JPS5914099A - Remote monitor/controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a remote monitoring and control device that individually monitors and controls a multiplex operation and monitoring panel and a plurality of terminal devices using time-division multiplexed signals. a sensor circuit that outputs an output and a scanning output indicating a digit of data;
A selection circuit that specifies the digit of the digital value that the main operation monitoring panel requests from the terminal device and determines the digit output from the sensor circuit by scanning output, latches and outputs the digital output signal, and a terminal device logic circuit section. a memory circuit that stores the output according to the scanning output and outputs the stored data to the arithmetic circuit; an arithmetic circuit that computes the output of the memory circuit and the digit data output of the sensor circuit and outputs the output to the comparison circuit; A comparator circuit that compares the output of the arithmetic circuit and the output of the setting circuit and outputs an output when the output of the arithmetic circuit is larger than the output of the setting circuit is installed in all terminals, and the digitally converted data is directly transmitted to the main operation monitoring panel. In addition to making it readable, all values at that time are memorized, the difference with new data is constantly checked, and when the difference has become larger, the main operation and monitoring panel is notified, and the setting circuit is also stored from the main operation and monitoring panel. The present invention relates to a remote monitoring and control device characterized in that it can be set.

The purpose of the present invention is that when all analog values are digitized and monitored via a terminal device, the values can be transmitted to the main operation monitoring panel more quickly, and the data can be confirmed from the terminal device on the main operation monitoring panel. Yes, K, and Ana 0
The objective is to make it possible to use it in cases where an alarm is triggered when the value exceeds or falls below a certain value.

Generally, in a remote monitoring and control device, a plurality of terminal devices +2+ and +21 are connected in parallel to one main operation monitoring panel +1+, and each terminal device +21 and +21 has a unique address, as shown in Fig. 1. have The main operation and monitoring panel (1) sends address signals and control signals to each terminal device +21 and [2+ in a time-sharing cyclic manner.
+ reads the signal from the main operation monitoring panel fl), and when the signal matches the address set on the terminal device (21, i21), it converts the signal of the monitoring input into information and outputs the signal from the main operation monitoring panel (fl). ) At the same time, the control signal accompanying the address signal is read and the relay (
3) Fully drive. The load of electrical equipment is controlled using the non-voltage relay contact (4) that turns on and off the relay (3). The main control panel +1) detects return signals from the terminals +21 and +2+ and monitors the status of the monitoring input.

Next, the main operation monitoring panel +1) is constructed as shown in FIG. In Fig. 2, +6) #'i The logic operation unit calculates the control data (8) based on the operation input from the operation input unit (6) and the terminal monitoring input from the reception determination unit (7). In addition to changing the signal, the display signal is calculated and displayed on the display section (8). Furthermore, it synchronizes with the transmission signal 1 of the transmission signal generation section (1Q), calculates the terminal address to be transmitted and its control data, and sends it to the transmission signal generation section (9). Transmission signal generator (
lO) is the address/control n sent from the logic operation unit (5)
It converts the signal into a transmission waveform and sends it to the transmission section 1n)K, and at the same time sends a synchronization signal to the logic operation section (5). The transmitter converts the signal sent from the transmitter signal generator (1o) into a transmitter 1g signal and sends it to the terminal device (2) via the signal line θ2.

The received signal detection section sends the return signal 1g sent from the terminal device (2) to the reception judgment section (7), and the reception judgment section 7) judges whether the return signal is correct data or not. If so, it is sent to the logic operation section (5).

Next, the terminal device (2) is configured as shown in Fig. 3, and the input from the signal line 02J is the power source for the logic circuit or the power source for driving the relay (3) from the terminal power converter section α. Become. -1 side, signal input, input protection section (l.

The signal is half-wave rectified and reduced to a low voltage, which becomes the input signal for the terminal logic circuit section (national government).This input causes the oscillation element section (the oscillating a comb to oscillate with a time constant determined by The output is counted as the signal of the logic control section.The logic control section controls the address judgment section and the control signal judgment B4, and outputs the address of the signal input and the control signal. The address judgment section checks whether the address signal is normal data and whether it matches the address of the address setting section (c), and if they match, sends a control gate signal to the return output section -. and also sends a signal to the logic control unit (e).IIIJ
The control signal judgment section checks whether the control signal is a normal signal, and if it is a normal signal, sends the signal to the logic control section, obtains a signal with a matching address, and activates the relay drive. Set the control data in output section 4. In the logic control unit, when the signals from the address determination unit (2υ and control signal determination unit 12) are complete, the return gate output at the timing of the return signal is sent to the return output unit (24)K,
Furthermore, the monitoring input reply section is operated. Between the monitoring input and reply sections, the status of the monitoring input from the monitoring section is converted into a signal based on the timing from the counter section, and the return output section e4I
send to The return output section converts all the signals from the monitoring input reply section and sends them to the signal line (also, in the logic control section, the address judgment section) and the signals from the control signal judgment section are completed. In this case, a relay drive pulse signal is sent to all the relay drive parts to create the timing to drive all the control latching relays, and the control latch relay is controlled to control the load (1/-4).
30).

4(a) to 4(f) show the operation time chart 1-1) of the above-mentioned remote monitoring and control device, and FIG. 4(a) shows the main operation monitoring panel (
The transmission signal is sent from the terminal device (2) from the terminal device (2) and is composed of a start signal, control address, control data, and return timing pulse. In the timing waveform of 2), the fourth
Figure (b) shows a control gate signal, which is output during the return timing when it matches the control address of the transmission waveform from the main operation monitoring panel +11. Figure 4(c) is the return signal output,
The entire return output section (c) is outputted from the monitoring input reply section (2) to the main operation monitoring panel +11. Figure 4(d) shows the control data output, and the control data sent from the main operation monitoring panel (1) at the return timing is sent to the relay drive latch output section (25).
Output to and latch. FIG. 4(e) shows a relay dry signal for driving a latching type relay, which is set for a certain period of time from the start signal of the next oscillation cycle after control data is set. Figure m4 (f) is the return gate output, which is set while the return signal output is being sent.

In such a remote monitoring and control device, when the terminal device (2) is fully operated to digitize the analog value and read the data, the number of digits of the digital value is 3 to 5 digits. At this time,
If the number of monitoring input pits of the terminal (2) is small, all the data cannot be read at once, so for example,
- It is necessary to read the data several times for each digit,
Furthermore, when reading the data, it is necessary to control the timing of data conversion from analog values to digital values so that the data does not change during reading.

However, when converted into a digital value, the lowest data has a value of approximately ±1 which is not important due to a conversion error. Furthermore, data changes are extremely small compared to normal read intervals, and there is no need to always read data.

In remote monitoring and control equipment using time-division multiplexed signals, monitoring of such analog values and other monitoring and control that require high speed are mixed, and by shortening the processing time of analog values, , the influence on other high-speed monitoring and control is reduced.

The present invention has been made in view of this point, and will be explained in detail below with reference to Examples.

In FIG. 5, (1~ are the terminal device logic circuit sections, which are the logic circuit sections in the terminal device (2) described above, and the main operation monitoring panel +1
It has a control output and a monitoring input that are individually controlled and monitored from 1 to each terminal (2). An example is a sensor circuit, which is converted from an analog sensor (not shown) into an analog digital signal.
Furthermore, in order to display the converted digital value, a digit data output signal that cyclically outputs each digit in a time-division manner and a scanning output signal that indicates the digit of the data being output are output. Data conversion from the analog sensor is performed when an input is input to the data conversion input, and when there is no input, the converted digital value continues to be output. @2 is a selection circuit, which selects the main operation monitoring panel f among the control outputs of the terminal logic circuit section 0@.
The digital value at that time is determined by the designation of the digit of the digital value that 1+ requests from the terminal (2) and the digit data output signal full scan output signal cyclically output from the sensor circuit FNr (31). Latch and output the output signal. (B3) is a memory circuit, - is an arithmetic circuit, (to) is a comparison circuit, - is a setting circuit, η is a carry down store circuit, 鈥檚 is an inversion circuit, - is the first timing circuit, and Kagome is the second timing circuit. Timing circuit, circle is the first latch circuit, (4 rumor is the second latch circuit.

Now, when reading the output data of the sensor circuit @υ, the output data is given to the output 1 of the terminal logic circuit section H as an individual control signal from the main operation monitoring panel +1). The selection circuit β power is determined by the output 1 from the terminal logic circuit section θ6), that is, the digit number read from the t-sensor circuit by the main operation monitoring board [1].
Among the data of each digit from the sensor circuit 0υ, data that matches the output 1 is latched and output to the input 1 of the terminal device logic circuit section (18). The main operation monitoring panel (1) outputs 1 in this state.
, and read out the output data of the sensor circuit fal+. At this time, the output 2 of the terminal logic circuit section O is
It is input to the memory circuit and the sensor times FjI! r611) according to the digit output of the scanning output signal. Terminal logic circuit section (input 2 is set by output 4 of one phrase, and a monitoring signal can be unconditionally sent to the main operation monitoring panel fl)K.

