JP2001337715A - Plant operation monitoring computer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plant operation monitoring computer system to stably renew a operation monitoring computer system from an existing operation monitoring computer system and to possibly shorten renewal work period. SOLUTION: In characteristics of the invention, one of the controllers 10 being at stop among a plurality of controllers 10 is connected to one side of the duplicated new communication control devices 4 and puts itself under the control of the new operation monitoring computer 1. The controller 10 makes test-operation to drive plant equipment 12 and transmits plant data to the new operation monitoring computer 1. The controller 10 is also connected to one side of the existing communication control devices 9 after test-operation and puts itself under the control of the existing operation monitoring computer 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant operation monitoring computer system for taking plant data from a plurality of controllers for controlling plant equipment into an operation monitoring computer and monitoring plant operation.

[0002]

2. Description of the Related Art Generally, operation monitoring of a large-scale plant such as a power supply plant or a city gas production plant is performed by a computer system. The plant operation monitoring computer system is used to control production performance, operate plant equipment, control the number of multiple plant equipment, etc., and operate man-machines with multiple operator consoles based on the plant status displayed on the display screen. Performs operation monitoring.

[0003] Plant data is transmitted to a plant operation monitoring computer from a controller that controls plant equipment. There are many plant devices, and the number of controllers for controlling the plant devices is on the order of 100 units. The plant operation monitoring computer and the controller are connected via a network. However, since the number of controllers is large, several tens of units are connected as a single group by a dedicated network.

[0004] A communication control device such as a gateway processor is provided for each network divided into groups of several tens, but the communication control device is made a dual system from the viewpoint of improving reliability. The two communication control devices are used by switching between a master system and a slave system. The communication control device is also called a data relay computer.

[0005] By the way, a plant operation monitoring computer system including an operation monitoring computer, a network, and a communication control device needs to update the computer system when a predetermined period elapses after operation. Updating of the computer system is required to be performed without stopping the plant from the point of publicity such as a power supply plant and a city gas production plant. That is, it is required that the existing computer system be updated to the new computer system without stopping.

Conventionally, such a plant operation monitoring computer system is updated by starting up a new computer system while the plant is being monitored by the existing computer system, and then sequentially installing the controllers one by one. The system is switched from a computer system to a new computer system.

More specifically, after stopping a plant device controlled by a certain controller, the corresponding controller is stopped, the operation of the new computer system is checked, and then the plant device targeted by the controller is changed to a new computer system. To monitor the operation. If such an update operation is to be performed for all of the 100 or more controllers, the construction period is actually about two to three years.

In order to solve this problem, it is conceivable to bring the new computer system into an operating state and connect all controllers to the new computer system collectively. However, plant operation was temporarily suspended, and the plant operation was not possible due to the remarkable difference in the performance and functions of the existing computer system and the new computer system, as well as the technical level of the network, and the unforeseen failure of data transfer during connection. The danger of becoming

Updating of the plant operation monitoring computer system is described in, for example, Japanese Patent Application Laid-Open No. 10-307605.

[0010]

In the prior art, it takes about two to three years to update a computer system. During the update period, some of the updated plant equipment is replaced with a new computer. The operation monitoring is performed by the system, and the operation of the plant equipment before the update is monitored by the existing computer system. For this reason, there are the following problems.

[0011] Even though the plant is the same plant, the plant status is processed and displayed by the two operation monitoring computers, the existing and the new, so that the operator always has the plant equipment under the control of the existing or the new computer system. Operational monitoring must be performed while grasping whether there is any traffic. In addition, forms are output from two computer systems, an existing one and a new one, and the management range is sequentially shifted by a change in the computer system in which the controller is under control management, so that the management of the forms becomes complicated.

In addition, since the overall control of the plant equipment is divided into two computers, an existing computer and a new computer, the overall control of the plant equipment cannot be performed during the renewal work. This is a major problem, for example, in city gas production plants. In a city gas production plant, the demand for gas changes gradually in the morning, afternoon, and evening, and it is necessary to operate and stop a plurality of gas vaporization facilities provided in accordance with the demand. A plurality of controllers are provided corresponding to each of the plurality of gas vaporization facilities. The operation and stop of these controllers are performed by the operation monitoring computer system, and the gas supply becomes extremely unstable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a plant operation system capable of stably updating an existing operation monitoring computer system to a new operation monitoring computer system and shortening the update work period. It is to provide a monitoring computer system.

