JPH02143797A - Mode analyzer - Google Patents

Abstract

PURPOSE:To easily specify a fault occurrence location of a system by using a mode display lamp so as to grasp the operating state. CONSTITUTION:A signal reception circuit 20 of a mode analyzer accesses terminal equipments 2, 3, 7-9 sent from a central control unit 1 and receives a transmission signal Vs applying time division multiplex transmission to a monitor data and a control data via a signal line 4. A signal processing circuit 21 decides the mode data of the received transmission signal Vs sequentially, stores the result in a mode buffer and displays whether or not the transmission signal Vs of various operation mode is received normally by the lighting of mode display lamps 22a-22f. Thus, the operating state of a remote monitor control system is grasped by the lighting state of the mode display lamps 22a-22f. Thus, the fault occurrence location of a system is specified easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mode analyzer for checking signals transmitted via signal lines of a remote monitoring and control system.

[Prior Art] Conventionally, there have been remote monitoring and control systems that time-division multiplexed transmission of monitoring data and control data as shown in FIGS. 4 to 6. That is, as shown in Figure 5,
A central control unit 1, a unique address is set, and a switch 8
1 to S4, a plurality of monitoring terminals 2, loads L1 to
A control terminal 3 for controlling L4, a wireless relay terminal 7, an external interface terminal 8, and a pattern setting terminal 9 are connected by a pair of signal lines 4.

Here, the transmission signal Vs sent from the central control bag W11 to the signal line 4 includes a start pulse signal ST indicating the start of signal transmission, mode data MD indicating the signal mode, and a signal as shown in FIG. 5(a). Fixed data LD and page data PD that distinguish formats, terminal devices 2.3.7 to 9
8-bit address data AD to call, load L1~
Control data CD and checksum data C for controlling L.
It is a bipolar (±24V) time-division multiplexed signal consisting of a return waiting period signal WT that sets the return period from 8 and terminals 2.3.7 to 9, and data is transmitted by pulse width modulation. It has become. In each terminal device 2, 3.7 to 9, when the address data AD of the transmission signal Vs received via the signal line 4 matches its own unique address data, it takes in the control data CD of the transmission signal v3. , the monitoring data (switch state or load-like IQ) is returned as a current mode signal (a signal sent by short-circuiting the signal lines 4 through an appropriate low impedance) in synchronization with the return standby signal WT of the transmission signal Vs. It is supposed to be done.

The central control device 1 also includes a dummy signal transmitting means for constantly transmitting the mode data MD and a dummy mode transmission signal Vs, any of the monitoring terminal 2 or the wireless relay terminal 7, the external interface terminal 8, When an interrupt signal Vi as shown in FIG. 5(b) returned from the pattern setting terminal 9 is received in synchronization with the start signal ST, it is monitored from the interrupt generation terminals 2.7 to 9 by interrupt processing. Interrupt handling means are provided for returning data. This interrupt processing means sends out a probe mode transmission signal Vs for accessing the terminals 2.7 to 9 by group (transmitting the upper 4 bits of the unique address), and setting the interrupt flag in the accessed group. Return the addresses of terminals 2.7 to 9 (return the lower 4 bits of the unique address),
Identify the terminals 2.7 to 9 that generated the interrupt (synthesize the upper 4 bits of the unique address at the time of group access and the lower 4 bits of the returned unique address), and
9 is accessed using the transmission signal Vs in the individual access mode, and the switch monitoring data is returned.
When the switch monitoring data is normally received, an interrupt release mode transmission signal Vs is transmitted, the interrupt flag is reset, and the interrupt processing is ended. In addition, the central control device 1 receives the monitoring data sent back to the central control device 1 from the monitoring terminal device 2, the wireless relay terminal device 7, the external interface terminal device 8, and the pattern setting terminal device 9 through the above-mentioned interrupt processing. Based on the corresponding load, create control data for controlling L4 by M, and time-division multiplex transmit and load the control data to the corresponding control terminal 3 using the transmission signal Vs in the individual access mode, - L4, and at this time, the monitoring data of the load state is returned from the control terminal 3 during the return period set by the return waiting period signal WT.

