JPS6341480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time division multiplex transmission system in which a main controller controls and monitors a plurality of terminals.

In the typical prior art of the present invention, a plurality of terminals are sequentially and cyclically addressed for control and monitoring. When there are a large number of terminal devices, it takes time for the load associated with the terminal device, such as a lighting device, to turn on after an input operation is made, such as by pressing a button, resulting in a problem of slow response speed. be. In addition, if the lighting device is configured to repeatedly turn on and blink each time a push button is pressed, the response speed will be slow.
For example, after an operator operates a push button to turn on a light, the light does not turn on immediately, so there is a tendency for the operator to operate the push button again after a while. At this time, the lighting device remains off. Therefore, the prior art was prone to erroneous operation. Also,
Such prior art has a problem in that if the main control device fails, it becomes impossible to control all the loads.

An object of the present invention is to provide a time division multiplex transmission system that can shorten the response speed, prevent erroneous operations, and control the load even when the main controller fails.

The present invention provides a plurality of terminal devices controlled and monitored by a main control device, sets an address for specifying each terminal device, and the main control device sends an address signal, a control signal, and a reply request signal. The addressed terminal controls the load associated with the terminal in response to the control signal and informs the main controller of the control state of the load in response to the reply request signal. In the time-division multiplex transmission system for transmitting a monitoring signal representing a signal, the terminal device has a single-turn linear latching relay 85, and this latching relay 85 has a first
a second relay switch 87 having a common contact connected to one end of the AC power supplies 72 and 73 and having two individual contacts 88 and 89 with which the common contact 87 selectively conducts; When current flows, the first relay switch 86 conducts, the common contact of the second relay switch conducts to one individual contact 89, and when the current flows in the opposite direction, the first relay switch 86 shuts off,
A relay coil 90 is provided in which a common contact of the second relay switch is electrically connected to the other individual contact 88, and one terminal of the relay coil 90 is connected to the other through a first diode 93 directionally coupled in the opposite direction. a second diode 92 connected to the individual contacts and directionally coupled in the one direction 91;
The other terminal of the relay coil 90 is connected to the other end of the AC power supplies 72 and 73 via an operation switch circuit 94, and the operation switch circuit 94 is connected to the changeover switch S1.
Third and fourth diodes 100, 99 are respectively connected with mutually opposite polarities to two individual contacts 96, 97 which are selectively conductive to a common contact 98, and the third and fourth diodes 100, 9
The terminals on the opposite side from the individual contacts 96 and 97 of 9 are connected in common, and the common contact 98 of the changeover switch S1 and the third and fourth diodes 10
A display light emitting diode 101 is connected between the common connection point of 0 and 99, and a pair of photothyristors 104 and 105 are connected in parallel to the operation switch circuit 94 with mutually opposite polarities. A return light emitting diode 103 is also connected in parallel to the operation switch circuit 94, and when addressed by the address signal, the photothyristor 10 is activated in response to the control signal.
A light emitting element 69 that selectively provides light to 4,105,
Means 44, 45, 49, 61, 6 comprising 71
5, 66, and means 106, 111, 48 for receiving light from the return light emitting diode 103 and deriving the state of the light reception as a monitoring signal.

FIG. 1 is a block diagram of one embodiment of the present invention. The plurality of terminal devices 1 to m are connected to a main controller 21 by a common line 20. Each terminal 1
～m has loads L1～L4; L5～L8;...;Ln
-3~Ln is connected. These loads L1
~Ln is the switch means 11 for each terminal device 1~m,
12, . It can be controlled by a time-division multiplex transmission method using an associated sub-operation panel 24. Switch S1~
Sn is collectively referred to as switch means 11-1m, and corresponds to the loads L1-Ln individually, and is a switch for controlling the loads L1-Ln, respectively. The main operation panel 22 is provided with switches S1 to Sn corresponding to all the loads L1 to Ln, and the sub operation panel 24 is provided with switches S1 to Sn corresponding to all the loads L1 to Ln.
A switch corresponding to a predetermined load among ~Ln, for example, S1, S2, S7, S8, Sp, Sq,
Sr and Sn are provided.

