JPH07105121A - Decentralized controller - Google Patents

Abstract

PURPOSE:To prevent a wrong output signal due to address missetting from being inputted to a control board by automatically setting the addresses of plural equipments in a short time by the decentralized controller which has a control board and plural equipments. CONSTITUTION:The control board 10 are plural equipments 100, 200 ... are connected in a loop. The control board 10 has a control part 11 which sends an address setting instruction and a reference address and a storage part 12 which stores an address sent from a final equipment when the address setting command and address are sent from the final equipment. Each equipment has a control part 110 which adds or subtracts a specific value to or from the sent address in response to the input of the address setting command and sends the result as the address of a following equipment and a storage part 120 which stores the sent address or the address of the following equipment to be sent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an address transmitted from a control panel and a plurality of devices (for example, detector, control panel, etc.).
The present invention relates to a distributed control device that determines whether or not a match occurs with a unique address of a device and outputs an output signal from a device that matches the address.

[0002]

2. Description of the Related Art In a distributed control system in which a single control panel controls a plurality of devices, it is necessary to set a unique address (address) of each device as viewed from the control panel. As a conventional distributed control device that can meet this type of requirement, the one shown in FIG. 5 has been known. In the distributed control device shown in the figure, a plurality of devices B1, B2 ... Are connected to a control panel A, and each device B1, B2 ...
Of the address setting switches S1 and S2, respectively.
..., the address transmitted from the control panel A and the unique address set by the switch units S1, S2, ... match,
Match detection unit C1, which determines a mismatch and sends a match signal
C2 ..., Detectors D1, D2 ... For detecting a predetermined phenomenon. Further, the control panel A is also provided with a switch section S for inputting and storing the number of each device B1, B2 ....

In such a conventional distributed control device, an address unique to each of the devices B1, B2 ... Is set by the switch sections S1, S2.
Based on the output read command from the control panel A, the coincidence detection unit C
.., C2 ... Determine whether or not the address transmitted from the control panel A matches the unique address, and only when they match, the output signal is transmitted to the control panel A. In this case, the number of all addresses transmitted from the control panel A matches the number of each device B1, B2, ....

[0004]

However, in the conventional distributed control device, it is necessary to artificially perform the unique address of each device B1, B2 ... With the switch units S1, S2. There is a possibility that an address setting may be erroneous due to an operation error in S1, S2 ..., And an erroneous output signal may be output to the control panel A to cause a trouble. Further, since it is necessary to operate the switch sections S1, S2 ... For each of the devices B1, B2 ..., There is a problem that it takes time to set the address.
Further, the number of each device B1, B2, ... To be stored in the control panel A may be erroneously set due to an operation error of the switch unit S.

The present invention has been made in view of the above problems, and the unique address of each device is set on the basis of an address setting command transmitted from one control panel. Addresses of multiple devices can be set automatically in a short time, and moreover, by preventing an error in the address set by each device, an incorrect output signal due to an address setting error will be sent to the control panel. It is an object to eliminate a room for a problem such as input and a trouble, and also a room for an error in setting the number of each device on a control panel.

[0006]

In the distributed controller according to the present invention, a control panel and a plurality of devices are connected in a loop, and the control panel outputs an address setting command and a reference address. Each device has a control unit that sends, and each device adds or subtracts a predetermined numerical value from the address sent by the input of the address setting command and sends it as the address of the next device. Alternatively, it has a storage unit for storing the address of the next device to be transmitted.

In the distributed control device according to a second aspect of the present invention, in the configuration according to the first aspect, when the control panel stores the address setting command and the address transmitted from the final device, the address at that time is stored. It has a storage unit that operates.

[0008]

In the distributed control apparatus according to the first aspect of the present invention, when the address setting command and the reference address are transmitted from the control panel, the control unit in the first device adds or subtracts a predetermined numerical value to the reference address. Then, the address is transmitted as the address of the next device, and the reference address or the address to be transmitted to the next device is stored in the storage unit as its own address. Then, in the second device, the control unit adds or subtracts a predetermined numerical value from the address transmitted from the first device and transmits it as the address of the next device, and the address transmitted from the first device. Alternatively, the address to be transmitted to the next device is stored in the storage unit as its own address. Then, similarly to the third device and thereafter, the address is stored in the storage unit in each device.

