JPS59139401A - Dual system of telemetry controller - Google Patents

Abstract

PURPOSE:To facilitate the maintenance and to improve the reliability by allowing the first and the second telemetry controllers, which are provided together, to recognize different numbers of call signals to transmit and receive a measured value and etc. CONSTITUTION:A telemetry controller 3 of a slave station is connected to a master station 1 through a communication line and a hybrid device 2, and the call signal from the master station 1 is recognized to transmit and receive a measured value A or a control signal B. The telemetry controller 3 of the slave station consists of devices 3-1 and 3-2 provided together, and the call signal from the master station 1 is received in respective receiving parts 4-1 and 4-2 and counters 5-1 and 5-2, and the control signal B is sent to a required sensor through transmission control parts 7-1 and 7-2, and measured data A is sent to the master station through transmitting parts 6-1 and 6-2. Numbers of calls in counters 5-1 and 5-2 are set to an odd and an even respectively; and if response is not attained for the first call but response is attained for the second call (even call), it is judged that the device 3-2 is normal but the device 3-1 is abnormal.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention is connected to a master station via a communication line, recognizes a calling signal from the master station, and exchanges measured values or control (with No. M) between the master station and the master station. This invention relates to a redundant system for remote measurement control devices that perform transmission and reception.

())) Background of the Technology A remote measurement control device is known as a means of knowing measured values at measurement points located in remote locations. An example of this remote measurement control device is a power monitoring system that transmits the amount of power generation, supplied power, voltage, current, or operating status information to a master station.

In the event of a breakdown, prompt maintenance is often not necessary, so a method has been adopted in which devices are installed in parallel as a countermeasure against failures of this remote measurement control device (hereinafter referred to as the device).
From something as simple as automatically switching to another device if the fuse of one device is blown for some reason,
There is a method in which switching devices are placed in both devices and switching is performed using a control signal from the master station. The former has the disadvantage that the failure is limited to a blown fuse, while the latter has problems in dealing with it because it is impossible to immediately determine which of the moving devices is causing the failure, and the device switching device is complicated.・It had the disadvantage of being expensive.

(d) Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, it is an object of the present invention to provide a redundant system for remote measurement and control devices that can constantly identify which device is experiencing a failure and can be manufactured at low cost. The purpose is to

(e) FiIII development of the invention Simply stated, the present invention provides a system in which a master station sends a calling signal multiple times to a slave station remote measuring control device when it is not possible to send and receive a calling signal to the remote measuring control device. 2 remote measurement control devices are installed in parallel, and each of the remote measurement control devices is provided with a means for recognizing the different number of call signals. The device is characterized in that measured values or control signals are exchanged.

IF) Embodiment of the Invention IJ Shimogi An embodiment of the present invention will be explained in detail with reference to the drawings. The figure is a block diagram of an embodiment showing a duplication system of a remote measurement control device according to the invention.

In the figure, ■ is a master station, 2 is a vibe sword device (branching device), 3-1 and 3-2 are remote measurement control devices (hereinafter referred to as devices), 4-1 and 4-2 are receiving units, 5, -1 and 5-2 are counters, 6-1 and 6-2 are transmitters, and 7-1 and 7-2 are transmission control units, respectively. The parent 2 station 1 is connected to the branching device ht2 via a communication line, and the branching device 2 and the device 3-1 are connected. A device 8-2 is installed in parallel with this device 3-1, and the devices iJ 3-1 and 3-2 constitute one slave station.

The device 3-1 will be explained below. Device 3-1 is the master station
The receiving unit 4-1 receives the paging signal, and if the signal is addressed to the own station, the counter 5-1 is notified of the fact.This counter 5-1 is a counter that counts the number of times the paging signal is called. If the number of times is an odd number, the output signal is sent to the transmitter 6-1 and the transmission controller 7-1. The transmission control section 7-1 has a function of converting input measurement data A into serial and parallel data, and sends this measurement data to the transmission section 6-1. The transmitter 6-1 transmits this measurement data to the master station in response to an input permission signal based on the above-mentioned counter output signal.

The above is the case where the device 3-1 transmits the measurement data, and when the master station l sends the control and signal, the receiving section 4-1 counter 5
-1. Transmission control unit through? -1, and sends this control signal B to the required sensor.

The only difference between the parallel device 3-2 and the device 3-1 is the operation of the counter 5-2, and this counter 5-2 will be described below. This counter 5-2 outputs an output signal when the number of calls is an even number. Therefore, the master station 1 sends a paging signal to the required slave station, and if there is a response to the first paging signal, the device 3-1 is operating normally, and if there is no response, the second paging is performed. If there is a response, it is known that the device W13-2 is currently normal and the device 3-1 is abnormal.

The counters 5-1 and 5-2 described above are reset if there is no calling signal addressed to the local station for the required time, or they may be reset by a calling signal to another station. The following explanation uses a counter, but as mentioned above, there is no problem even if you use a decoder, for example, which operates based on the number of calls.The above explanation is based on the assumption that there is only one slave station. Needless to say, there is no problem even if there are multiple slave stations.

■ Effects of the Invention As explained in detail above, the redundant method of the remote measurement control device of the present invention not only can identify a device in which a failure has occurred at any time, but also can be manufactured at low cost using easily available counters. Improved reliability and ease of maintenance of remote measurement control systems First half 1. There will be many.

[Brief explanation of the drawing]

The figure is a block diagram of an embodiment showing a duplex system of a remote measurement control device according to the present invention. In the figure, ■ indicates a master station,
3-1 and 3-2 are remote measurement control devices, and 5-1 and 5-2 are counters, respectively.

Claims (1)

[Claims] Measurement 1 between the master station and the master station! Alternatively, it is a duplex system for remote measurement and control equipment that sends and receives control signals. A second remote measurement control device is installed in parallel with the remote measurement control device, and a means for recognizing a different number of call signals is attached to each of the two remote measurement control devices. A dual system for a grip distance measurement and control device, characterized in that the measurement and control device sends and receives the measurement value or control signal.