JPS6011652B2 - General control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a general control device, and particularly to a general control device for a conveyor for transporting coal, raw materials, etc.

Conventionally, there has been a device of this type as shown in FIG.

In the figure, 1 is a normally open type movement check pusher switch, 2 is a lotus motion changeover switch that selects interlock operation, and 3 is a signal from the interlock check pusher switch 1 and a signal from the lotus changeover switch 2. 4 is a movement check signal established by the output of AND circuit 3 (indicated as a memory signal in the figure), 5 is a signal established by completion of operating conditions, and 6 is a constant signal. 7 is an AND circuit of the signal from the final changeover switch 2, the operating condition completion signal 5, and the signal from the start pusher switch 6; 8 is a normally closed operation stop pusher switch; 9 is a NOR circuit that summarizes the operation stop conditions using the operation condition completion signal 5, the operation changeover switch 2, and the operation stop pushbutton switch 8; 10 is an activation circuit that indicates that the activation of a series of devices has been completed; a completion signal; 11 is an OR circuit between this startup completion signal 10 and the output signal of the NOR gate 9; 12 is a flip-flop whose input signals are the output signal of the AND circuit 7 and the output signal of the OR circuit 9; its output signal is the startup signal; (hereinafter, the start signal is referred to as 8), and 13 are run/stop signals that are generated by the start signal of the flip-flop 12 and continue until the run stop signal from the NOR circuit 9 is generated (hereinafter, run'stop signal). is a flip-flop that generates 13). In addition, 14 is a central main circuit constituted by these. This central master circuit 14 further includes a central independent operation changeover switch 28 and a relay RI for putting each device on standby in the on-site operation state. Switch 28 and switch 2 are turned on alternately. Furthermore, 15 is an interlock pre-stage device signal, 16 is a start signal 12, a run/stop signal 13, a pre-stage device signal 15, and a failure signal from a normally closed point re of a failure relay RE installed in a field circuit 36, which will be described later. The AND circuit 17 outputs the pre-equipment signal 15, the run/stop signal 13, and the operation confirmation signal from the normally open contact 88-1 of the primary switch 88 that controls on/off the electric motor installed in the field circuit 36. AND circuit with the failure signal from closed contact re, 18 is an OR circuit of AND circuits 16 and 17, and its output signal is interlocking operation output signal 19
What drives the next contact 19-1, 20 is a flicker signal (blinking signal), 21 is an inverted signal of the operation confirmation signal from the normally open contact 88-1, an inverted signal of the failure signal from the normally closed contact re, and the flicker signal 22 is a motion selection switch for each motor, 23 is an AND circuit between the interlock check signal 4, the failure signal, and the signal from the interlock selection switch 22, and 24 is an operation confirmation signal and the output signal of the AND circuit 21. and the output signal of the AND circuit 23, and the output signal becomes the display output signal 25 to operate the contact 25-1.

Incidentally, these constitute a motor unit circuit 26 as shown in the figure. In the field circuit 36, the contact 19-
1, the motion selection switch 22a, the coil of the primary switch 88, and a failure detection contact 27 for detecting overload of a thermal relay, etc. are connected between the power supplies, and furthermore, the contact 19-
1 and the interlock selection switch 22a (which is driven at the same time as the switch 22), the field single selection switch 29 (which is turned on after the central single selection switch 28 is turned on) and the central switch 28 closed. The series body of the contact rl of RI which is activated by the switch 301 is connected in parallel with the contact rl, so that the changeover switch 301 can be switched between the switches 22a and 29.

Further, when a failure occurs, the failure detection contact 27 moves to the failure relay RE side as shown in the figure. On the other hand, the contact 25-1 activated by the display output signal 25 is connected to the indicator light L.
lights up. Alternatively, the normally open contact 88-1 is closed by the operation of the primary switch 88, and the indicator light L is turned on. Note that the push-down switches 1, 6, and 8, the switches 2 and 22, and the contacts 88-1 and re are each connected to a power source.

Next, the operation of the conventional overall control device shown in FIG. 1 will be explained.

When performing overall control of a large number of conveyors, etc., first, an interlock check signal 4, a start signal 8, and a run/stop signal 13 are generated in the central main circuit 14 and supplied to the motor unit circuit 26 for each device.