[0014]

A feature of the present invention resides in that a newly-installed operation monitoring computer is provided with a duplicated newly-installed communication control device connected via a newly-installed network, and the plurality of controllers are stopped to operate. One controller is connected to one of the new communication control devices, placed under the control of the new operation monitoring computer, performs a test operation to drive plant equipment with the controller, and transmits plant data to the new operation monitoring computer. The controller is connected to one of the existing communication control devices after the end of the test operation and is under the control of the existing operation monitoring computer.

According to the present invention, except for one controller under the control of the new operation monitoring computer, the controller is operated under the control of the existing operation monitoring computer, and one controller under the control of the new operation monitoring computer is operated for test operation. The new operation monitoring computer will be able to check the plant status. Therefore, it is possible to confirm whether or not the operation of the controller that has been test-run can be monitored by the new operation monitoring computer system, and it is possible to safely perform the batch switching to the new operation monitoring computer system after all the test operations are completed, thereby shortening the update work period.

In addition, since the controller performs the test operation while being connected to one of the existing communication control devices, even if the operation monitoring by the new operation monitoring computer system is defective, the controller easily returns to the control management of the existing operation monitoring computer system. Therefore, it is possible to perform the update with high security.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which one controller is switched to a new operation monitoring computer system according to the present invention and a trial operation is being performed. FIG. 2 is a system configuration diagram in which the configuration of the operation monitoring computer system in FIG. 1 is simplified. It is.

First, operation monitoring by the existing operation monitoring computer system will be described with reference to FIG. 3 to facilitate understanding of the present invention.

FIG. 3 shows only the existing plant control operation monitoring computer system out of the computer system shown in FIG.

In FIG. 3, the existing operation monitoring computer system includes an operation monitoring computer 6, a network 3, duplicated communication control devices (data relay computers) 9a and 9b, and controllers 10a, 10b and 10c.
Although there are several tens of controllers 10, only three are shown to simplify the illustration.

The controllers 10a, 10b, 10c
It is connected (subordinate connection) to two communication control devices 9a and 9b duplexed by two transmission lines 13a and 13b. The controllers 10a, 10b, and 10c are connected to the plant devices 12a, 12b, and 12c via the process input / output devices 11a, 11b, and 11c, respectively.
It controls each plant equipment 12a, 12b, 12c.

The data (plant data) of the plant equipment 12a, 12b, 12c is stored in the process input / output device 11a,
Controllers 10a, 10b, 11b, 11c,
10c. Controllers 10a, 10b, 1
0c is the transmission data of transmission lines 13a, 1
3b, the data is relayed by the communication control devices 9a and 9b, and then transmitted to the existing operation monitoring computer 6 via the network 3.

An operator's operation command (for example, a number control operation command and a stop command) from the existing operation monitoring computer 6 is transmitted to the controllers 10a, 10b, and 10c via the network 3 and the communication controllers 9a and 9b. . The controllers 10a, 10b, and 10c perform sequence control of the corresponding plant devices 12a, 12b, and 12c based on the operation command.

The communication control devices 9a and 9b are of a duplex configuration, and when a failure occurs in the communication control device 9a which is the main system in the figure, the switching is automatically performed. The communication control device 9b, which has been described above, becomes the main system and continues the data relay process.

The controllers 10a, 10b and 10c are provided with a line switching device 14 for switching the transmission lines 13a and 13b.
a, 14b and 14c. Line switching device 14
The switches a, 14b, and 14c can be switched to the a side or the b side by a switching command by a man-machine operation from the operation monitoring computer 6 by the operator or a switching command by processing of the communication control devices 9a and 9b. In FIG. 3, the existing communication control device (1) 9a is a main system, and the existing communication control device (2) 9
b is a slave, and the controllers 10a, 10b, 10c
Line switching devices 14a, 14b, 14c
The circuit is closed on the a side so that the communication at a is effective.

To update such an existing operation monitoring computer system to a new operation monitoring computer system, first, a new operation monitoring computer 1, a network 2, and a dual-system new communication control device (1) shown in FIG. A new operation monitoring computer system including a communication communication device 4a and a new communication control device (2) 4b is installed. The new communication control devices 4a, 4b are provided with connection devices (input / output devices) 5a, 5b for performing data transmission with the existing controllers 10a, 10b, 10c.

