JPH0473918B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a plant equipment operating device for controlling and monitoring the operation of plant equipment such as motor-based equipment and heaters connected to a control device.

(Prior Art) Generally, an on-site operation panel is often installed on plant equipment such as pumps and boilers, or on the side of the plant equipment. Each field operation panel is equipped with a changeover switch, a push button switch, a meter, etc., and is installed as an all-weather type, a corrosion-resistant type, etc. depending on the surrounding environment. Each field operation panel is connected to a control device for centralized control.

However, each field operation panel is composed of expensive parts such as instruments, and the periodic replacement of these parts or replacement in the event of failure increases maintenance costs. Moreover, when trying to obtain operating information for each plant equipment at the site, workers must move from one on-site operation panel of the plant equipment located in a large plant factory to another on-site operation panel to collect operating information. do. For this reason, it is a job that requires a large amount of work. In addition, on-site workers report the collected operating information from the on-site operation panel to the control room, and the control room reads the data output from the instruments and computers installed in the control equipment, and reports the operating information collected from the on-site operation panel to the control room. Maintenance work instructions are given to on-site workers by comparing and considering the above. As a result, procedures for stopping plant equipment for maintenance work have become complicated and inefficient.

Therefore, recently, as disclosed in Japanese Patent Application Laid-open No. 60-46696, arbitrary connectors that are connected to the control device by transmission lines and placed near each plant equipment at the site have been developed. An operating device has been proposed that can easily control the operation of each plant equipment from the field by connecting an operating device to the plant equipment.

(Problem to be Solved by the Invention) In the case of this conventional example, the worker connects the portable controller to the connector of the transmission line to transmit signals between the portable controller and the control device. However, before this signal transmission is performed, the operator needs to instruct the control device about the plant equipment to be controlled by using an identification number or the like.

This instruction is given by the operator operating a setting device included in the portable operating device, but sometimes an incorrect identification number may be set. In such a case, the plant equipment with that identification number will be controlled incorrectly, which could damage the plant equipment or even lead directly to a serious accident. It's possible.

In addition, a lot of monitoring data regarding multiple plant equipment is sent from the control equipment side.
The portable controller of the conventional device is provided with a circuit or the like that selects and receives only data related to plant equipment for which an identification number has been set. This increases the space and weight of this portable controller, making it inconvenient to carry.

The present invention has been made in view of the above-mentioned circumstances, and has the following features regarding identification numbers that play an important role in allowing a control device to identify plant equipment to be controlled.
It is an object of the present invention to provide a plant equipment operating device that does not allow incorrect settings and can minimize the space and weight of a portable operating device.

[Structure of the Invention] (Means for Solving the Problems) As a means for solving the above problems, the present invention provides an operation system connected via a transmission line to a control device that centrally controls a plurality of plant equipment. In a plant equipment operating device that has a device and enables individual control of each plant device by operating this operating device near the plant equipment to be controlled, It has a closing contact and an identification setting switch in which an identification number corresponding to each of the plant equipment is set in advance, and each of the switches has a plurality of connection terminal devices installed near each plant equipment and a plurality of When it is removable and attached to any of the connection terminal devices,
a portable controller having a signal transmission circuit connected in parallel to a normally closed contact in the connection terminal device;
When the portable operating device is attached to any of the connecting terminal devices, the normally closed contact in the connecting terminal device is opened, thereby connecting the signal transmission circuit in the portable operating device and the control device. The signal transmission circuits are connected to each other via the transmission path and the normally closed contact in the other connection terminal device, and furthermore, the identification number set by the identification setting switch is It is characterized in that the signal is automatically sent from the signal transmission circuit in the device to the signal transmission circuit in the control device.

(Operation) In the above configuration, the operator goes near the plant equipment that he/she wishes to individually control, and attaches the portable operating device to the connection terminal device installed in the vicinity.

Then, the signal transmission circuit in the portable operation internal unit becomes connected in parallel to the normally closed contact in the connection terminal device, but at the same time, the normally closed contact becomes open. Therefore, the signal transmission circuit in the portable controller is connected to the signal transmission circuit in the control device via the transmission path and a normally closed contact in another connection terminal device provided in the middle of the transmission path.

Then, the signal transmission circuit within the portable operating device transmits the identification number set by the identification setting switch within the connection terminal device to which the portable operating device is attached to the signal transmission circuit within the control device. That is,
When a worker connects a portable controller to a connection terminal device near the plant equipment he or she wishes to control, the identification number of that plant equipment is automatically sent to the control equipment, so it is no longer necessary to control the plant equipment. To,
Accidents such as workers accidentally controlling other plant equipment can be prevented.