When the interlock selection switch 22 of each device is closed (on) and the interlock check push button switch 1 is pressed to perform a check, the AND circuit 23 and the OR circuit are activated by the switch 22, the contact re, and the push switch 1. The display output signal 25 is outputted through the signal line 24 and the display light L is outputted as described above.
lights up to notify you that interlocking is possible. After it is determined that interlocking is possible, the main circuit 14 sends the start signal 8 and the run/stop signal 13.
is supplied to the motor unit circuit 26, and on the condition that the previous stage equipment signal 15 exists (no failure signal has occurred), the AND circuit 16, the OR circuit 18, the interlocking operation output signal 19, and the contact 19-1 , and interlocking selection switch 2
2a, the coil of the primary switch 88 of the motor is excited and starts operation. By energizing the primary switch 88, the normally open contact 88-1 closes and sends an operation confirmation signal to the AND circuit 17.

Since there is no change in the other input signals of the AND circuit 17, the interlocking operation output signal 19 is held via the OR circuit 18, the primary switch 88 is self-maintained, and the indicator lamp L also continues to be lit. When the operation is stopped, the push button switch 8 opens the primary switch 88 via the NOR circuit 9, the operation/stop signal 13, the AS/OD circuit 16, and the OR circuit 18.
For example, when a failure such as overload occurs, the failure detection contact 2
7, the fault relay RE is energized and the normally closed contact re
is opened, the interlocking operation output signal 19 disappears via the AND circuit 17 and the OR circuit 18, the excitation of the primary switch 88 is released, and the operation of the motor is stopped. The indicator light L blinks after passing through the OR circuit 24 between the open signal at point 88-1 and the flicker signal 20. As described above, in the conventional overall control device, there are generally three or more input signals and two output signals in the motor unit circuit 26 of each device.

However, when applying a programmer full controller, which has been widely used in recent years, to such general control, it is extremely important to reduce the number of input/output signal points, since the number of input/output signal points is directly reflected in the price. Therefore,
SUMMARY OF THE INVENTION An object of the present invention is to provide an economical general control device that can reduce the number of input/output signals of motor unit circuits of each device and still perform the same functions.

In order to understand the invention more clearly, the invention will now be described in detail with reference to its embodiments.

FIG. 2 shows a circuit diagram of the general control device according to the present invention. In the figure, 8-1 is a contact that energizes the auxiliary relay R2 when the start signal 8 is output, and 31 is the negation of the start signal 8. 32 is an AND circuit between the signal, the movement check signal 4, and the fault signal from the normally closed contact re.
The output signal from the OR circuits 16, 17 and 21 is sent to the field circuit 3 as an interlocking operation output signal 33 via contacts 33-1.
Sent to 4.

As shown in the figure, 35 constitutes a motor unit circuit for each device. In the field circuit 34, from the switching point of the interlock selection switch 22 and the field independent operation selection switch 29 at the changeover switch 3, there is a primary switch normally open point 88.
-2 and the normally closed contact re of the fault relay RE and the primary switch 88
A series body of the coil and the failure detection contact 27 is connected in parallel with the indicator light L, and the primary switch contact 88-2 is connected to the central independent operation switching IJ relay RI and the start signal relay R.
The two contacts rl and r2 are respectively connected in parallel.

The rest of the configuration is the same as that of the general control device shown in FIG. Next, the operation of the general control device shown in FIG. 2 will be explained.

First, regarding the movement check, by pressing the pusher switch 1, the output signal of the AND circuit 31 becomes logically true (
(This is because the start signal is still logically false and no failure signal has been issued), the interlocking operation output signal 33 via the OR circuit 32 closes the contact 33-1 and the indicator lamp L lights up. When the start signal 8 is generated by the start push pin 6, the output of the AND circuit 31 becomes logically false, but since the input conditions of the AND circuit 16 are met this time, the output signal becomes logically true, and the indicator light L is lit in the same way. let At the same time, the contact r2 of the starting signal relay R2 is also closed, so the primary switch 88 is turned on and self-held by the contact 88-2. To stop the operation, use the pusher switch 8 to stop the operation.
The stop signal 13 becomes logically false and the AND circuits 31, 16, 1
7 and 21, all the output signals are logically false, so the motion operation output signal 33 is not energized, so the contact 33-1 is opened and the indicator lamp L stops lighting, and the primary switch 8
The energizing power for the coil No. 8 is also cut off, and the driving of the electric motor is stopped. In the event of a failure, failure relay RE operates to open its contacts re, turning off primary switch 88, and . Since the flicker signal 20 is sent as an interlocking output signal 33 to the field circuit 34 via the AND circuit 21, the indicator light L' blinks, indicating a failure. When performing solo operation, after opening the interlocking switch 2 and turning on the central solo operation changeover switch 28, the on-site solo operation selection switch 29 is operated to move the changeover switch 30 from selection position 22 to 29, and relay RI is activated. Since the contact rl is also energized, the contact rl closes and the indicator light L is turned on, and the primary switch 88 is also turned on to perform independent operation.