In the distributed control device according to the second aspect of the present invention, the following action is obtained in addition to the action obtained by the first aspect of the invention. That is, by transmitting the address setting command and the address from the final device to the control panel, the control unit of the control panel can stop the address setting command and the address transmission and complete the address setting of each device. At the same time, the number of each device can be accurately recognized based on the address transmitted from the final device.

[0010]

1 is a block diagram for explaining a distributed control apparatus according to an embodiment of the present invention. In the figure, 1
Reference numeral 0 denotes a control panel, which includes a control unit 11 that transmits an address setting command and a reference address, a storage unit 12 that stores the address when the address setting command and the address are transmitted from the final device, which will be described later, It has an input unit 13, an output unit 14, a power supply unit 15, and the like. Reference numeral 100 denotes a first device, which receives an address setting command and adds or subtracts a predetermined numerical value to and from a transmitted address to transmit it as the address of the next device. In addition to the storage unit 120 that stores the address of the next device, the input unit 130, the output unit 140,
Power supply unit 150, detection unit 16 for detecting a predetermined phenomenon
Has 0 and so on. Reference numeral 200 denotes a second device, which receives an address setting command and adds or subtracts a predetermined numerical value from the address to be transmitted, and transmits the address as the address of the next device. Storage unit 220 that stores the address of the next device
In addition to the input unit 230, the output unit 240, the power supply unit 250,
It has a detecting unit 260 for detecting a predetermined phenomenon. For the third device and the final device thereafter (nth device), the first and second devices 100, 2
Since it is the same as 00, it is omitted in the drawing.

The control panel 10 and each device from the first device 100 to the nth device are connected in a loop by a communication line. In FIG. 1, the output unit 1 of the control panel 10
The communication from the fourth to the input unit 130 of the first device 100, the communication from the output unit to the input unit between the devices, and the communication from the final device to the input unit 13 of the control panel 10 may be serial communication or parallel communication. Well, the input section 1 of the control panel 10
3, the output unit 14, the input unit and the output unit of each device can be replaced with a communication unit. FIG. 2 is a flow chart when the address of each device is set using the distributed control device of FIG. Here, the address setting command is “01” and the reference address is “001”.

In FIG. 1 and FIG. 2, at the beginning of system startup, an address setting command "01" and an address "00" are sent from the nth device (final device) to the storage unit 12 of the control panel 10.
Since n + 001 ”has not been transmitted, the storage unit 12
The address is not stored in. Therefore, the address setting command "01" and the reference address "001" are output from the control unit 11 of the control panel 10 in the distributed control device, and those signals are input to the first device (No. 1 detector). No. In the No. 1 detector, the reference address “001” is set to No. No. 1 is stored in the storage unit 120 as the address of the detector itself, and the control unit 110 stores the reference address “00
1 ”is added with a predetermined numerical value, for example,“ 001 ”, and the added numerical value“ 002 ”is transmitted as the address of the second device (No. 2 detector). The address “002” transmitted from the No. 1 detector is stored in the storage unit 220 as the address of the No. 2 detector itself, and the control unit 210 adds a predetermined numerical value, for example, “001” to the address “002”. Then, the added value “003” is transmitted as the address of the third device (No. 3 detector) .The same operation is performed after the device of the No. 3 detector, and the n-th device (final device). ), The address setting command “01” and the address “00n + 001” are transmitted to the control panel 10,
The control unit 11 of the control panel 10 stops the transmission of the address setting command “01” and the address “001”, and the address setting of each device is completed.

The distributed control device described above can be used, for example, as a vehicle presence detection device in a parking lot. Figure 3
Is an explanatory view of such an in-vehicle detection device. In the figure, No. 1 connected to the control panel 10 in a loop. It is possible to use, for example, an optical sensor for determining the presence / absence of a vehicle body of the automobile in the detection units 160, 260 ... From the first detector to the final device (No. n detector).