In addition, devices that would otherwise take up space and weight, such as identification setting switches, normally closed contacts, and relays that open and close these normally closed contacts, can be housed within the connection terminal device, making the portable controller more compact. It can be made lightweight and convenient to carry.

(Example) Examples of the present invention will be described below based on the drawings. First, FIG. 1 is an embodiment showing the configuration of a plant equipment operating device according to the present invention. Control device 1
is installed in the control room of the plant factory. This control device 1 is internally wired to a power control panel 2 installed in a power room. Control device 1
is wired via a control cable 3 to a pump motor 4 and the like as plant equipment. The power control panel 2 starts or stops the pump motor 4, heater, etc. by being wired to the pump motor 4, heater, etc. via a power cable 2a.
The control device 1 is equipped with various instruments that display voltage, current, pressure, temperature, flow rate, etc., a computer, and the like. From the control device 1, a transmission cable 5 made of stranded wires is arranged near each plant equipment in a plant factory and used for wiring. A connection terminal device 6 is arranged for each plant device group composed of a plurality of plant devices, and each connection terminal device 6 is connected to the transmission cable 5. Each connection terminal device 6 has a socket 7 into which a plug 9 of an operating device 8, which will be described below, is fitted. The surface of the operating device 8 is composed of a keyboard 10 and a liquid crystal display section 11. The keyboard 10 gives instructions to the control device 1, reads out operating information for each plant equipment, and displays it on the liquid crystal display section 11. Further, depending on the content on the liquid crystal display section 11, instructions are given to control the operation of specific plant equipment from the keyboard 10.

Next, the control device 1, the operating device 8, and the connection terminal device 6 will be explained based on FIG. Second
A pump motor 4 as plant equipment is connected to the control device 1 shown in the figure via a control cable 3, and other plant equipment such as motorized valves are also connected. The control device 1 includes a central processing unit CPUA (hereinafter referred to as CPUA) and a storage device.
ROMA (hereinafter referred to as ROMA), storage device
A serial transmitter that performs serial transmission through RAMA (hereinafter referred to as RAMA), digital output device DO, digital input device DI, and connection terminal device 6.
Consists of SIFA. The CPUA reads the processing program and character information stored in the ROMA and performs processing according to the content transmitted from the controller 8 through the serial transmitter SIFA. The contents of the transmission from the serial transmitter SIFA include an inquiry request for operating information representing the operating status of the plant equipment, and a control request for controlling the operation of the plant equipment.
When CPUA receives an inquiry request from serial transmitter SIFA, it temporarily stores the request in RAMA.
CPUA reads inquiry requests from RAMA and processes them according to the CPUA's own processing status. after that,
CPUA is digital input device DI according to inquiry request.
commands to read operating information from the specified plant equipment. When the CPUA receives a control request from the controller 8 through the serial transmitter SIFA, it processes the request in the same way and then outputs the digital output
Instructs the DO to control the operation of plant equipment according to control requests.

The operating device 8 is connected to a connection terminal 6 near where plant equipment is installed. The operating device 8 is a central processing unit CPUB (hereinafter referred to as CPUB) and a storage device.
ROMB (hereinafter referred to as ROMB), storage device RAMB
(hereinafter referred to as RAMB), a serial transmitter SIFB that performs serial transmission, a keyboard control section KEY, and a liquid crystal display section LCD. CPUB is
By reading processing programs and character information stored in the ROMB, it processes operation information inquiry requests and operation control control requests input from the keyboard 10 to the control device 1. The processed inquiry requests and control requests are temporarily stored in RAMB by CPUB. CPUB waits for the transmission status of serial transmitter SIFB and then transmits an inquiry request and a control request to serial transmitter SIFB. Both requests are transmitted to the control device 1 through a connection terminal device 6, which will be described later. At the same time, the operating device 8 displays the content of the request as text information on the screen, and also displays the response information transmitted from the control device 1 on the screen corresponding to the position of the keyboard 10 where the input operation was performed.