The main control device 21 sends a transmission signal shown at 1 in FIG. 2 to the terminals 1 to m and the terminal 23 via the line 20. This transmission signal is sent out sequentially and cyclically. The addressed terminals 1-m send out monitoring signals indicating the control status of the loads L1-Ln, as shown in FIG. 2, during the sending period of the reply request signal. The terminal device 23 is the sub-operation panel 2
A signal representing the state of the switch operated by the operation No. 4 is sent out as a monitoring signal.

FIG. 3 is a block diagram of the main controller 21.
The central processing unit 32 is given an input signal from the main operation panel 22 . The signal from the central processing unit 32 is transmitted from the transmission signal generation circuit 33 to the transmission output circuit 34.
The transmission signal of FIG. 2 is sent out on line 20 via. Line 2 from terminals 1 to m and 23
The supervisory signal sent out through 0 is detected by the supervisory signal detection circuit 35 , received and processed by the reception processing circuit 36 , and then input to the central processing unit 32 . A memory 37 is connected to the central processing unit 32, and the contents of this memory 37 can be displayed by a display device 38.

FIG. 4 is a block diagram of the terminal device 1. The transmission signal from the main controller 21 via the line 20 is
The signal is inputted from the coupling circuit 40 to a start signal detection circuit 41, an address signal control signal detection circuit 42, and a reply request signal detection circuit 43, and the start signal, address signal, control signal, and reply request signal are detected, respectively. When a start signal is detected by start signal detection circuit 41, address register 44 and control signal register 45 are cleared. Next, when the address signal and control signal are received, they are detected by the address signal control signal detection circuit 42. Therefore, an address signal is stored in the address register 44. Control signals are stored in the control signal register 45.
Address data specifying the terminal device 1 is set in the address setting circuit 46 in advance. When the reply request signal detection circuit 43 detects the reply request signal, the comparison circuit 47 is activated and the address data stored in the address register 44 and the address data from the address setting circuit 46 are compared. When these two address data match, the comparison circuit 47 outputs a high-level match detection signal to the AND gate 48, and the pulse width of this high-level signal has a value equal to or longer than the period during which the monitoring signal is generated. The coincidence detection signal from comparison circuit 47 is also applied to output register 49, and output register 49 is enabled. The output register 49 is
Based on the contents of the control signal stored in the control signal register 45, the load L1 is applied to the output terminals P1 to P4.
-Give signals individually corresponding to L4. The loads L1 to L4 are thereby controlled. Load L1~
L4 is, for example, a lighting device. Output register 4
The output terminals P1-P5 of 9 correspond individually to the respective bits b1-b5 (see FIG. 2) of the control signal, and the bits b1-b4 individually correspond to the loads L1-L4. When the last bit b5 of the control signal is logic "1", the output terminal P5 of the output register 49 is logic "1", and in this case, time sharing is performed based on the operation of the main operation panel 22 or the sub operation panel 24. This is when the loads L1 to Ln are controlled by the multiplex transmission method. When the switches S1 to Sn provided individually associated with the terminals 1 to m are operated to control the loads L1 to Ln, the last bit b5 of the control signal is logic "0"; Therefore, the output terminal P5 of the output register 49 is at a low level. From the output terminal Q of the output register 49, when the coincidence detection signal is input from the comparison circuit 47, a signal having a pulse width that is at a high level is derived from the output terminals P1 to P5 at least until the signals are completely derived.