From this state, the controllers 10a, 10a
A trial operation of the controllers 10a, 10b, and 10c performed before the controllers 10a and 10b are collectively connected to the new operation monitoring computer system will be described.

The controllers 10a, 10b, and 10c are provided corresponding to the plant equipments 12a, 12b, and 12c. The plant equipments 12a, 12b, and 12c are usually provided with a plurality of the same equipments to control the number of the equipments. The plant equipment is stopped so that the operation of the whole plant is not affected.

FIG. 1 shows a state in which the line switching device 14a of the controller 10a is closed to the side b and only the controller 10a is under the control management of the new operation monitoring computer 1.

The procedure for changing the state of FIG. 3 to the state of FIG. 1 will be described with reference to the flowchart shown in FIG.

First, in step S1, of the duplex configuration of the existing communication controllers 9a and 9b and the new communication controllers 4a and 4b, the communication controllers 9a and 4a are used as the main system and the communication controllers 9b and 4b are used as the sub-systems. State. In step S2,
The existing communication control device 9b is stopped, the transmission line 13b is disconnected, and the transmission line 13b is connected to the connection device 5 of the new communication control device 4b.
b.

The process shifts from step S2 to step S3, where the line switching device 14a of the controller 10a is set to the neutral position and disconnected from the transmission line 13a in accordance with the disconnection command from the existing main communication control device 9a. In step S4, the main and sub systems of the new communication controllers 4a and 4b are switched, and the new communication controller 4b is shifted from the sub system to the main system (master). The controller 10a is connected to the new communication control device 4b, and data transmission and reception via the transmission line 13b is started. FIG. 2 shows this state in a simplified manner for easy understanding.

FIG. 5 is a functional block diagram of software in the new communication control device 4b. New communication control device 4
a has the same configuration.

The software of the new communication control device 4 is grouped as one unit for one controller 10 unit.
This grouping is executed sequentially. One group is composed of four components. The four components are plant databases 20a, 20b, and 20c that store plant data transmitted from the controller 10 for transfer to the new operation monitoring computer 1, and the controller 10 is connected to the new communication control device 4. The existing controller transmission processing units 22a, 22b, and 22c having a function of collecting data from the controller 10 and performing data setting when the existing controller 10 is installed. A transmission processing unit for a new controller 23a, 23b, 23c having a function of collecting data and setting data from a newly installed controller (not shown);
It is composed of connection management processing units 21a, 21b, 21c for managing the existing / new establishment of the controller and the connection state.

FIG. 6 shows the connection management processing unit 21 shown in FIG.
2 shows the configuration of a controller connection management table used by a, 21b, and 21c for storing information.

The controller connection management table stores two pieces of information of "new / old mode" and "connection mode" for each controller. The new / old mode stores whether the connected controller is “existing” or “new”. Further, when the controller is not set as a processing target of the communication control device 4, or a state of "no connection" is stored for a future expansion controller. The connection mode manages whether the transmission line 13 is actually connected and data can be transmitted from the controller in a “connected” or “not connected” mode.

FIG. 7 is a flowchart for explaining the operation of the connection management processing section 21. The controller connection management table of the connection management processing unit 21 assumes that only the controller (1) 10a is in the new / old mode: existing connection, and the connection mode is connection, as shown in FIG.

The processing in FIG. 7 of the connection management processing section 21 is executed when the communication control device 4 switches from the slave system to the master system.

In step S11, the new / old mode (type) of the connected controller is determined from the controller connection management table, and the controller 10a is already installed, and the process proceeds to step S12 to determine the connection mode. The controller 10a is in a connected state, and executes a transmission process with the controller 10a in step S15. If there is no connection in step S11, the process proceeds to step S14, and the process ends without any processing. If it is determined in step S12 that there is no connection, the process shifts to step S16 and ends without any processing.

On the other hand, if the new controller is connected in step S11, the process proceeds to steps S13 and S17 to execute the transmission process with the new controller.

As described above, only the existing controller 10a is connected to the new operation monitoring computer 1 by the communication control device 4b, and only the controller 10a is put under the control management of the new operation monitoring computer 1, and the test operation is performed.

In this state, the existing controllers 10b and 10c operate as shown in FIG.
It is connected to the existing operation monitoring computer 6 via a, and is in a state where normal data transfer is possible. That is, the controllers 10b and 10c are under the control of the existing operation monitoring computer 6. Therefore, the test operation of the controller 10a can be performed without affecting the online operation of the other plant devices 12b and 12c.