FIG. 3 shows details of the keypad 10 and liquid crystal display section 11 of the operating device 8. The keyboard 10 is composed of a function key 12, a numeric key 13, and a selection key 14. Function key 12, PF1, is the field mode key, PE2
is the central mode key and PF6 is the operation command key. In addition, PF3 is a manual key, PF4 is an automatic key, PF5 is a stop key, PF7 is a key for inquiry requests, and PF8 is a key for control requests.
The function of each key is displayed on the liquid crystal display section 11 in correspondence with the position of each key. Of these keys, the field mode key PF1 and the central mode key
It is a pair with PF2, and because it is a pair, it is displayed in a frame. Similarly, the operation command key PF6 and the stop key PF5 are also paired and displayed in frames. In the example shown in FIG. 3, "Site", "Manual" and "Stop" are displayed in reverse video. This is response information from the control device 1 in response to a control request made by a worker to control the operation of specific plant equipment. The highlighted function means that the plant equipment can be "stopped" manually from the "field".

As shown in FIG. 4, the connection terminal device 6 is connected to a transmission cable 5 made of stranded wires from the control device 1 at intervals. On the control device 1 side of the transmission cable 5, both ends of the stranded wire are connected to a signal transmission circuit comprising a photocoupler PC1 and a transistor TR1 in the serial transmitter SIFA. Transmission cable 5 on the connection terminal device 6 side
The stranded wire is disconnected midway through the connection. One of the disconnected ends is connected to one end of the normally closed contact 16 of the relay 15, and the other end is connected to the other end of the normally closed contact 16. Furthermore, in the next connection terminal device 6, the twisted wire is cut midway in the same way. One of the disconnected contacts is connected to one end of the normally closed contact 18 of the relay 17, and the other end is connected to the other end of the normally closed contact 18 to be in series with the normally closed contact 16 of the previous connection terminal device 6. Therefore, each normally closed contact 16, 18 of the relay 15, 17 of each connection terminal device 6, 6 is connected in series to the stranded wire of the transmission cable 5, and is closed by connecting the terminal end of the stranded wire. forming a circuit. Both terminals of each normally closed contact 16, 18 are connected to the socket 7 on the connection terminal device side 6, 6.
This socket 7 is connected to the plug 9 on the operation device 8 side, so the photocoupler PC built in the operation device 8 is connected.
A closed circuit is formed by connecting the transistor TR2 to a signal transmission circuit consisting of the transistor TR2 and the transistor TR2. This photocoupler PC2 and transistor
TR2 is a part of the serial transmitter SIFB,
When the normally closed contact 16 is in an open state, the operating device 8 can transmit data to and from the control device 1. In addition, the connection terminal device 6 includes an identification setting switch 19, each terminal of which is electrically connected to the operating device 8 through a socket 7 and a plug 9. here,
A case in which a worker issues an inquiry request to inquire about operating information of plant equipment, or a case in which a worker issues a control request to perform operational control in accordance with the inquired operating information will be described.

First, an operator connects the plug 9 of the operating device 8 to the socket 7 of the connection terminal device 6. This connection energizes relay 15. Since the normally closed contact 16 of this relay 15 is in an open state, a line connection signal is outputted from the operating device 8 to the control device 1. At the same time, the operating device 8 is connected in series with the control device 1 through the closed circuit of the transmission cable 5. Next, the connection terminal device 6
The unique identification number is transmitted to the control device 1 by the identification setting switch 19. After the control device 1 confirms that the operating device 8 is connected to the specific connection terminal device 6, the control device 1 reads character information indicating completion of connection from the ROMA according to the identification number. Then, the control device 1 receives character information from an operating device 8 connected to it.
to be transmitted. When the operating device 8 receives this character information, it stores it in the RAMB and displays it on the liquid crystal display section 11 at the same time. In this way, the controller 8 can make a request to inquire about operating information of a specific plant device and a control request for controlling the operation of the plant device.

When making an inquiry request for the operation information of a plant device from the controller 8, that is, in this case, taking the pump motor 4 as an example of the plant device, when making an inquiry request for the operation information of the pump motor 4, an inquiry request is made. After pressing the key PF7, the plant equipment number is entered using the selection key 14 and the numeric keys 13.
This plant equipment number is transmitted by CPUB to serial transmitter SIFB. The plant equipment number is transmitted from the serial transmitter SIFB to the control device 1 and at the same time is temporarily stored in the RAMB, and then displayed on the liquid crystal display section 11 by the liquid crystal display control section LCD.

When the CPUA of the control device 1 receives the plant equipment number through the serial transmitter SIFA, this plant equipment number is temporarily stored in the RAMA. after that,
The CPUA instructs the digital input device DI to read the operating information of the plant equipment designated by the plant equipment number. Based on this command, the digital input device DI sequentially reads operating information from the plant equipment. This operating information is temporarily stored in RAMA and then transferred to CPUA. After processing the operating information, CPUA reads the character information of ROMA,
Serial transmitter by editing operating information into character information
Give to SIFA. The operating information edited into character information is sent to the serial transmitter of the controller via the connection terminal device 6.
Transmitted to SIFB.

