JPH0685552U - Multiplex communication system - Google Patents

Abstract

(57) [Summary] [Purpose] Abnormalities such as address setting mistakes and connection mistakes of slave units can be detected by the master unit and slave units. [Structure] A master unit 1, a slave unit input device 2, and a slave unit display device 3 are connected to each other through a communication line 4. The master device 1 includes a test switch 5, a communication unit 6 that outputs a test signal by the test switch 5, a control unit 7 that controls the test switch 5 and the communication unit 6, and a display unit 8 that displays data. The slave unit input device includes an input unit 9 for inputting various alarms, and a communication unit 10 for communicating data input to the input unit 9 to the master unit 1 according to an instruction from the master unit 1.
And a control unit 11 that controls the input unit 9 and the communication unit 10, an address setting unit 12 that sets an address, and a test switch 13, and the handset display device 3 displays the data input by an instruction from the base unit 1. Display unit 14 for displaying and base unit 1
The communication unit 15 for communicating with each other, the control unit 16 for controlling the display unit 14 and the communication unit 15, and the address setting unit 17 for setting an address.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multiplex communication system for performing multiplex communication between a master unit and a slave unit via a communication line.

[0002]

[Prior art]

 Conventionally, there is a local area network system as a multiplex communication system for performing multiplex communication between a master unit and a slave unit via a communication line. This system is installed in a building or in the same premises. For example, a master unit that controls the entire communication is installed on the first floor, and a plurality of slave units controlled by the master unit are installed on each floor. It is connected by a communication line. Then, the data is multiplexed by the time division method, and serial communication is performed between the master unit and the slave unit via the communication line. In this multiplex communication system, the maximum number of system addresses is set in the master unit, the number of addresses is set in the slave unit input device, and the number of addresses corresponding to the input device is set in the slave unit display unit. Specify the child device to communicate with and perform multiplex communication.

[0003]

[Problems to be solved by the device]

 However, the conventional multiplex communication system described above has the drawbacks that, because an address is set for each device, communication cannot be performed if there is an address setting error, and it is difficult to know which device has the address setting error.

Further, there is a drawback that it is not known whether the address of the display device is set corresponding to the address of the input device.

Further, there is a drawback that an error cannot be recognized until communication is made with a device having an address setting error.

[0006]

In view of the problems of the above-mentioned conventional multiplex transmission system, an object of the present invention is to detect an abnormality such as an address setting error or a connection error of a slave unit in the master unit and the slave unit. The configuration is such that, in a multiplex communication system for performing multiplex communication between a master unit and a slave unit via a communication line, the master unit has a test switch, a communication unit for outputting a test signal by the test switch, and It is equipped with a control unit that controls the test switch and communication unit, and a display unit that displays data.The slave unit consists of a slave unit input device and slave unit display device. An input unit for inputting, a communication unit for communicating data input to the input unit to the base unit according to an instruction from the base unit, a control unit for controlling the input unit and the communication unit, and an address for setting an address. Setting section and test The slave unit display device includes a display unit that displays data input by an instruction from the master unit, a communication unit that communicates with the master unit, a control unit that controls the display unit and the communication unit, and an address unit. The operating state of the multiplex communication system is automatically determined and the state is displayed.

[0007]

[Action]

 When the installation of the multiplex communication system is completed, the test switch of the master unit is turned on, and the test signal is transmitted from the communication unit in the order of address according to the control signal from the control unit. The slave unit input device and slave unit display device receive the test signal sent from the master unit, judge whether the address is the same as the preset address, and if they are the same, each control unit for the master unit. A reply is sent from each communication unit in response to a signal from. The master unit performs this operation until the end of all addresses, and if there is a slave unit that does not respond, it stores the address and type of the slave unit and displays them in order on the display section after the test communication operation is completed. Further, when there is no child device which does not respond, the normal operation is started. Also, by turning on the test switch of the child device input device, communication with the parent device is performed, and if the communication is normal, the parent device communicates with the child device display device that it is normal, and the child device The machine display device receives the communication and displays it on the display unit.

[0008]

【Example】

 1 to 5 show a first embodiment of a multiplex communication system according to the present invention. The present invention will be described below with reference to these drawings.