As shown in FIG. 6, the wireless relay terminal device 7 is a terminal device that relays data in an optical wireless system consisting of an optical wireless transmitter Y, an optical wireless receiver X, and a wireless signal line 4a, and is used for optical wireless transmission. The optical signal transmitted from device Y is received by optical wireless receiver X,
The received data is received via the wireless signal line 4a, and this data is transferred to the central control device 1.

Further, the external interface terminal 8 is a terminal that performs data transmission with the external control device 8a, and the pattern setting terminal 9 inputs pattern control data input from the data input section 9a to the central control bag y11. This is the terminal device for the transfer. The monitoring terminal 2 and the control terminal 3 installed in the distribution board 6 or relay control panel 6a have the dimensions agreed upon in the distribution board, and their control output enables the remote control relay for load control. (Also turned on by hand switch,
A latching relay (5) that can be turned off is controlled.

[Problems to be Solved by the Invention] By the way, in the above-mentioned remote monitoring and control system, the mode of the transmission signal Vs is set by the mode data MD of the transmission signal VS sent from the central control device 1, and various operations are performed. However, under normal usage conditions, the above operation mode is not known and the switch S,
The corresponding load, ~L, is simply controlled remotely by the operation of ~S. Therefore, the switch S I""
-S <Or, if a system abnormality occurs due to a failure of loads L1 to L4, failure of the central control unit 1 or terminal devices 2.3.7 to 9, etc., it becomes troublesome to identify the location of the abnormality. There was a problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a mode analyzer that can easily identify the location where an abnormality occurs when a system abnormality occurs.

[Means for Solving the Problems] The mode analyzer of the present invention includes a central control device, a plurality of monitoring terminals to which unique addresses are set and which monitor operation switches, and a plurality of monitoring terminals to which unique addresses are set and which control loads. The control terminals are connected via a pair of signal lines, and the central control unit accesses each terminal to transmit monitoring data and control data via time division multiplexed transmission via the signal lines of the remote monitoring and control system. A mode analyzer that checks the mode of a transmitted signal, which includes a signal receiving circuit that receives the transmitted signal, a signal processing circuit that determines the mode of the received transmitted signal, and a mode display lamp that displays the determined mode. It is equipped with the following.

[Function] The present invention is configured as described above, and is configured to access each terminal from a central control device and transmit monitoring data and control data via time-division multiplexing via signal lines of a remote monitoring and control system. A mode analyzer that checks the mode of a transmission signal transmitted by a computer, and includes a signal receiving circuit that receives the transmission signal, a signal processing circuit that determines the mode of the received transmission signal, and a mode that displays the determined mode. The system is equipped with an indicator lamp, and the mode indicator lamp allows you to accurately understand the operating status of the system.
It is now possible to easily identify the location where the system abnormality occurs.

[Embodiment] FIGS. 1 and 2 show an embodiment of the present invention, which includes a central control unit 1 and a plurality of monitoring terminals each having a unique address and monitoring operating switches L, -L. 2 and a plurality of control terminals 3 for which unique addresses are set and that control the loads L1 to L are connected by a pair of signal lines 4, and each terminal 2.3 is accessed and monitored from the central control device 1. Transmission signal VS transmitted via signal line 4 of a remote monitoring and control system in which data and control data are time-division multiplexed
The mode analyzer is a mode analyzer that checks the mode of the transmission signal Vs, and includes a signal receiving circuit 20 that receives a transmission signal, a signal processing circuit 21 that includes a CPU that determines the mode of the received transmission signal Vs, and a light emitting device that displays the determined mode. It is equipped with mode display lamps 22a to 22f made of diodes.