The output circuit 6 corresponds to the loads L1 to L4 individually.
1, 62, 63, and 64 are provided, respectively. These output circuits 61-64 are enabled by transistor 66 responsive to the output from AND gate 65. Signals from output terminals P5 and Q of the output register 49 are applied to the AND gate 65. In this way, the terminal device 1 is addressed, and the loads L1 to L4 are controlled by the time division multiplex transmission method by operating the main operation panel 22 or the sub-operation panel 24, so that the last bit b5 of the control signal is set to logic. When the signal is "1", the output from the AND gate 65 is at a high level, and accordingly the transistor 66 becomes conductive and the output circuits 61 to 64 are activated. Output circuits 61-64 have similar structures.

In the output circuit 61 corresponding to the load L1, the signal from the output terminal P1 of the output register 49 is input to the transistor 68 via the diode 67. In order to drive the load L1, when the bit b1 of the control signal corresponding to the load L1 is logic "1", the output terminal P1 becomes high level, and the transistor 68 becomes conductive. Therefore, the light emitting diode 69 is activated and generates light. The collector of transistor 68 is connected to the base of another transistor 70. When the output terminal P1 is at a high level and therefore the transistor 68 is conducting, the transistor 70 is cut off and the light emitting diode 71 connected in series with the transistor 70 remains inactivated. be. If load L1 is not driven,
Since the output terminal P1 is at a low level, the transistor 68 is cut off, and at this time, the transistor 7
0 is conductive. In this way, light is emitted from the light emitting diode 71 when the load L1 is not driven. The remaining output circuits 62-64 are responsive to signals from output terminals P2-P4 of output register 49, respectively.

The terminal device 1 is provided with an AC power source 72,
The power from this AC power supply 72 causes the load L1 to
L4 is powered up. These loads L1 to L4
are operated by load control circuits 81-84 associated with output circuits 61-64. Load control circuit 8
1, 82 to 84 have similar configurations, and AC power supply 7
2 through a transformer 73.

In the load control circuit 81, a single-turn latching relay 85 having a self-holding function has a switch 86, which is connected in series to the load L1. Another switch 87 of the latching relay 85 has individual contacts 88,89. When an excitation current flows in the direction of arrow 91 through the relay coil 90 of the latching relay 85, the switch 86 becomes conductive, the switch 87 conducts to the individual contact 89, and this switching state is self-maintained.
When the excitation current flows through the relay coil 90 in the opposite direction of the arrow 91, the switch 86 is cut off, and the switch 87 is switched to the individual contact 89 to conduct, and this switching state is self-maintained. Individual contact 88
The diode 9 has a forward direction in the direction of the arrow 91.
2 is connected. The other individual contact 89 is connected to a forward diode 93 in the opposite direction of the arrow 91 .

The operation switch circuit 94 has a switch S1,
This switch S1 has individual contacts 96,97. When the common contact 98 of the switch S1 is not operated, the common contact 98 is replaced by the individual contacts 96, 97.
It is in a neutral state as shown in the figure, for example, by a spring force. To energize and drive the load L1, the common contact 98 is brought into conduction with the individual contacts 96.

When the load L1 is deenergized and not driven, the common contact 98 is made conductive to the individual contact 97 side. A diode 99 forward in the direction of arrow 91 and a diode 100 forward in the opposite direction of arrow 91 are connected to the individual contacts 96 and 97, respectively. Load L
The operation switch circuit 94 includes a light emitting diode 101 for display that lights up when the light emitting diode 1 is energized. A capacitor 102 is connected in parallel to the operation switch circuit 94. Further, the light emitting diode 103 is connected in series with the resistor 110,
The series circuit is connected in parallel to the operating switch circuit 94. The light emitting diode 103 is directionally coupled in a forward direction opposite the arrow 91 and therefore lights up when the load L1 is energized. Further, photothyristors 104 and 105 are connected in parallel to the operation switch circuit 94.
The photothyristor 104 receives light from the light emitting diode 69, and the photothyristor 104 receives light from the light emitting diode 69.
05 receives light from the light emitting diode 71.
The light from the light emitting diode 103 is transmitted to the light receiving element 10
6 constitutes a photocoupler.
The light receiving element 106 changes its resistance value to a small value when it receives light. The remaining load control circuits 82 to 84 also have the same configuration as the load control circuit 81, and individually correspond to the light receiving elements 107 to 109.