The present multiplex communication system is composed of a master unit 1, a slave unit input device 2, and a slave unit display device 3, which are connected by a communication line 4. The master device 1 includes a test switch 5, a communication unit 6 that outputs a test signal by the test switch 5, a control unit 7 that controls the test switch 5 and the communication unit 6, and a display unit 8 that displays data. The slave input device includes an input unit 9 for inputting various alarms, a communication unit 10 for communicating data input to the input unit 9 to the master unit 1 according to an instruction from the master unit 1, and an input unit. 9 and the communication unit 10, a control unit 11 for controlling the communication unit 10, an address setting unit 12 for setting an address, and a test switch 13 are provided, and the handset display device 3 displays the data input by an instruction from the base unit 1. The display unit 14 includes a communication unit 15 that communicates with the base unit 1, a control unit 16 that controls the display unit 14 and the communication unit 15, and an address setting unit 17 that sets an address.

When the installation of the multiplex communication system is completed, the test switch 5 of the base unit 1 is turned on, and the test signals are transmitted from the communication unit 6 in the order of addresses according to the control signal from the control unit 7. The cordless handset input device 2 and the cordless handset display device 3 receive the test signal transmitted from the cordless handset 1 and judge whether the address is the same as the preset address. In response to the signals from the control units 11 and 16, a reply is sent from the communication units 10 and 15. The master unit 1 performs this operation until the end of all addresses, and if there is a slave unit that does not respond, stores the address and type of the slave unit, and displays them in order on the display unit 8 after the test communication operation ends. Also, if there is no child device that does not respond, it shifts to normal operation. Also, by turning on the test switch 13 of the child device input device 2, communication is performed with the parent device 1, and if the communication is normal, the parent device 1 is normal to the child device display device 3. The slave display device 3 receives the communication and displays it on the display unit 14.

[0011]

[Effect of device]

 As described above, the multiplex communication system of the present invention is a multiplex communication system for performing multiplex communication between a master unit and a slave unit via a communication line.In the master unit, a test switch and a test signal by the test switch are provided. The communication unit for outputting, the control unit for controlling the test switch and the communication unit, and the display unit for displaying data are provided, and the slave unit is composed of a slave unit input device and a slave unit display device. The machine input device includes an input unit for inputting various alarms, a communication unit for communicating data input to the input unit to the master unit according to an instruction from the master unit, and a control for controlling the input unit and the communication unit. Unit, an address setting unit for setting an address, and a test switch, and the slave unit display device displays a data input by an instruction from the master unit, a communication unit for communicating with the master unit, Display and It is equipped with a control unit for controlling the receiver unit and an address setting unit for setting an address, and automatically determines the operating state of the multiplex communication system and displays the state, thereby making an address setting error or connection error of the slave unit. This has the effect of making it easy to identify the abnormality in the master unit and the slave unit.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a multiplex communication system according to the present invention.

FIG. 2 is a flowchart of a multiplex communication system according to the present invention.

FIG. 3 is a block diagram of a master unit of the multiplex communication system according to the present invention.

FIG. 4 is a block diagram of a slave unit input device of the multiplex communication system according to the present invention.

FIG. 5 is a block diagram of a slave unit display device of the multiplex communication system according to the present invention.

[Explanation of symbols]

1 ... Parent device, 2 ... Child device input device, 3 ... Child device display device, 4 ... Communication line, 5 ... Test switch,
6 ... communication section, 7 ... control section, 8 ... display section, 9
... Input unit, 10 ... Communication unit, 11 ... Control unit,
12 ... Address setting section, 13 ... Test switch, 14 ... Display section, 15 ... Communication section, 16 ...
Control unit, 17 ... Address setting unit.

Claims (1)

[Scope of utility model registration request] 1. In a multiplex communication system for performing multiplex communication between a master unit and a slave unit via a communication line, the master unit has a test switch, a communication unit for outputting a test signal by the test switch, and the test. A control unit that controls the switch and the communication unit, and a display unit that displays data are provided, and the child device is configured by a child device input device and a child device display device.
The slave unit input device includes an input unit for inputting various alarms, a communication unit for communicating data input to the input unit to the master unit according to an instruction from the master unit, and a control for controlling the input unit and the communication unit. Unit, an address setting unit for setting an address, and a test switch, the slave display device displays a data input by an instruction from the master unit, a communication unit for communicating with the master unit, and A control unit for controlling the display unit and the communication unit, and an address setting unit for setting an address,
A multiplex communication system characterized by automatically determining the operating state of the multiplex communication system and displaying the status.