Here, the mode display lamp 22a is a light emitting diode that is lit when the dummy mode transmission signal Vs that is always being transmitted is received, and the mode display lamp 22b is
The mode display lamp 22c, which is a light emitting diode, lights up when the transmission signal Vs of the interrupt cancellation mode that resets the interrupt flag set in the interrupt generation terminals 2.7 to 9 is received. The mode display lamp 22d, which is a light emitting diode that lights up when load status monitoring data is returned during the return waiting period of the transmission signal VS in the individual access mode, is the monitoring terminal 2.7.
The mode display lamp 22e, which is a light emitting diode that is lit when the monitoring data of the switch state is returned during the return waiting period of the transmission signal Vs of the individual access mode of ~9, searches for the interrupt generating terminals 2, 7 to 9. The mode indicator lamp 22f, which is a light emitting diode that lights up when the transmission signal Vs in the interrupt exploration mode is received, is a light emitting diode that lights up when the transmission signal Vs in the individual access mode of the control terminal 3 is received. be.

In addition, in the embodiment, a case 25 for housing each circuit.
In the figure, 26 is a signal line connection terminal to which the signal line 4 is connected.

On the other hand, as shown in FIG. 3, the case 25 is of a portable type,
It may be possible to connect to the signal line 4 using the alligator clip 27.

The operation of the embodiment will be described below. Now, in the signal receiving circuit 20 of the mode analyzer, a transmission signal Vs sent from the central control device 1 and accessing each terminal device 2, 3.7 to 9 and time-division multiplexing transmission of monitoring data, control data, etc. The signal processing circuit 21 sequentially determines the mode data of the received transmission signal Vs and stores it in a mode buffer, and displays the transmission signal of each operation mode by lighting the mode display lamps 22a to 22f. It is designed to display whether the Vs was received normally, so if a system error occurs,
Depending on the lighting status of the mode display lamps 22a to 22f,
The operating state of the remote monitoring and control system can be accurately grasped, and the location where the system abnormality occurs can be easily identified.

[Effects of the Invention] The present invention is configured as described above, and utilizes signal lines of a remote monitoring and control system in which each terminal device is accessed from a central control device and monitoring data and control data are transmitted via time division multiplexing. A mode analyzer that checks the mode of a transmission signal transmitted through a signal receiving circuit that receives the transmission signal, a signal processing circuit that determines the mode of the received transmission signal, and displays the determined mode. The system is equipped with a mode indicator lamp, and since the operating state can be accurately grasped by the mode indicator lamp, it is effective in easily specifying the location where an abnormality occurs in the event of a system abnormality.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of an embodiment of the present invention, FIG. 2 is an external perspective view of the same as above, FIG. 3 is an external perspective view of another embodiment, and FIG. 4 is a schematic configuration diagram of a remote monitoring and control system. FIG. 5 is an explanatory diagram of the same operation as above, and FIG. 6 is a schematic configuration diagram showing an example of the cast. 1 is a central control unit, 2 is a monitoring terminal, 3 is a control terminal, 4 is a signal line, 20 is a signal receiving circuit, 21 is a signal processing circuit, 22a to 22f are mode display lamps, S, to S,
is a switch, and L, ~L, is a load. Agent Patent Attorney Ishi 1) Choshichi

Claims (3)

[Claims] (1) A pair of signal lines connects the central control unit, multiple monitoring terminals that have unique addresses set and monitors operation switches, and multiple control terminals that have unique addresses set and that control loads. This is a mode analyzer that checks the mode of transmission signals transmitted via signal lines of a remote monitoring and control system that accesses each terminal from a central control unit and transmits monitoring data and control data via time division multiplexing. a signal receiving circuit that receives the transmission signal; a signal processing circuit that determines the mode of the received transmission signal;
A mode analyzer equipped with a mode display lamp that displays a determined mode. (2) The mode analyzer according to claim 1, characterized in that the case housing each circuit has dimensions agreed upon by the distribution board. (3) The mode analyzer according to claim 1, wherein the case housing each circuit is of a portable type.