FIG. 4 is a flow chart for reading the detection signals of the detection units 160, 260 ... In the devices 100, 200. As shown in the figure, when a read address, for example, "001" is transmitted from the control panel 10, the first device (No. 1 detector) has its own address "001" and the read address "001" transmitted. Is compared with. In this case, No. In the No. 1 detector, the address "001" of its own coincides with the read address "002" transmitted. A detection signal from the detector 160 of one detector is output. In addition, No. Since the address "001" transmitted from the first detector does not match the addresses of the second and subsequent devices (detectors), No. 1 The address “001” sent from the detector is the control panel 10 as it is.
Input to 0. Then, when the detection signal or the read address is input to the control panel 10, the detection signal is stored in the storage unit 12 of the control panel 10 and the output of the read address “001” is stopped.

Next, a numerical value "0" is assigned to the read address "001".
Read address "00" corresponding to the value obtained by adding "01"
2 "is transmitted from the control panel 10, and the No. 1 detector compares its own address" 001 "with the transmitted read address" 002 ". In this case, the No. 1 detector itself No. 1 because the read address “002” of the transmitted address “001” does not match
The read address “002” transmitted from the detector is the same as the No. 2 is input to the detector and No. The two detectors compare their own address "002" with the read address "002" transmitted. In this case, No. In the No. 2 detector, the address "002" of its own coincides with the read address "002" transmitted. The detection signal from the detector 260 of the two-detector is output. Also,
No. 2 The address “002” sent from the detector is N
o. Since it does not match the addresses of the devices 300 ... 2 The address "0" sent from the detector
02 "is directly input to the control panel 100. And
When a detection signal or a read address is input to the control panel 10,
The detection signal is stored in the storage unit 12 of the control panel 10, and the output of the read address "001" is stopped.

Next, a read address "0" corresponding to the value obtained by adding the numerical value "001" to the read address "002".
03 ”is transmitted from the control panel 10, and the same procedure as described above is repeated. When the maximum read address“ 00n ”is input to the control panel 10, the control panel 10 transmits the read address. Be stopped.

In the embodiment described with reference to FIGS. 1 and 2, the control unit of each device has been described in which a predetermined numerical value is added to the transmitted address and the result is transmitted as the address of the next device. This point is in the control section of each device,
A predetermined numerical value may be subtracted from the transmitted address and the address may be transmitted as the address of the next device. Also,
I explained that the storage unit of each device stores the transmitted address, but this point is that the storage unit of each device is
The address of the next device to be transmitted may be stored.

[0018]

According to the distributed control apparatus of the present invention, a control unit for adding or subtracting a predetermined numerical value to the address transmitted to each device based on the address setting command and transmitting it as the address of the next device. And a storage unit that stores the address transmitted or the address to be transmitted to the next device as its own address, and these devices are connected to the control panel in a loop, so the control panel By sending the address setting command and the reference address from the device, the addresses up to the n-th device can be automatically set. Therefore, it is possible to prevent a trouble from occurring due to an address setting error of each device, and it is possible to automate the address setting and shorten the address setting time. Furthermore, since the number of each device can be calculated based on the address transmitted from the final device to the control panel, it is possible to automate the setting of the number of each device on the control panel and prevent a setting error.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a distributed control device according to an embodiment of the present invention.

FIG. 2 is a flow diagram when setting an address of each device using the distributed control device of FIG.

FIG. 3 is an explanatory diagram of a vehicle presence detection device in a parking lot.

FIG. 4 is a read flow chart of a detection signal of a detection unit in each device.

FIG. 5 is a block diagram for explaining a conventional distributed control device.

[Explanation of symbols]

 10 Control Panel 11 Control Section of Control Panel 12 Storage Section of Control Panel 100,200 Equipment 110,210 Equipment Control Section 120,220 Equipment Storage Section

Claims (2)

[Claims] 1. A control panel and a plurality of devices are connected in a loop, the control panel has a control unit for transmitting an address setting command and a reference address, and each device inputs an address setting command. A control unit that adds or subtracts a predetermined numerical value to the address sent by and sends it to the next device,
A distributed control device, comprising: a storage unit that stores an address that is transmitted or an address of a next device that transmits. 2. The distributed control device according to claim 1, wherein the control panel has a storage unit that stores an address when an address setting command and the address are transmitted from the final device.