The test operation of the controller 10a is performed while viewing the display screen of a display device (not shown) provided for the man-machine in the newly-installed operation monitoring computer 1.

When the operator gives a test operation command from the new operation monitoring computer 1, the controller 10a controls the sequence of the plant equipment 12a in a predetermined pattern. For example, FIG. 8 shows a plant system diagram in which the raw material solution in the raw material tank 30 is fed to the mixing tank 35. The controller 10a starts the pump 31 and measures the flow rate with the flow meter 33, and the control valve It is assumed that the opening of the nozzle 32 is adjusted to control the flow rate to a constant value.

When the plant data from the trial operation of the controller 10a is correctly transmitted to the operation monitoring computer 1, for example, the pump 31 and the control valve 32 are highlighted by color change or the like as shown in FIG. ,
“XXX.X” is displayed as the flow rate.

On the other hand, when the plant data is not correctly transmitted from the controller 10a, the pump 31 and the control valve are displayed in white, and the flow rate is displayed as "000.0", as shown in FIG. 8B.

The operator judges the plant state by the trial operation of the controller 10a from the display screen of the display device, and judges that the new operation monitoring computer system for the controller 10a is operating normally.

Here, the trial operation of the controller under the control of the new operation monitoring computer system is performed by driving the actual plant equipment, but other plants controlled by the controller under the control of the existing operation monitoring computer system are used. Since the equipment operates normally, the operation can be performed without affecting the plant operation.

After the test operation of the controller 10a is completed, a disconnection command is issued from the new main communication control device 4b to bring the line switching device 14a to the neutral position, and then a connection command is issued from the existing main communication control device 9a to transmit the transmission line 13a. And the controller 10a is returned to the control management of the existing operation monitoring computer 6.

During the period in which the test operation of the controller 10a was being performed, the existing operation monitoring computer 6 has the controller 10a.
Is not transmitted, but the controller 10a is in a stop period due to the control of the number of units, and the operation is performed on the assumption that the controller 10a is not involved in the operation.
It does not affect the operation of the whole plant equipment. Also,
The existing operation monitoring computer 6 monitors the plant data transmitted from the other controllers 10b and 10c under control management, and there is no particular effect even if there is no plant data during the test operation period of the controller 10a.

As a result of the test operation of the controller 10a, FIG.
When a failure is detected as in (b), the controller 10a performs the recovery in the same procedure as the above-described procedure of returning to the control management by the existing operation monitoring computer system of the controller 10a after the completion of the test operation. Perform the correction work on the newly installed operation monitoring computer system. After the correction work of the new operation monitoring computer system is completed, the controller 10a is again put under the control management of the new operation monitoring computer system, the faulty portion of the new operation monitoring computer system is checked, and the test operation is completed. Similarly, the other controllers 10b and 10c are connected to each other, and the test operation is performed.

When the test operation of all the controllers is completed, the transmission line 13b connected to the newly established main communication controller 4b
Is connected to the existing slave communication control device 9b to bring it to the state shown in FIG. This completes the test operation of the controllers 10b and 10c via the new communication control device 4b.

Next, the connection between the existing communication control device 9a and the new communication control device 4b shown in FIG. 1 is reversed by switching the main system / slave system of the existing communication control devices 9a and 9b, as shown in FIG. The existing communication control device 9b is connected to the new communication control device 4a, and the same test operation as before is performed by three controllers 10a.
a, 10b, and 10c, and completes the test run via the new communication control device (1) 4a.

Next, a description will be given of the case where the trial operation of all the controllers is completed and the controller is switched to the newly installed operation monitoring computer system at a time.

After the existing operation monitoring computer system is returned to the state shown in FIG. 3, the transmission line 1 is transmitted in the same procedure as described above.
3b is connected to the connection device 5b to obtain the configuration shown in FIG. In the controller connection management table shown in FIG. 6, the new and old modes are set to "existing connection" and the connection mode is set to "connection" for all controllers in advance. And FIG.
The switching operation is performed according to the flowchart shown in FIG. In addition,
In this switching work, it is necessary to issue a disconnection command to the line switching devices 14a, 14b, 14c of all the controllers 10a, 10b, 10c connected in step S3. Then, by switching between the main system and the sub system of the new communication control device in step S4, all the controllers 10a, 10b, and 10c are collectively connected to the new operation monitoring computer system as shown in FIG.

