time inspection.

Disadvantages of the conventional method (a) It is not possible to determine the progress of a series of automatic circuits from the start to the completion.

Mouth) There is no uniformity in the circuit, and there is a lack of compatibility with other systems.

c) Since the pushbutton switches were installed directly on the switchboard, it was not easy to work with, and the arrangement of the panels was not consistent and lacked mesiality.

[Purpose of the invention]

The circuit of the present invention solves the shortcomings of the prior art, and provides a manual operation function in addition to the function of continuously and sequentially displaying the operation progress of multiple control relays in each system and illuminated pushbutton switches. We provide a device for switchboards that is characterized by having a labor-saving effect and is designed with consideration to circuit integrity, uniformity of switchboard surface arrangement, and ease of maintenance9 work. This is what I am trying to do.

[Summary of the invention]

In a sequential control device, the present invention has a function of continuously displaying each operation on an illuminated pushbutton switch, and also has manual operation, and takes into consideration the uniformity of the panel arrangement, and allows operators to perform maintenance, inspection, and maintenance. This is a sequential control device that takes into consideration ease of plant modification.

[Embodiments of the invention]

The present invention will be specifically explained below with reference to FIGS. 1 and 2 below.

FIG. 1 is a sequential control development connection diagram, and FIG. 2 is an operation unit that is a unit of illuminated push button switches.

In Figure 1, A, B, C, D, E, F, G.

H is an auxiliary relay for operation, and Tl and T2 are timers. PBI, PB2. PB3 is an illuminated push button switch (
(Built-in indicator light).

In an automatic control system, push button switch PB-3 is
When operated automatically, auxiliary relay D operates and contact D-3
As a result, the indicator light LI-6 "Automatic" lights up. After confirming that ``Automatic'' is lit, confirm that LI-2 ``Starting condition complete'' is lit, and press Start PB-1 ``Start''. Relay A operates on the condition that starting condition Y-1 is satisfied, and contact A-1 As a result, when the button is held, the display lamp LI-1 "start" of the push button switch is turned on by the contact A-2, and the sequential start is started.

Next, timers T-L and T are activated by starting relay contact A-4.
-2 is activated and the device to be automatically controlled is connected to the auxiliary relay contact F.
-1, G-1.

When the device control is completed, confirmation relay contact Y-3 confirms that the condition is completed, auxiliary relay H operates, and relay contact H-1
As a result, sequencer completion relay C operates, and contact C-2
With this, relay A and 8 circuits are excluded and the operation is completed.

The status of the sequential progress is displayed on indicators LI-8~
It is displayed on LI-11 by the in-progress status contacts x1 to X4.

When this automatic control system sequential circuit is completed,
When pushbutton switch PB-3 is pressed to "exclude", auxiliary relay E operates, D-1 is turned OFF and the circuit is excluded, and at the same time LI-7 "excluded" is displayed by contact E-1.
The series of sequential control circuits ends.

Manual starting and stopping can be started and stopped using PB-1 and PB-2, respectively.

Next, FIG. 2 shows an example in which this device is made into a unit.

〔Effect of the invention〕

In the conventional system, the circuit is configured by combining relay indicators for each sequential system, and there is no uniformity in each system, which places a heavy burden on the operator in terms of maintenance6. Needless to say, this method can be widely applied to general industrial automation circuits including atomic couplants.

In particular, there is a tendency to improve self-payment plans to 6 automation.

This device is also expected to have the effect of making it easier to deal with such problems during operational maintenance and inspection.

[Brief explanation of drawings]

FIG. 1 is a developed connection diagram of a sequential control device according to an embodiment of the present invention, and FIG. 2 is a plan view showing an example of a control unit to which the present invention can be applied.

Claims (1)

[Claims] 1. In a sequential control device, a plurality of control relays in each system and the contacts of an illuminated push button switch are connected in series, and transition commands are sequentially issued for a plurality of operations. Sequence control can be continuously monitored by a circuit that continuously controls operations in sequence, means for displaying on the illuminated push button switch when the sequence can proceed, and means for displaying the operation of each system of the operation command circuit. A sequential control device characterized by: