JPH0634546B2 - Remote monitoring control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention connects a central control unit and a terminal unit with a pair of signal lines, and remotely controls a load by time-division multiplexing transmission of monitoring and control data. Remote monitoring control system.

[Prior Art] Conventionally, a remote monitoring control system of this type includes a central control device, a monitoring terminal device for monitoring the state of an individual operation switch or a pattern control switch, and a control terminal device for controlling a load. The central control unit accesses each terminal unit to monitor and control data between the central control unit and each terminal unit by time-division multiplexing, and group operation switches or loads. The central control unit was provided with a storage means for storing data and pattern control data for a plurality of loads.

[Problems to be Solved by the Invention] In the above-described conventional example, when setting data such as grouping data and pattern control data, group / pattern setting including an individual selection switch and a pattern setting switch is provided. Although various data settings have been performed using the terminal for data processing, there is a problem that the setting operation of the data is troublesome and the setting data cannot be easily confirmed, so that a data setting error is likely to occur.

The present invention has been made in view of the above points, and it is an object of the present invention to perform remote monitoring control in which data setting such as grouping data and pattern control data can be easily performed and a data setting error is unlikely to occur. To provide a system.

[Means for Solving the Problems] The present invention achieves the above object, and includes a central control device,
Centralized control by connecting each terminal unit from the central control unit by connecting a monitoring terminal unit that monitors the status of the individual operation switch or pattern control switch and a control terminal unit that controls the load with a pair of signal lines. A central control unit is provided with a storage means for storing monitoring switch and load grouping data and a plurality of load pattern control data for time-division multiplex transmission between the device and each terminal. In the remote monitoring and control system, the interface control device for time-division multiplex transmission of data transmission between an external control device such as a host computer and a central control device is provided through a signal line, and a display provided in the external control device. Load operating state, pattern control data,
The grouped data etc. are displayed appropriately, the data is set using the keyboard of the external control device, and the set data is transmitted to the central control device via the interface terminal unit and written in the storage means. It was done.

[Operation] The present invention is configured as described above, and is provided with an interface terminal device for time-division multiplexing transmission of data transmission between an external control device such as a host computer and a central control device via a signal line, The display provided in the external control device displays the operating status of the load, pattern control data, grouping data, etc. as appropriate, and the data is set using the keyboard of the external control device.
Since the set data is transmitted to the central control unit via the interface terminal unit and written in the storage means, data setting such as grouping data and pattern control data can be easily made while observing the display. Since the data setting can be performed while confirming the setting data, the setting error is less likely to occur.

[Embodiment] FIG. 1 is a diagram showing an example of a schematic configuration of a remote monitoring and controlling system according to the present invention, in which a central control device 1, a plurality of monitoring terminals 2 and control terminals having unique addresses are set. The transmission signal Vs sent from the central control device 1 to the signal line 4 is connected to the container 3 by a pair of signal lines 4, and the transmission signal Vs shown in FIG.
As shown in (a), a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating the signal mode, an address data signal AD for calling the terminals 2 and 3, a load L.
_{1 to} L ₄ is a multi-pole (± 24 V) time division multiplex signal composed of a control data signal CD for controlling _{1 to} L ₄ , a checksum data signal CS, and a return standby signal WT for setting a return period from the terminals 2 and 3, Data is transmitted by pulse width modulation. In each of the terminals 2 and 3, when the address data of the transmission signal Vs received via the signal line 4 and its own unique address data match, the control data of the transmission signal Vs is taken in and the transmission signal Vs is received.
In synchronism with the return standby signal WT of s, the monitor data signal is sent back as a current mode signal (a signal sent by short-circuiting the signal lines 4 via an appropriate low impedance).

Further, to the central control unit 1, a dummy signal transmitting means for constantly transmitting the dummy transmission signal Vs in which the mode data signal MD is set to the dummy mode, and any one of the monitoring terminals 2 shown in FIG. When the interrupt signal Vi as shown in (1) is received, the interrupt processing means for detecting the interrupt generating terminal device 2, accessing the terminal device 2 and returning the monitoring data is provided. On the other hand, in the monitoring terminal device 2,
When there is a monitoring input by operating the switches S _{1 to} S _4, the interrupt signal Vi is generated in synchronization with the start pulse signal ST of the dummy transmission signal Vs, and
Transmission signal V from the central control unit 1 in the address confirmation mode
An interrupt generating means for returning its own unique address data in synchronism with the return standby signal WT of s, and a monitoring input when the central control unit 1 transmits an interrupt access mode transmission signal Vs in response to the interrupt. Data return means for returning the monitoring data are provided. In the central control device 1, the control terminal device 3 is based on the monitoring data returned from the monitoring terminal device 2 to the central control device 1.
The control data to be transmitted to the control terminal 3 is transmitted to the control terminal device 3 and the loads L _{1 to} L ₄ are controlled. Reference numeral 5 in the figure is a latching relay for load control.