Operating information is temporarily displayed on the CPUB of controller 8.
After being stored in the RAMB, the operating information is displayed on the liquid crystal display section 11 by the liquid crystal display control section LCD.
This operating information is displayed on the liquid crystal display section 1 as shown in Figure 3.
This is what is displayed at the top of 1.

In addition, when the pump motor 4 is stopped due to a failure or suspension, by making an inquiry request for the operation information of the pump motor 4, the stop key PF5 is pressed.
The corresponding "Stop" display will be highlighted.

Next, when a control request is made to control the operation of the pump motor 4 based on the operation information displayed on the operating device 8, in this case, a control request is made to stop the pump motor 4. be. First, press the control request key PF8, then press the selection key 1.
4 and the numeric key 13 to specify the plant equipment number, the same control path as in the case of the inquiry request described above is followed. The CPUA of the control device 1 determines whether the pump motor 4 can be stopped based on the relationship with other plant equipment. When CPUA of control device 1 determines that it can be stopped, it selects "On-site", "Manual", and "Stop" among the various functions displayed as shown in Figure 3.
to be highlighted. The worker presses the field mode key PF1, manual key PF3, and stop key PF5 in sequence as highlighted. This control request is transmitted to the CPUA of the control device 1 via the serial transmitter SIFB of the controller 8, the connection terminal device 6, and the serial transmitter SIFA of the control device 1. CPUA processes this control request and temporarily stores it in RAMA. after that,
The pump motor 4 is stopped by the CPUA instructing the digital output device DO to output a control request to the pump motor 4. In this way, at a site such as a plant factory, it is possible to inquire about the operating information of plant equipment simply by connecting the operating device 8 to any connection terminal device 6, and
It is possible to control the operation of plant equipment. Furthermore, the functions corresponding to the function keys 12 of the operating device 8 are displayed on the screen, and the functions of the keyboard 10 to be operated are displayed in reverse video, making the operation easy. .

〔Effect of the invention〕

As described above, according to the present invention, when a portable controller is connected to a connection terminal device installed near a plant device that is subject to individual control, the identification number of the plant device is automatically transmitted to the control device. Since the information is sent, it is possible to prevent an operator from mistakenly specifying the plant equipment to be controlled.

Further, since devices such as an identification setting switch, a normally closed contact, and a relay can be housed within the connection terminal device, the portable operating device can be made small, lightweight, and convenient to carry.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the arrangement of an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the control device and the control circuit of the portable operating device in FIG. 1, and FIG. 3 is the portable operating device in FIG. 1. FIG. 4 is a circuit diagram showing a signal transmission route between the control device, the connection terminal device, and the portable operating device in FIG. 1. FIG. 1... Control device, 4... Plant equipment (pump motor), 5... Transmission line (transmission cable), 6
... Connection terminal device, 8 ... Portable operation device, 16,1
8... Normally closed contact, 19... Identification setting switch,
PC ₁ , TR ₁ ... Control device side signal transmission circuit (photocoupler, transistor), PC ₂ , TR ₂ ... Portable operation device side signal transmission circuit (photocoupler, transistor).

Claims (1)

[Claims] 1. A control device that centrally controls a plurality of plant devices has an operating device connected via a transmission line, and the operating device is placed near the plant device to be controlled. A plant equipment operating device that enables individual control of each plant equipment by operating it, includes a normally closed contact provided in the middle of the transmission path, and an identification number in which an identification number corresponding to each of the plant equipment is set in advance. It has a setting switch, each of which can be attached to or removed from a plurality of connection terminal devices installed near each plant equipment, and can be attached to or removed from any of the plurality of connection terminal devices. a portable operating device having a signal transmission circuit that is connected in parallel to a normally closed contact in the connecting terminal device when the portable operating device connects to any of the connecting terminal devices; When bonded, the normally closed contacts in the connection terminal device are opened, thereby connecting the signal transmission circuit in the portable controller and the signal transmission circuit in the control device to the transmission line and the other connection terminal device. They are connected to each other via normally closed contacts, and furthermore, the identification number set by the identification setting switch is automatically transferred from the signal transmission circuit in the portable controller to the signal transmission circuit in the control device. A plant equipment operating device characterized in that the plant equipment is configured to be sent to