Assume that the load L1 is controlled by the time division multiplex transmission method by operating the main operation panel 22 or the sub-operation panel 24. In this case, when the load L1 is energized, the bit b1 of the control signal corresponding to the load L1 is logic "1", and therefore the transistor 68 of the output circuit 61 is turned on as described above. However, at this time, the last bit b5 of the control signal is logic "1" and the transistor 66 is conductive.
Therefore, the light from the light emitting diode 69 is received by the photothyristor 104. In this way, a half-wave current flows through the relay coil 90 in the direction of the arrow 91. Therefore, the switch 86 becomes conductive, the switch 87 switches to the individual contact 89, and this state is self-maintained. Load L1 thus remains powered. During the next half-wave cycle in the opposite direction, a charging current flows through the capacitor 102, but this can be done by selecting a high impedance for the capacitor 102 and increasing the resistance value of the resistor 110 connected in series with the light emitting diode 103. , the switching mode of the latching relay 85 is never changed. The light from the light emitting diode 103 is received by the light receiving element 106. The supervisory signal generation circuit 111 detects that the resistance of the light receiving element 106 has become small, and provides a signal to the AND gate 48. In this way, a logic "1" signal representing driving of the load L1 is derived from the first bit a1 of the monitoring signal corresponding to the load L1, and is sent from the coupling circuit 40 to the main controller 21 via the line 20. . The power energization state of load L1 is indicated by light emitting diode 101.

A case will be assumed in which the load L1 is deenergized using the time division multiplex transmission method by operating the main operation panel 22 or the sub-operation panel 24. In this case, the control signal load L1
The bit b1 corresponding to the bit b1 is logic "0" and the transistor 68 is cut off, so that the transistor 66 is conductive, and the transistor 70 is also conductive, thereby causing the light emitting diode 71 to light up. Therefore, the photothyristor 105 becomes conductive. In this way, a current flows through the relay coil 90 in the direction opposite to the arrow 91, the switch 86 is cut off, and the switch 87 is made conductive to the individual contact 88.
The display light emitting diode 101 and the light emitting diode 103 do not light up, and the monitoring signal generation circuit 111
derives an output with bit a1 corresponding to load L1 of the monitoring signal set to logic "0".

Assume that when the switches 86 and 87 are in the illustrated state, the load L1 is energized by the operation of the switch S1. In this case, the common contact 98 is electrically connected to the individual contacts 96. As a result, a current flows through the relay coil 90 in the direction of the arrow 91. Therefore, the switch 86 becomes conductive, and the switch 87 becomes conductive to the individual contact 89. Load L1 is thus energized. The current flowing in the opposite direction to the arrow 91 charges the capacitor 102 and lights up the light emitting diode 103, but by making the impedance of the capacitor 102 and the resistance value of the resistor 110 sufficiently large as described above, the relay can be activated. The value of the current flowing in the direction opposite to the arrow 91 in the coil 90 is reduced to prevent the switching state of the latching relay 85 from being changed.

At this time, the light receiving element 106 also receives the light from the light emitting diode 103, and the supervisory signal generating circuit 111 generates bit a corresponding to the load L1 of the supervisory signal.
Derive the output with 1 as logic "1". Also, when the load L1 is energized, the light emitting diode 1
01 lights up and the display is performed.

To de-energize load L1, common contact 98 of switch S1 conducts to individual contact 97, thereby causing current to flow through relay coil 90 in the opposite direction of arrow 91. In this way, switch 86 is disconnected and relay switch 87 conducts to individual contact 88.

A plurality of operation switch circuits 94 may be provided in parallel.