FIG. 3 shows a circuit configuration of the control terminal device 3. The control terminal device 3 transmits the transmission signal V transmitted via the signal line 4.
a power supply circuit 10 which forms a circuit power supply from s, and a transmission signal V
A signal processing circuit 11 that receives s, performs signal processing, forms a return signal V _B and transmits the signal, an address setting unit 12 that sets a unique address, and a single load A circuit number setting unit 13 that sets which circuit of the control circuits (corresponding to 4 control data bits) controls the load, a drive circuit 14 that drives a load control relay circuit 15, and an operation. The signal processing circuit 11 detects the match between the address data of the transmission signal Vs and the unique address, and when the address match is detected, the control data is fetched and the circuit number setting unit 13 is formed. Based on the load monitoring input input via the monitoring circuit 16 while forming the control output based on the bit selected in to drive the output relay 15 The monitor data for return is formed and returned to the central controller 1 by the return signal V _B in the current mode. The control terminal 3 may not be provided with the circuit number setting unit 13, but the relay circuit 15 may be formed so as to control the load by each bit of the control data, and four control circuits may be formed. Needless to say.

FIG. 4 shows a monitoring terminal 2 for monitoring the state of an individual operation switch or a pattern control switch, and the circuit configuration is substantially the same as that of the control terminal 3 described above. The state of the switch S ₁ is monitored at, the monitoring data is formed by the signal processing circuit 11 based on the switch monitoring input, and the monitoring data is returned to the central control unit 1 by the interrupt processing described above. In addition, the unique address can be set by the DIP switch of the address setting unit 12 such that the lower 6 bits of the 8-bit address data can be appropriately set by the user and the upper 2 bits can be set by the maker. For monitoring and control) setting, both terminals 2 and 3 can be easily corresponded by setting the user setting part of the unique address of the monitoring and control terminals 2 and 3 to the same value. , The load L connected to the control terminal 3 based on the monitoring data of the switch S ₁ returned from the monitoring terminal 2 set to the same value
₁ can be controlled. If the monitoring terminal 2 monitors the switch states of the plurality of switches S ₁ , S _2, ..., The circuit number setting unit 13 is not necessary, and the monitoring circuit 16 includes a plurality of switches S 1. ₁ , S ₂ ...
You just need to enter the switch status.

FIG. 5 and FIG. 6 show an embodiment of the interface terminal device 8 for time-division multiplexing transmission of data between the external control device 9 such as a host computer and the central control device 1. , A transmission signal transmission / reception unit 80 for transmitting / receiving a time division multiplex transmission signal transmitted via the signal line 4.
An insulating section 81a, 81b formed of photocouplers for transmitting signals in an electrically insulated state, a central control section 82 for signal processing and determination, and a data storage section 83 for storing the operating state of the remote monitoring control system. And the central control unit 82
Is formed by a watchdog timer 84 for resetting the CPU at the time of runaway and data input / output units 85a and 85b. Bit serial data is input / output via the data input / output unit 85a and via the data input / output unit 85b. Bit parallel data is input and output. In the embodiment, bit serial data (RS2 in the embodiment) input / output through the data input / output unit 85a is input.
32C standard) baud rate, stop bit and other transmission conditions can be changed freely, and transmission error prevention means for performing parity check of data input via the data input / output units 85a and 85b are central control unit 82. It is provided in. The transmission conditions are set by setting the baud rate switches Sb _{1 to} Sb ₈ , the stop bit setting switch Ss, and the parity setting switch Sp ₁ ,.
And sp _2, performed by the setting switch unit 86 more the switch Sw for the word length set, the switch states of the switches _Sb 1 to SB ₈ via the encoder EC central control unit 82 to freely set the baud rate to 8 stages It is designed to be taken into.

Now, by connecting the computer main body 89 of the external control device 9 and the data input / output unit 85a or 85b of the interface terminal device 8 via the interface 88 and the transmission line 87, the external control device 9 and the interface terminal device 8 are connected. Data is exchanged between the two. Further, the external control device 9 includes a liquid crystal display or C
A display 9a such as an RT display and a keyboard 9b are provided so that data can be easily set. Here, in the interface terminal device, the transmission signal Vs transmitted via the signal line 4 is received by the transmission signal receiving unit 80, and the central control unit 82
The data sent by the transmission signal Vs is constantly monitored to determine the operating state of the load, the pattern control state, etc., and the load control state data is stored in the data storage section 83. Next, when a state confirmation command for confirming the operation state of the remote monitoring control system is sent from the external control device 9, the interface controller 8 sends a command to the central control unit 82. The data is decoded and the status data such as the load control status and the pattern control status stored in the data storage unit 83 is returned to the external control device 9. On the other hand, when a load control command for individually controlling or pattern controlling the load of the remote monitoring control system is transmitted from the external control device 9, the central control unit 82 of the interface terminal device 8 decodes this command to perform remote monitoring control. The same operation as the system monitoring terminal 2 is performed, and a return signal for returning the same monitoring data as when the individual operation switch or the pattern control switch is pressed is sent from the transmission signal transmitting / receiving unit 80 to the signal line 4. To be done. That is, in the interface terminal device 8, the unique address is set by the control command, and the switch state monitoring data is set,
Since the operation is similar to that of the monitoring terminal device 2, when a monitored switch in the remote monitoring control system is pressed in response to a pseudo switch operation performed on the external control device 9 side, The same load control operation will be performed. Therefore, the interface terminal unit 8 causes the remote monitoring control system to operate in conjunction with the external control device 9 or a local control operation for controlling a plurality of systems using the external control device 9 as a host control system, a timer operation,
The pattern operation can be easily performed, and the control operation can be arbitrarily upgraded. Furthermore, when it is confirmed that the operating state of the load is changed by the interface terminal device 8, if the interface terminal device 8 interrupts the external control device 9 to transmit the load change data, the external control device 9 This means that the load operating status can be constantly monitored on the side.