Next, in the normal operating state, the digit data output signal from the sensor circuit (product) is input to the arithmetic circuit (product) K, and the arithmetic circuit diagram shows the output of the memory circuit and the sensor circuit 6 digit data output signal. and sends the output to the comparator circuit. The data output of the memory circuit corresponds to the scanning output signal of the tnia"j circuit section), and outputs an output corresponding to the output 2 of the terminal device logic circuit section. An example of the arithmetic circuit is the scanning output signal of the sensor circuit c111. Depending on the digit of the signal, the output of the subtraction from the lower to the upper digit is input to the casdoor circuit η, and the η of the casdoor circuit holds the digit output, and the output of the digit during subtraction of the upper digit is Calculated as a down input.If a down-down output occurs during the subtraction of the highest order, that output and the output of the first timing circuit (sub) which inputs the scanning output signal and sends a pulse output at the timing of the most-order subtraction. From K, inverting circuit M
Input K large and invert. The arithmetic circuit (goods) inputs the output between the inverting circuits as an arithmetic control input, and the sensor circuit c111
The direction of subtraction between the input from the memory circuit and the input from the memory circuit is reversed. The comparison circuit 6i19 compares the output of the arithmetic circuit (goods) and the output from the setting circuit example, and when the output from the arithmetic circuit example is larger than the output from the setting circuit (g), the output is transferred to the first latch circuit. Send as data of (41). At this time, the setting value of the setting circuit ■ is the output 3 of the terminal device logic circuit section H.
You can configure more settings. The first latch circuit (41) latches the output of the comparator circuit by the output of the first tie-in circuit. In other words, data whose highest subtraction result is larger or smaller than the set value is latched. The second latch circuit←2 is the first
When there is no carry down output at the output timing of the most significant digit from the timing circuit (41), the output of the first latch circuit (41) is latched. When the most significant digit is not downgraded, the output of the comparator circuit latches whether tl is greater than or smaller than the set value if the subtraction is positive. This second latch circuit i4'4
The output is inputted to input 2 of the terminal device logic circuit section 06), and only when this input is set, the main operation monitoring panel fx) sends and returns the monitoring input individually to the terminal device (2). However, when the output is set for output 4 of the terminal device logic circuit section α, the monitoring input is sent back in the same way. Second latch episode FI! The output of r@2 is simultaneously sent to the second timing circuit, and when the output is not set, that is, the difference between the output of the memory circuit and the output of the sensor circuit υ is the output of the setting circuit @Q. When the output is smaller than the output, the second timing circuit 141 converts the analog 0 value to the digital value with respect to the sensor circuit unit υ! ::/Create and sensor times 1
fill). As described above, in order to send the data of the memory time MU from the main operation monitoring panel (1), the main operation monitoring panel fl
), but since the main operation and monitoring board [1] sends the read values back to the memory circuit (g), even if the main operation and monitoring board fl) misreads the information from the terminal, all of the In order to send the data to the terminal device (2) and compare it with new data, the data can be confirmed with respect to the terminal device (2) on the main operation monitoring panel t1). Also, by taking relatively large data in the setting circuit and setting the value in the memory circuit (to) to the upper or lower limit value of all analog zero values, for example, the analog zero value can be made to be above or below a certain value. It can be used to issue an alarm when something happens.

As stated on paper, the present invention allows the main operation monitoring panel to directly read the digitally converted data, stores the current value, and constantly checks the difference with new data to ensure that the difference is not too large. This is communicated to the main operation and monitoring panel, and the setting circuit can be set from the main operation and monitoring panel, so when analog zero values are digitized and monitored via a terminal device, the values can be transferred to the main unit more quickly. In addition to being able to transmit to the operation monitoring panel,
This has the advantage that it is possible to check data on the terminal device of the main operation monitoring panel, and it can also be used to issue an alarm when the analog value exceeds or falls below a certain value.

[Brief explanation of the drawing]

Fig. 1 is a basic circuit diagram of a general remote monitoring and control device, Fig. 2 is a block circuit diagram of the main operation and monitoring panel shown above, Fig. 3 is a block circuit diagram of the terminal device shown above, and Figs. (f) is an operation time chart same as above, and FIG. 5 is a block circuit diagram of a terminal device according to an embodiment of the present invention. ■・
...terminal logic circuit section, C(υ...sensor circuit, @hani...selection circuit, glance...memory circuit, (foundation)...arithmetic circuit, -...comparison circuit, -... ...Setting circuit.

Claims (1)

[Claims] 0+ In a remote monitoring and control device that individually monitors and controls the main operation monitoring panel and multiple terminal devices using time-division multiplexed signals, converts the AnaOI) into digital data and outputs digit data output and scanning output indicating the digit of the data. a selection circuit that determines the digits of the digital value that the main operation monitoring panel requests from the terminal device, determines the digits output from the sensor circuit by scanning output, latches all digital output signals, and outputs them; a memory circuit that stores the output of the device logic circuit section in accordance with the scanning output and outputs the stored data to the arithmetic circuit; and a memory circuit that calculates the output of the memory circuit and the digit data output of the sensor circuit and outputs the output to the comparison circuit. The terminal device is equipped with an arithmetic circuit and a comparison circuit that compares the output of the arithmetic circuit and the output of the setting circuit and outputs an output when the output of the arithmetic circuit is greater than the output of the setting circuit, and digital conversion is performed from the main operation monitoring panel. The data can be read directly, the current value is memorized, the difference with new data is constantly checked, and when the difference has become large, the main operation and monitoring board is notified, and the setting circuit is connected to the main operation and monitoring board. A remote monitoring and control device whose special purpose is to be able to be configured more easily.