In this state, the functions of the entire system, which could not be performed in the individual test, and the test operation of the plant equipment are performed. As is apparent from FIG. 11, in this state, the slave transmission line 13a is connected to the existing master communication control device 9a. In the event that a failure or failure occurs during the function check in the new operating terminal monitoring computer system and the trial operation of the plant equipment, the line switching device 14a of all controllers 10a, 10b, and 10c is sent from the new main communication control device 4b. , 14b, and 14c, the line switching devices 14a, 14b, and 14c are set in the neutral state, and then the line switching devices 14a, 14b, and 10c of all the controllers 10a, 10b, and 10c are sent from the existing main communication control device 9a.
A connection command is issued to the controllers a, b, and c to connect all the controllers 10a, 10b, and 10c to the transmission line 13a. This makes it possible to easily return to the control management of the existing operation monitoring computer system in a lump,
Driving obstacles can be minimized, and a safe update can be performed.

If the test operation in the new operation monitoring computer system is good, the existing main communication control device 9a shown in FIG.
Is disconnected, and the transmission line 13a is connected to the connection device 5a of the newly installed slave communication control device 4a. Finally, the main system / slave system is switched between the new communication control devices 4a and 4b, and FIG.
The configuration shown in FIG.

In this state, the functions of the entire system are checked via the newly installed communication control device 4a, and the trial operation of the plant equipment is performed. In this state, since the slave transmission line 13b is connected to the new slave communication controller 4b that has already been tested, it is necessary to check the function of the new operation monitoring computer system via the new slave controller 4a. If a failure or failure occurs during the trial operation of the plant equipment, the new communication control device 4
The main system / slave system is switched between a and 4b to connect all the controllers 10a, 10b and 10c to the transmission line 13b.
As a result, the system can be easily returned to the test-operated system in a lump, and operational obstacles can be minimized.

As described above, the batch switching of the controller to the new operation monitoring computer system is completed.

When changing an existing controller under the control of the new operation monitoring computer system to a new new controller in this way, the existing controllers are stopped one by one and updated to the new controller. The new communication control devices 4a and 4b incorporate data transmission software for the newly installed controller.
By changing the new / old mode of the controller connection management table shown in FIG. 7 to “new connection”, a new controller data transmission process is executed in accordance with the connection management process shown in FIG.
It is very easy to transfer to a new controller. In this way, all existing controllers are finally updated to new ones.

As described above, the operation monitoring computer system in which a plurality of controllers are under control management is updated to a new one. However, except for one controller under the control management of the new operation monitoring computer, the existing operation monitoring computer system is updated. It is operated under the control of a computer, and one controller under the control of the new operation monitoring computer is trial-operated so that the new operation monitoring computer can check the plant status. Therefore, it is possible to confirm whether or not the operation of the controller that has been test-run can be monitored by the new operation monitoring computer system, and it is possible to safely perform the batch switching to the new operation monitoring computer system after all the test operations are completed, thereby shortening the update work period.

Further, since the controller performs the test operation while being connected to one of the existing communication control devices, even if the operation monitoring by the new operation monitoring computer system is defective, the controller easily returns to the control management of the existing operation monitoring computer system. Therefore, it is possible to perform the update with high security.

In the above embodiment, for convenience of explanation, one communication control device and three controllers have been described as an example. However, in an actual system, there are a plurality of duplicated communication control devices, and the existing controller is also used. There are three or more. Commanding disconnection or connection of an existing controller connected to itself at almost the same time to a plurality of sets of communication control devices means disconnection command or connection to all controllers managed by the communication control device for each communication control device. A program for continuously generating commands is incorporated in the existing operation monitoring computer, and the new communication control device can be easily realized by operating the table shown in FIG.

Also, switching can be performed in the same manner by controlling a plurality of plant devices with one controller and replacing the line switching device for each plant device in the above-described embodiment with a flag on software. . Also, the switching can be performed in a similar manner by connecting the existing communication controller to the existing controller by providing the new communication controller with a function similar to that of the existing controller connection device by software without adding the existing connection device to the new communication control device.

