JPH03167937A - Time division multiplex transmission system - Google Patents

Abstract

PURPOSE:To save data entry job by connecting a simulated terminal equipment simulating the operation of plural terminal equipments to a transmission line and using a data set with one data setting section as a data set by other data setting section via a recording medium. CONSTITUTION:A 1st data setting section 1 sets the configuration of terminal equipments B1-BN to a central monitor controller A and writes the data to a recording medium 4. Then the recording medium 4 is read by a 2nd data setting section 2 to set the configuration of the terminal equipments B1-BN to a simulated terminal equipment 3 based on the entirely same data. Thus, the data set to the central monitor controller A and the simulated terminal equipment 3 are completely coincident with each other. Moreover, the data entry job to the simulated terminal equipment 3 is not required as in the case of a conventional method.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a time division multiplexing (transmission system) equipped with a pseudo terminal device, for example, in a building management system, where no actual terminal device is connected. It is used to inspect the operation of a central monitoring and control unit under certain conditions.

[Prior Art 1] FIG. 3 is a schematic diagram of a conventional general time division multiplex transmission system. In this system, one central monitoring and control device A and a plurality of terminal devices B. , B2, . . . BN are connected via a two-wire transmission line L such as a coaxial cable or twisted bare wire. Figures 4(a) and (b) show time division multiplexed transmission signals sent from the central monitoring and control device A to the transmission line L, and the central monitoring signal sent from the terminals BB2, . . . , BN via the transmission line L. The waveforms of reply signals sent back to control device A are shown. The time division multiplex transmission signal has a start pulse S in its 1 frame PR, which indicates the start of signal transmission.
T and the terminal device Bi (i=1.2...N
) and an address pulse AD for specifying the terminal B1.
control pulse DT for controlling the operation of the terminal Bi
and a reply standby pulse RT for receiving a reply signal from. The address pulse AD and control pulse DT are composed of multi-bit serial signals in which, for example, a long voltage pulse means "1" and a short voltage pulse means "O". In the reply standby pulse RT, for example, the central supervisory control device A
By applying a voltage between the lines of the transmission line IIL on the terminal Bi side and short-circuiting the lines of the transmission line L via a resistor on the terminal Bi side, for example, a long current pulse is set to "1" and a short current pulse is set to "1". 0”
A multi-bit serial signal indicating . Address pulse AD and control pulse DT
is sent out from the central supervisory control unit A as a low-impedance voltage signal, and each terminal device Bi receives its operating power by connecting a rectifier and a smoothing capacitor between the transmission lines L. The address pulse AD included in the time division multiplex transmission signal sent from the central supervisory control device A changes so as to poll each terminal device Bi cyclically, and only one terminal device Bi with a matching address is polled. performs control operations and reply operations. Terminal Bi is transmission line L
When a start pulse ST is received from , a subsequent address pulse AD is received and compared with its own address. If the addresses do not match, the next start pulse ST
wait for it to be received. If the address pulse AD matches its own address, it receives the subsequent control pulse DT, and performs a control operation in accordance with this control pulse DT.

Furthermore, a reply signal (monitoring pulse) as shown in Fig. 3(b) is sent out with a reply standby pulse RT following the control pulse DT.

When using the above-mentioned time division multiplex transmission system, for example, in a building management system, terminal equipment compatible with various building equipment is required depending on the type and quantity of building equipment determined by the purpose and size of the building. It is necessary to connect Bi to the transmission line L and store the configuration of the connected terminal Bi in the memory table of the central supervisory control device A. For example, N=25
In the case of 6, for i=1 to 256, whether or not the terminal Bi is connected is stored, and if the terminal Bi is connected, its type is stored. If the terminal Bi is not connected, polling of its address can be omitted, so that the cycle of supervisory control by the central supervisory control device A can be shortened. Also, the type of terminal Bi is
For example, there are terminals for controlling air conditioning loads and lighting loads, terminals for monitoring crime prevention sensors and fire detectors, terminals that require frequent status monitoring, etc. This data indicates the distinction, and the central monitoring and control device A performs monitoring and control operations according to the type of each terminal Bi.

[Problems to be Solved by the Invention] By the way, when testing the operation of the central monitoring and control device in a factory or the like, it is difficult to connect all the actual terminal devices. Therefore, a pseudo terminal device that simulates the operation of an actual terminal device is connected to the transmission line, and this pseudo terminal device is used to test whether the central monitoring and control unit operates normally. To do so, it is necessary to accurately set whether or not a terminal device is actually connected, and if a terminal device is connected, its type. However, in the past, pseudo-terminal devices were manually configured by entering input from a keyboard, which was prone to input errors, and the configuration of the terminal device stored in the central monitoring and control unit and the settings for the pseudo-terminal device were easily made. There were cases where the configuration of the terminal device differed. in this case,
Control data and monitoring data were sometimes not exchanged accurately, which sometimes caused trouble in testing the operation of the central monitoring and control device.

The present invention has been made in view of these points, and its purpose is to easily and accurately set a pseudo terminal device for testing the operation of a central supervisory control device in a time division multiplex transmission system. It is to make it.