To summarize, among the conditions under which the interlocking operation output signal 32 mentioned above is output, only the indicator light L is turned on and the primary switch 8
When coil 8 is not excited, that is, when the motor is not operated, it is during interlock check and failure, and conversely,
The coil of the primary switch 88 is energized only during exercise operation.

As described above, it can be seen that one output signal from the motor unit circuit 34 in FIG. 2 is sufficient for each unit to perform the same function as the general control device in FIG. 1. This means that the total number of output points of the programmer full controller described above is half that of the slave controller.
In the above embodiment, the circuit is configured with three input signals, but the present invention is not limited to this.

According to this invention, the number of output signals of the programmer full controller used in the general control device is halved, so the entire device can be made inexpensive.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a conventional general control device, and FIG. 2 is a circuit diagram showing an embodiment of the general control device according to the present invention. 4...Movement check signal, 8...Start signal, 1
3... Run/stop signal, 14... Central main circuit, 28...・Central independent operation selector switch, R1, R2...relay,
rl, r2... Relay contact, 31, 16, 17, 21.
...AND circuit, 32...OR circuit, 15...
・Previous equipment signal, 20... Flicker signal, 33
...... Linked operation output signal, 33-1... Support point, 35... Motor unit circuit, 34... Field circuit 22... Linked operation selection switch, 29... Field independent operation Selection switch, L... Indicator light, 88...1
Secondary switch, 27...Failure detection contact, RE...Fault relay, 88-1, 88-2...Primary switch contact, Grip...Fault relay contact. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Figure 1 Port Figure 2

Claims (1)

[Claims] 1 Interlocking check signal, interlocking start signal, and interlocking operation/
A central main circuit that generates a stop signal and has a central independent operation changeover switch, a motor unit circuit that is connected to this main circuit and generates an interlocking operation output signal and is combined for each of a plurality of devices, and a When the electric motor is installed and receives the interlock output signal, it displays interlock check, interlock start, interlock operation, and standalone operation by the central standalone operation selection switch and the local standalone operation selection switch, and blinks in the event of a failure. When the indicator light and the above-mentioned interlocking start,
a field circuit including a primary switch that is energized during the interlocking operation and during the individual operation to control on/off of the motor; and a failure relay that is energized at the time of the failure to open the primary switch; In the integrated control device, the interlocking operation output signal is a first logical product signal of the interlocking check signal, a negative signal of the start signal, and a failure signal from a normally closed contact of the failure relay, and a first logical product signal of the start signal and the A second logical product signal of the failure signal, the run/stop signal, and the preceding equipment signal; a second logical product signal of the preceding equipment signal, the running/stopping signal, the failure signal, and an operation confirmation signal from the normally open contact of the primary switch; A third logical product signal, and a logical sum signal of a fourth logical product signal of the negative signal of the failure signal, the negative signal of the operation confirmation signal, and the flashing signal, and is interlocked with the contact controlled by the interlocking operation output signal. A series body with an operation selection switch,
The indicator light is connected in series to a parallel body of the contact point of the central islanding operation changeover relay energized by closing of the central islanding operation selector switch and the series body of the field islanding selection switch, and the indicator light Further, a series body of a failure detection contact, a coil of the primary switch, a normally closed contact of the failure relay, and a normally open contact of the primary switch are connected in parallel, and the normally open contact of the primary switch is connected in parallel. A contact of the central islanding switching relay and a contact of a start signal relay energized by the generation of the start signal are respectively connected to the open contact in parallel, and the failure detection contact detects the failure relay when the failure occurs. A general control device characterized in that it operates to energize.