[0066]

As described above, the present invention operates under the control management of the existing operation monitoring computer except for one controller under the control management of the new operation monitoring computer,
One controller under the control of the new operation monitoring computer is trial-operated so that the new operation monitoring computer can check the plant status. Therefore, it is possible to confirm whether or not the operation of the controller that has been test-run can be monitored by the new operation monitoring computer system, and it is possible to safely perform the batch switching to the new operation monitoring computer system after all the test operations are completed, thereby shortening the update work period.

Also, since the controller performs a test operation while being connected to one of the existing communication control devices, even if the operation monitoring by the new operation monitoring computer system is defective, the controller easily returns to the control management of the existing operation monitoring computer system. Therefore, it is possible to perform the update with high security.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a main part of FIG.

FIG. 3 is a configuration diagram for explaining updating in the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

FIG. 5 is a functional block diagram illustrating an example of a new communication control device according to the present invention.

FIG. 6 is an explanatory diagram of a controller connection management table in the new communication control device of the present invention.

FIG. 7 is a flowchart for explaining the operation of the present invention.

FIG. 8 is a diagram showing an example of a display screen in the new operation monitoring computer of the present invention.

FIG. 9 is a configuration diagram for explaining updating in the present invention.

FIG. 10 is a configuration diagram for explaining updating in the present invention.

FIG. 11 is a configuration diagram for explaining updating in the present invention.

FIG. 12 is a configuration diagram for explaining updating in the present invention.

[Explanation of symbols]

1. Computer for new operation monitoring 2. New network 3,
... existing network, 4 ... new communication control device, 5 ... existing connection device, 6 ... existing operation monitoring computer, 9 ... existing communication control device, 10 ... existing controller, 11 ... process input / output device, 12 ... plant equipment, 13 ... Transmission line, 14 ... Line switching device.

 ──────────────────────────────────────────────────続 き Continuation of front page (71) Applicant 000000284 Osaka Gas Co., Ltd. 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Akira Amita 5-2-1 Omika-cho, Hitachi-shi, Ibaraki Within Hitachi Information & Control Systems Co., Ltd. (72) Akira Kikuchi, Inventor 3-2-1 Sachicho, Hitachi, Ibaraki Prefecture Inside Hitachi Engineering Co., Ltd. (72) Masaaki Shibui 5-Chome, Omikacho, Hitachi, Ibaraki, Japan No. 1 Hitachi, Ltd. Omika Works (72) Inventor Yosuke Segawa 4-1-2 Hiranocho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Ryoichi Saino, Chuo-ku, Osaka-shi, Osaka Osaka Gas Co., Ltd. 4-1-2, Hirano-cho Osaka Gas Co., Ltd. (72) Inventor Nobuyuki Takaji 4-1-2, Hirano-cho, Chuo-ku, Osaka City, Osaka Prefecture F-term (reference) in Osaka Gas Co., Ltd. BB01 CC01 CC07 CC09 CC13 GG04 GG08 GG11 HH22 HH40 JJ01 JJ09 SS01 SS08 5H223 AA01 AA15 BB01 CC01 CC09 DD05 DD07 DD09 EE30 5K048 AA06 BA23 GA12 GB01 HA01 HA02 9A001 BB01 JJ44 KK55 LL02 LL05 LL09

Claims (6)