[Means for Solving the Problems] In the present invention, in order to solve the above problems, the first
As shown in FIGS. 4 to 4, a plurality of terminals B,,B2,...B. is connected to the central supervisory control unit A via a common transmission line L, and each terminal Bi(i
In a time division multiplex transmission system in which a control pulse DT is transmitted to a central monitoring and control device A (=1.2,...,N), and a monitoring pulse is sent back from each terminal Bi to a central monitoring and control device A, B l, B 2 ,...,BN
A pseudo terminal device 3 that simulates the operation of is connected to the transmission line L,
A first data setting unit 1 that sets the presence/absence and type of each terminal device B + , B 2 . . . , BN in correspondence with an address in the central monitoring and control device A;
..., a second data setting section 2 that sets the presence/absence and type of BN in the pseudo terminal device 3 in correspondence with an address; and a second data setting section 2 into which the data set in one data setting section is written; The device is characterized in that it includes a recording medium 4 that can be read out by. [Operation] In the present invention, as described above, the first data setting section 1
The data set in the central monitoring and control device A by
Among the data set in the pseudo terminal device 3 by the data setting unit 2 of In addition to saving labor, it is possible to completely match the data set in the central monitoring and control device A and the pseudo terminal device 3, and to easily and accurately set the data.

[Example code] FIG. 1 is a schematic diagram of an embodiment of the present invention.

A central monitoring and control device A is connected to the transmission line L, and a pseudo terminal device 3 is also connected to the transmission line L in place of the plurality of terminal devices B, -BN. In the memory table of the central monitoring and control device A, each terminal B. ~The presence/absence and type of BN are stored in association with the address. Also,
In the memory table of the pseudo terminal device 3, the presence/absence and type of each terminal device 81 to BN are stored in association with the address by the second data setting section 2. The first and second data setting sections 2 are composed of, for example, personal computers,
4 capable of writing data to and reading data from the recording medium 4 such as a floppy disk;
In this embodiment, the first data setting section 1 sets the configuration of the terminals B1 to BN in the central monitoring and control device A, and writes the data to the recording medium 4. Then, this recording medium 4 is read by the second data setting section 2, and the configurations of the terminals 81 to BN are set in the pseudo terminal device 3 based on exactly the same data. Therefore, the central supervisory control device A
and the data set in the pseudo terminal device 3 completely match6.Furthermore, it is no longer necessary to manually set data for the pseudo terminal device 3 as in the past.

FIG. 2 shows the internal configuration of the pseudo terminal device 3 of this embodiment. This pseudo terminal device 3 includes a multiplex transmission signal processing section 31
, a transmission data processing section 32 , and a communication processing section 33 . The multiplex transmission signal processing unit 3■ has a function of receiving a transmission signal as shown in FIG. 4(a) and transmitting a reply signal as shown in FIG. 4(b). The transmission data processing unit 32 includes a memory table in which the presence or absence of each terminal device 81 to B9 and its type are stored in correspondence with the address. When a terminal device with that address exists, the communication processing section 33 simulates the operation of the terminal device according to the type. It performs communication processing for transferring data to the memory table of the unit 32.

Note that the recording medium 4 is not limited to a floppy disk, but may be a memory card or a magnetic tape.

[Effects of the Invention] According to the present invention, in a time division multiplex transmission system, a pseudo terminal device that simulates the operation of a plurality of terminal devices is connected to a transmission line, and the presence or absence and type of each terminal device are associated with an address. The first setting to be set on the central monitoring control device and the pseudo terminal device respectively.
and a second data setting section, and the data set by one data setting section is used as the data set by the other data setting section via a recording medium.
Data input work is saved, and the data set in the central monitoring and control device and the pseudo terminal device completely match.
This has the effect that the operation of the central supervisory control device can be accurately inspected.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is a block diagram of a pseudo terminal device used in the same, FIG. 3 is an overall configuration diagram of a conventional general time division multiplex transmission system, and FIG. Figure 4 (
a) and (b) are waveform diagrams of a transmission signal and a reply signal used in the above, respectively. A is the central monitoring and control device, B,, B2+..., Bi,...
...+ B N is a terminal device, L is a transmission line, 1 is a first data setting section, 2 is a second data setting section, 3 is a pseudo terminal device, and 4 is a recording medium.

Claims (1)

[Claims] (1) A plurality of terminal devices assigned unique addresses are connected to the central monitoring and control device via a common transmission line, and control pulses are transmitted to each terminal device according to the address specification from the central monitoring and control device, and In a time division multiplex transmission system in which each terminal device returns a monitoring pulse,
a first data setting unit that connects a pseudo terminal device that simulates the operation of a plurality of terminal devices to a transmission line, and sets the presence or absence and type of each terminal device in a central monitoring and control device in correspondence with an address;
A second data setting section that associates the presence or absence and type of each terminal device with the address and sets it in the pseudo terminal device, and a record into which the data set by one data setting section is written and read by the other data setting section. A time division multiplex transmission system comprising a medium.