A signal input by operating the sub-operation panel 24 is sent from the terminal device 23 as a monitoring signal to the main controller 21 via the line 20.
The loads L1 to Ln of the terminals 1 to m are controlled via the line 20 as a control signal from the terminal device 1. The sub-operation panel 24 has a plurality of setting addresses, and each setting address corresponds to switch groups S1 to S8, Sp.
~Sn may be made to correspond.

As described above, according to the present invention, the switch means is provided in association with the load provided in connection with the terminal, and the load can be controlled by operating the switch means. Therefore, response speed can be improved and malfunctions can be prevented. Furthermore, even if the main control device fails, the load can be controlled by operating the switch means. In particular, according to the invention:
The load can be controlled by directly specifying on or off, and the actual control status is displayed, making it easy to check the control status.

[Brief explanation of the drawing]

FIG. 1 is an overall system diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a time division multiplex transmission system, FIG. 3 is a block diagram of the main controller 21, and FIG. 4 is a diagram of the terminal device 1. It is a block diagram. 1~n, 23...Terminal, 11, 12, 1m...
...Switch means, 20...Line, 21...Main controller, 22...Main operation panel, 24...Sub-operation panel,
41...Start signal detection circuit, 42...Address signal control signal detection circuit, 43...Reply request signal detection circuit, 47...Comparison circuit, 49...Output register, 61-64...Output circuit, 69, 71 ,1
01,103...Light emitting diode, 81-84...
...Load control circuit, 85...Latching relay, 1
04,105...Photothyristor, L1~Ln
...Load, S1~Sn...Switch.

Claims (1)

[Claims] 1. A plurality of terminal devices are provided which are controlled and monitored by a main control device, and an address is set for specifying each terminal device, and the main control device sends address signals, control signals, and replies. A transmission signal containing a request signal is sent to a terminal device, and the addressed terminal device responds to the control signal to control the load associated with the terminal device, and responds to the reply request signal to cause the master controller to control the load. In the time-division multiplex transmission system that sends out a monitoring signal representing the control state, the terminal device has a single-turn linear latching relay 85, and this latching relay 85 is connected in series to the load L1 and the power source 72. 1st
a second relay switch 87 having a common contact connected to one end of the AC power supplies 72 and 73 and having two individual contacts 88 and 89 with which the common contact 87 selectively conducts; When current flows, the first relay switch 86 conducts, the common contact of the second relay switch conducts to one individual contact 89, and when the current flows in the opposite direction, the first relay switch 86 shuts off,
A relay coil 90 is provided in which a common contact of the second relay switch is electrically connected to the other individual contact 88, and one terminal of the relay coil 90 is connected to the other through a first diode 93 directionally coupled in the opposite direction. a second diode 92 connected to the individual contacts and directionally coupled in the one direction 91;
The other terminal of the relay coil 90 is connected to the other end of the AC power supplies 72 and 73 via an operation switch circuit 94, and the operation switch circuit 94 is connected to the changeover switch S1.
Third and fourth diodes 100, 99 are respectively connected with mutually opposite polarities to two individual contacts 96, 97 which are selectively conductive to a common contact 98, and the third and fourth diodes 100, 9
The terminals on the opposite side from the individual contacts 96 and 97 of 9 are connected in common, and the common contact 98 of the changeover switch S1 and the third and fourth diodes 10
A display light emitting diode 101 is connected between the common connection point of 0 and 99, and a pair of photothyristors 104 and 105 are connected in parallel to the operation switch circuit 94 with mutually opposite polarities. A return light emitting diode 103 is also connected in parallel to the operation switch circuit 94, and when addressed by the address signal, the photothyristor 10 is activated in response to the control signal.
A light emitting element 69 that selectively provides light to 4,105,
Means 44, 45, 49, 61, 6 comprising 71
5, 66; and means 106, 111, 48 for receiving light from the return light emitting diode 103 and deriving the state of the light reception as a monitoring signal.