JPS58141096A - Interruption system of load monitoring control system - Google Patents

Abstract

PURPOSE:To transmit an urgent signal speedily without any hindrance, by sending an emergency control signal while other transmitters stop sending signals temporarily due to an error of transmission caused by a signal for interruption such as the emergency signal. CONSTITUTION:In a figure, the 1st one-shot multivibrator 16 operates at a rise of the output of an input part 6, and the 2nd one-shot multivibrator 17 operates at a rise of the output of the 1st one-shot multivibrator 16 to send its output to a transmission data generation part 7; and an OR gate 18 inputs the output of the 1st one-shot multivibrator 16 and the output of the transmission part 8 and supplies its output to a modulation and demodulation part 13, and an AND gate 19 inputs the output of the modulation and demodulation part 13 to a reception data regeration part 12 only when the output of the 1st one-shot multivibrator 16 is at a level L. Thus, when there is an input from a switch 5, a busy signal is outputted firstly regardless of whether a circuit is used or not to stop the signal transmission of other transmitter and receivers temporarily, and an interruption to the circuit is caused.

Description

Detailed Description of the Invention The present invention connects a plurality of transmitters and receivers to a transmission line, calls an appropriate receiver from any transmitter, and controls the load belonging to the called receiver. In the load monitoring and control system that has been developed, the load l! This is related to the interrupt method for visual control systems.

1st mK An example of a conventional negative [1 visual control system] is shown. This conventional example shows a control system using a power line carrier method. t#), the AC line is a power supply line to the load (4) and is used as a control signal transmission line +11. The transmitter (2) is connected to the first receivers (3) to J
It is assumed that monitoring and control is performed between the lIn receiver +11 and the control signal shown in the $2 diagram. The contents of this control signal are as follows.

That is, the start signal informs the receiver (3) of the start of the control signal, the address data is alternate location data individually attached to each receiver (3), and the control destination is the transmitter (3).
t) indicates the control content to be transmitted to the receiver (3);
Parity-check is a rounding pit that determines whether the control signal was transmitted correctly. In addition, the response data is the data of the response content that the receiver ts+ transmits to the transmitter (2).
The end signal indicates the end of the control signal.

Of course, the following is an example of a control signal. One pit of this control signal corresponds to one cycle of the low and low pulses of the companion AC power supply shown in FIG. 8(b). Also, start signal, end signal, data “0” signal, data 21
As shown in Figures 8) and (b), the # signal is also calculated by dividing the 1 cylinder period of the 1! In the same figure, (d
``1#'' indicates when the carrier wave is on, and ``1#'' when the carrier wave is not on.
O#, the start signal is '0101', the end signal is '0110', and the eta 0 signal is '0100'.
, the data l signal is ``0111''.Thus, by allocating the signals as described above, the data 10#
It is possible to distinguish between times when a signal is being transmitted and times when no signal is being transmitted. Consider a case where a control signal is transmitted from a transmitter (2) to its corresponding receiver (3) during a busy period when a valve control signal is being transmitted, that is, the line is in use. In the system shown in Fig. 1, after the line changes from busy to non-busy, as shown in Fig. 4, for example, 16 cycles (1 cycle is t! ), and if the transmitter (2) starts transmitting the signal, then in this system, no matter how urgent the signal is to be transmitted,
There is a problem in that when the line is busy, it is impossible to escape the control signal at all, and even when the line is not busy, the line has to wait for 160 seconds. In FIG. 4, (b) shows the control signal of the other transmitter (2) which is currently transmitting, and (b) shows the control signal of the transmitter !121 which is about to start transmitting.

Next, a block diagram of the transmitter (2) of the system shown in FIG. 511 is shown in FIG. In this circuit shown in Fig. 5, the input switch 11) is the external operation switch and address authorization switch of the transmitter, and the input section (-) latches the signal from the input switch (@). Next, transmit data is created. Part (1) is the signal from the entrance switch 9, which creates the control signal shown in Figure 2.
(8) sends out a signal created by the transmitter generator (singing).
6. Outputs a 0x standby signal to the transmitter +Ill. On the other hand, the pidgey detection unit (to) monitors the θth output of the received data reproducing unit and outputs a busy (line in use) signal, and the transmission error Shuntabe (11) detects the transmitted data and the received data. The comparison is made, and if the result is incorrect, a retransmission request signal is output.

In addition, the reception output reproducing section (l!l determines the presence or absence of a carrier frequency and regenerates the received data, and the modulation/demodulation section 0:4 modulates and demodulates the control signal.In addition, the Kt!Os jetting section C141 detects the zero cross of AC voltage 1 [M wave,
The I3 signal generation unit (I@ is the ZERO and 02 detection unit 0) generates 9 TIE signals in synchronization with the zero signal emitted by the 02 detection unit 0. The above is an explanation of the operation of each part. Regarding the receiver +11K, although it is not shown in the 4IK diagram, it has almost the same circuit configuration as the transmitter (1), and a true output circuit that controls the load (4) is added to the received data reproducing section Q@. death,
This allows the receiver+i+ to be operated locally.
Eating.