[Claims] 1. A plurality of units connected to an existing operation monitoring computer via an existing network and transmitting plant data to the existing operation monitoring computer via a duplicated existing communication control device which is switched between a master system and a slave system. In a plant operation monitoring computer system for controlling plant equipment by a controller, a newly installed communication control device connected to a new operation monitoring computer via a new network is provided, and one of the plurality of controllers is stopped. One controller is connected to one of the new communication control devices and placed under the control of the new operation monitoring computer, the controller performs a test operation for driving the plant equipment, and transmits plant data to the new operation monitoring computer. After the test operation is completed, the controller Plant operation monitoring computer system, characterized in that connected to one of the to be placed under the control management of the existing operation monitoring computer. 2. A plurality of units connected to an existing operation monitoring computer via an existing network and transmitting plant data to the existing operation monitoring computer via a duplicated existing communication control device which is switched between a master system and a slave system. In a plant operation monitoring computer system that controls each plant device by a controller, a new communication control device that is connected to a new operation monitoring computer having a display screen via a new network and is switched to a master system and a slave system is provided, One of the plurality of controllers, which is stopped, is connected to the main system of the newly installed communication control device, is placed under the control of the newly installed operation monitoring computer, and is operated by the controller to drive the plant equipment. And transmits the plant data to the new operation monitoring computer and displays the data on the display screen. Shown, wherein the controller is a plant operation monitoring computer system is characterized in that so as to be placed under the control management of the connected to the slave of the existing communication control device the existing operation monitoring computer after commissioning ends. 3. A plurality of units that are connected to an existing operation monitoring computer via an existing network and transmit plant data to the existing operation monitoring computer via a redundant existing communication control device that is switched between a master system and a slave system. In a plant operation monitoring computer system for controlling each of the plant devices controlled by a controller, a dual new communication control system connected to a new operation monitoring computer having a display screen via a new network and switched between a master system and a slave system. A device is provided, and one of the plurality of controllers, which is stopped, is connected to the main system of the newly installed communication control device and is under the control of the newly installed operation monitoring computer, and is predetermined by the controller. Perform a trial run to drive the plant equipment in a pattern and update the plant data to the new Transmitting the plant state to the visual computer and displaying the plant state by the trial operation on the display screen, so that the controller is connected to a subordinate system of the existing communication control device after the trial operation and is under the control management of the existing operation monitoring computer. A plant operation monitoring computer system characterized by the following. 4. An existing operation monitoring via an existing network from a duplicate existing communication control device for controlling plant equipment and switching plant data of a plurality of controllers having a stop period to a main system and a sub system. In a plant operation monitoring computer system for transmitting an operation monitoring of a plant to a computer, a new operation control computer connected to the new operation monitoring computer via a new network and provided with a dual communication control device which is switched between a main system and a sub system is provided. A first test operation in which one of the plurality of controllers, which is stopped, is connected to one of the new communication control devices and the plant equipment is driven by the new controller under the control of the new operation monitoring computer. And the controller is connected to the other of the newly installed communication control devices, and In control managed computer performs a second test run to drive the plant equipment by the controller transmits the plant data in the first trial and the second trial the new operation monitoring computer,
The plant operation monitoring computer system, wherein the controller is connected to the existing communication control device after the end of the second test operation and is under control of the existing operation monitoring computer. 5. A plurality of controllers respectively controlling a plurality of plant equipments to be controlled in number, an existing operation monitoring computer for taking plant data transmitted from the plurality of controllers and monitoring operation of the plant, A redundant existing gateway processor which is provided between a plurality of controllers and the existing operation monitoring computer and switches between a main system and a subordinate system, and monitors plant operation by taking plant data transmitted from the plurality of controllers. A new operation monitoring computer to be performed, a duplicated new gateway processor provided between the plurality of controllers and the new operation monitoring computer, which switches between a master system and a slave system, and the plurality of controllers being connected to the existing gateway processor. Or a connection device for connecting to the new gateway processor; A trial operation of driving the plant equipment by the controller under the control of the new operation monitoring computer by connecting one stopped controller of the plurality of controllers to one of the newly installed gateway processors. The plant operation is transmitted to the newly-installed operation monitoring computer, and the controller is connected to the existing communication control device after the end of the test operation and is under the control of the existing operation monitoring computer. Monitoring computer system. 6. An existing operation monitor having a plurality of controllers for respectively controlling a plurality of plant devices whose number is controlled, and a display screen for acquiring plant data transmitted from the plurality of controllers and monitoring the operation of the plant. A computer, a duplicated existing gateway processor provided between the plurality of controllers and the existing operation monitoring computer, which switches between a main system and a subordinate system, and a plant that captures plant data transmitted from the plurality of controllers. A new operation monitoring computer having a display screen for performing operation monitoring of the plurality of controllers, a duplicated newly installed gateway processor provided between the plurality of controllers and the new operation monitoring computer and switching between a main system and a sub system, and Controllers are connected to the existing gateway processor or the new gateway processor. A connection device for connecting to a processor, wherein one of the plurality of controllers that is stopped is connected to the main system of the newly-installed gateway processor, and the controller is controlled under the control of the newly-installed operation monitoring computer. A trial operation for driving the plant equipment is performed, and plant data is transmitted to the new operation monitoring computer to display a plant state by the trial operation on a display screen of the new operation monitoring computer, and the controller performs the existing communication control after the end of the trial operation. A plant operation monitor connected to a slave system of the apparatus, wherein the controller is connected to the existing gateway processor after the end of the test operation and is under control of the existing operation monitor computer. Computer system.