On the other hand, since the input / output data of the interface terminal device 8 may be either bit serial data or bit parallel data, the data exchange with the external control device 9 can be easily performed without using a conversion interface. In the embodiment, the baud rate (75 baud, 150 baud, 300 baud, 600 baud, 1200 baud, 2400 baud, 480) when inputting and outputting bit serial data (RS232C standard, transmission code ASCII) is used.
0 baud, 9600 baud, stop bit (1 bit,
2 bits) Parity (none, even, odd), word length (8 bits,
7 bits) and other transmission conditions such as switches Sb ₁ to Sb ₈ ,
Since Sp _{1, Sp} 2, condition setting means for freely changed in Sw are provided, the switch _Sb 1 _~Sb 8, S
Various bit serial data inputs / outputs can be supported by setting conditions by s, Sp ₁ , Sp ₂ , Sw, and a baud rate setting switch Sb can be set.
By turning off all of _{1 to} Sb ₈ , the switch Sb
So that the switching to the data processing bit parallel data of data processing of the central control unit 82 by diverting a ₁ to SB _8.

7 and 8 show examples of data setting screens displayed on the display 9a of the external control device 9,
First, on the pattern data setting screen, as shown in FIG. 7, grouping data such as load selection status, load operation status, pattern switch selection status, and pattern control data setting status can be seen at a glance. The keyboard 9b is displayed for changing the setting screen and setting or changing data.
It can be easily done by using the function keys, cursor keys, and space key (or return key).
In the setting screen, ◯ indicates on, * indicates off, and blank indicates non-setting. The setting screen of FIG. 8 is a setting method selection screen for selecting whether to set a part or all of the pattern control data.

As described above, in the present invention, the grouped data,
Data settings such as pattern control data are displayed 9
Since it can be easily performed by using the keyboard 9b while looking at a, and the data setting can be performed while confirming the setting data, a setting error is less likely to occur.

It should be noted that if the portable external control device 9 having the interface terminal 8 and the data storage means is integrated into a data setting device and can be separated from the signal line 4 freely, it is possible to use it in a place other than the site (for example, in an office). It is possible to set pattern control data, grouping data, etc. in advance on the desk), bring a data setting device to the site at the time of construction, connect it to the signal line 4, and transmit the set data to the central control device 1. Writing to the storage means makes data setting easier. FIG. 9 is a flow chart showing the setting operation.

[Advantages of the Invention] The present invention is configured as described above, and provides an interface terminal device for time-division multiplexing transmission of data transmission between an external control device such as a host computer and a central control device via a signal line. Provided, the operating condition of the load, pattern control data, grouping data, etc. are appropriately displayed on the display provided in the external control device, and the data is set using the keyboard of the external control device.
Since the set data is transmitted to the central control unit via the interface terminal unit and written in the storage means, data setting such as grouping data and pattern control data can be easily made while observing the display. Since the data setting can be performed while checking the setting data, there is an effect that a setting error is less likely to occur.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the same as above, FIGS. 3 to 5 are block circuit diagrams of main parts of the same, and FIG. 6 is a schematic structure of main parts of the same. Figures, Figures 7-9
The figure is a diagram for explaining the operation of the above. Reference numeral 1 is a central control device, 2 is a monitoring terminal device, 3 is a control terminal device, 4 is a signal line, 8 is an interface terminal device, 9 is an external control device, 9a is a display, and 9b is a keyboard.

Claims (1)

[Claims] 1. A central control unit comprising a central control unit, a monitoring terminal unit for monitoring the state of an individual operation switch or a pattern control switch, and a control terminal unit for controlling a load connected by a pair of signal lines. Access each terminal to monitor and control data between the central control unit and each terminal by time-division multiplex transmission, and store operation switch or load grouping data and pattern control data for multiple loads. In a remote monitoring control system in which a storage means for controlling the central control unit is provided, an interface terminal device for time-division multiplexing transmission of data transmission between an external control unit such as a host computer and the central control unit via a signal line is provided. If the display provided on the external control device displays the operating status of the load, pattern control data, grouping data, etc. In addition, the remote control is characterized in that the data is set by using the keyboard of the external control device, and the set data is transmitted to the central control device through the interface terminal unit and written in the storage means. Supervisory control system.