Transmitter (2) with lacquer circuit configuration as shown in No. 516
When the transmitter (receiver) attempts to send out a control signal using a power signal by operating the external input switch (6), first determine whether or not it is busy. death,
If it is busy, it becomes non-busy and waits for further l-return 41- to start transmitting.If the above-mentioned 6th trench 9 is determined, it starts disseminating the control signal. However, when , it is determined whether there is a transmission error or not, and if a transmission error is detected, the transmission 7m operation is immediately stopped and transmission is resumed after (16 + own address code) or c1 tak. It turns out. Here? - The detection section signal divides the period between zero and zero cross pulses into four, and no matter how much carrier frequency there is, it will be determined as billy and output a busy signal), and when transmission I5- is detected. , (16 + own address number) The reason why transmission is restarted after zero is set is that by prioritizing the addresses, several transmitters (2) can start retransmission at the same time. This is to prevent errors in signal transmission from occurring by shifting the starting ties from each other when attempting to do so. Therefore, in this conventional example, control signals can only be transmitted after the line is non-busy and at least 160 seconds have passed, and for this reason, emergency signals such as emergency signals are required. There was a problem that caused problems in signal transmission.

The present invention has been provided in view of the above points, and enables interruption of emergency signals etc. to lines in use.
It is an object of the present invention to provide an interrupt method for a visual load control system that allows urgent signals to be transmitted quickly and without any problems.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 6 shows an example circuit of the present invention, in which $
The embodiment circuit shown in FIG. 6 is obtained by adding the following circuit parts to the conventional example circuit shown in FIG. 4, and the same circuit parts as those in the conventional example circuit shown in FIG. That is, in this embodiment circuit of FIG.
This first one-shot multi (n) operates with the output of the second one-shot multi (n) and inputs its output to the transmission data creation section (7), and the output of the first one-shot multi and an OR gate H which inputs the output of the transmitter +81 and inputs the output to the modulator/demodulator α4, and a data reproducing unit which receives the output of the modulator/demodulator a field only when the output of the first one-shot multi (lη) is at L level. An AND gate (I) for inputting to Q# is added to the conventional circuit shown in Figure JII4.

Therefore, in this JIS diagram example circuit, when there is an input from the input switch +1), a busy signal is first output regardless of whether the line is used or not, and signal transmission between other transmitters and receivers is performed. K to pause the line and interrupt the line.
There are nine things. That is, in this embodiment circuit of FIG. 6, when the input switch (6) is operated, the signal is latched in the input section (6) as shown in FIG. At the rising edge of the output of section +61, the first glue: /!/ Yotsuto multi-detector is inputted as shown in (b) in the same figure, and then, at the falling edge of the output of Ill, the first Nori: /!/ The second output signal (I) is triggered as shown in FIG. The output of VGL's one-shot multi-H is often superimposed with a 1H# level busy signal.This busy signal causes other transceivers (3) to transmit signals as shown in (f) in the same figure. However, the transmitter that generated this busy signal (in its own circuit, the acid gate (+@ is the The received data reproducing unit (l does not convey the information to the rumors.

Therefore, the other transceiver 113 (81 has lost the busy signal, Jll f Is! 1) f) Yo 5 K"
(1q + address of own 11r) is transmitted after o-), whereas this circuit transmits the signal after the OR gate 01) output reaches the ant H# level, as shown in the same figure @, the signal is transmitted (16 + own address) Signal transmission can begin after the reset is zero.

In other words, even if the circuit is in use, if there is an input from the input switch (II), this circuit will forcibly transmit data.
) by transmitting a busy signal to other transceivers (!l) to cause a transmission error in 81, thereby stopping signal transmission, and allowing the control signal of the Liu-in circuit to be interrupted into the line. FIG. 7 (φ is the output of the transmission data creation section (F)).

Since the present invention is configured as described above, if control signals are being transmitted and received between other transmitters and receivers,
This makes it possible to interrupt signals, and has the effect that urgent signals such as emergency signals can be transmitted quickly and reliably.

[Brief explanation of the drawing]

Is Figure 1 negative? 1! 5 is a schematic diagram of a visual control system; an explanatory diagram of the operation from the time when the second device finishes selecting a control signal until the second transmitter starts sending out a control signal; FIG. 5 is a block diagram of a conventional transmitter; FIG. 6 is a block diagram of a transmitter according to an embodiment of the present invention, and FIG. (3) is the receiver, and (4) is the load. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) A plurality of transmitters and receivers are connected to the transmission 5 input, and the transmitter sends out a transmission signal including address data, and the receiver selected by this address data controls its subordinate operation. In a load monitoring control system that includes a transmitter that is configured to detect a transmission error and start retransmission after a certain period of time, it can be used as an emergency signal. In response to the input of a signal for an interrupt, a means is provided to inject a signal onto the transmission line to cause a transmission error to other transmitters using this transmission line. 1. An interrupt system for a load blind control system, characterized in that an emergency control signal is sent when signal transmission is temporarily stopped due to a transmission error.