KR20030080774A - Remote Terminal Unit for integrated ship automation control - Google Patents

Abstract

PURPOSE: An RTU(Remote Terminal Unit) for controlling ship automation is provided to process various input and output signals although a problem is generated on a communication with an upper system by duplicating the structure of an MPM(Main Processor Module). CONSTITUTION: CPUs(61,71) perform control operations so that a reserve-MPM(70) performs the function of a main-MPM(60) when the main-MPM(60) is downed by failure or an abnormal signal generated during the communication of a server and a video client. CAN(Control Area Network) controllers(62,72) are installed in the CPUs(61,71), respectively, for performing control operations so that a CAN communication with a communication repeater is doubly performed. Main/reserve jumper pins(63,73) connect to the CPUs(61,71), respectively, so that an MPM is recognized as the main-MPM(60) or the reserve-MPM(70) according to the existence of a jumper. A plurality of memories(64,74) store logics downloaded from the server and the video client and programs for operating the CPUs(61,71). An I/O bus(80) transmits and receives digital or analog input/output data with various input and output modules.

Description

Remote terminal unit for ship automation control

The present invention relates to a remote terminal unit (RTU; hereinafter referred to as RTU) for ship automation control, more specifically, the engine temperature of the ship, the contact of each relay, the angle and speed of the ship, The present invention relates to a remote terminal device for ship automation control that can be used in a ship supervisory control system capable of comprehensively managing various valve opening / closing controllers, cooling water, lubricating oil, fuel, and various pumps.

The ship's supervisory control system accepts digital and analog input signals from sensors mounted on various equipment in the vessel from the RTU's Main Process Module (MPM), hereinafter referred to as MPM. When transmitting to the upper system through the communication relay through the communication line of the bus), the status of various equipment is displayed on the monitor of the upper system, or the digital system and the analog output signal from the upper system are transmitted through the communication relay unit, RTU. If the MPM is transmitted through the communication line of the field bus, the MPM refers to a system that outputs to the driving devices of various equipments according to the communication command of the upper system.

The conventional ACONIS-1000 ship automation system used in the ship's supervisory control system performing such a function is composed of various input / output modules, communication relay devices, and hardware of the upper system as a single station. It is necessary to secure a space to install the system, and because of the concentration of various digital and analog input signals and output signals in the yard to the station, There is a problem that causes a lot of man hour loss.

In addition, when the upper system is down by fault or fault signal, logic connected to I / O is stopped, which adversely affects the whole system and related to such I / O logic configuration. As the program worked offline (off-line) is programmed as EPROM, it is difficult for the operator to replace EPROM directly.

Accordingly, an object of the present invention relates to a remote terminal device for ship automation control, which can solve the problem caused by the digital and analog input signals and output signals from various facilities concentrated in a central system by being distributed in each yard of the ship.

Another object of the present invention is to redundancy the structure of the MPM so that even if a problem occurs in communication with the upper system, its own logic is performed to process various input and output signals. It relates to a remote terminal device for ship automation control.

In order to achieve the above object, the ship automation control remote terminal device according to the present invention is distributed and installed in each yard of the ship (server) connected to a redundant LAN between the communication relay for performing heterogeneous communication server and video A main process module (main-MPM) and a reserve-MPM (main-MPM), each connected to a redundant CAN to communicate with the client, and having the same configuration inside for redundant Process Module) is provided.

1 is an overall configuration diagram of a ship monitoring control system according to the present invention.

Figure 2 is a block diagram of the main process module of the remote terminal device for ship automation control according to the present invention.

3 is a flow chart of the main process module redundancy algorithm of the remote terminal device for ship automation control of FIG.

Explanation of symbols on the main parts of the drawings

10: server and video client 20: RTU

30: communication repeater 41: LAN-main

42: LAN-reserved 51: CAN-main

52: CAN-Reserve 60: Main-MPM

70: Reserve-MPM 61, 71: CPU

63, 73: Main / Reserve Jumper Pins 64, 74: Memory

80: I / O bus

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is an overall configuration diagram of a ship monitoring control system according to the present invention.

Referring to FIG. 1, the ship monitoring and control system 1 according to the present invention stores various logic, input information, and output information of a ship as a database and monitors MMI (Man-) of monitoring. A plurality of server and video clients 10 showing a machine interface, and digital and analog input signals input from sensors installed at various yards installed in various yards in the vessel, the plurality of servers and video clients 10 And a plurality of RTUs 20 for receiving various logic and input information inputted from the server and video client 10 and outputting them to various facilities, and the plurality of servers and video clients 10 and RTUs. Communication repeater 30 for controlling communication between the 20 is provided.

In this case, LAN (Local Area Network) communication is performed between the server and the video client 10 and the communication repeater 30 to improve reliability, and the server and video client 10 and the communication repeater 30 are redundant ( and a LAN-Main 41 and a LAN-Reserve 42 each configured in redundancy.

In addition, CAN communication is performed between the RTU 20 and the communication repeater 30. Each of the RTU 20 and the communication repeater 30 is a CAN-main (CAN-Main) 51 and CAN- It is connected to the CAN (Reservation) (52), respectively.

The RTU 20 is capable of data input / output of up to 64 points, and includes a main process module, a digital input module, a digital output module, and an analog input. It consists of a module (Analog Input Module), analog output module (Analog Output Module).

At this time, the various input and output modules inside the RTU (20) is composed of a compact (compact) module to be easily removable, easy to maintain and improve the performance of the overall ship monitoring and control system (1).

2 is a block diagram of a main process module of a remote terminal device for ship automation control according to the present invention.

Referring to FIG. 2, the RTU 20 according to the present invention is a main-MPM 60 and a reserve-MPM 70 connected to a redundant CAN-main 51 and a CAN-reservoir 52, respectively. It is composed.

The main-MPM 60 and the reserve-MPM 70 each include a CPU 61 and 71, a main / reserve jumper pin 63 and 73, and a plurality of memories. (64) 74 and I / O bus (Input / Output Bus) 80 is provided.

Each of the main-MPM 60 and the reserve-MPM 70 has a jumper connected to the main / reservation jumper pins 63 and 73 connected to the CPU 61 and 71 according to the presence or absence of a jumper. It is divided into a main-MPM 60 or a reserve-MPM 70. That is, when a jumper is connected to the main / reserve jumper pins 63 and 73, it is recognized as a main, and when a jumper is removed, it is recognized as a reserve.

When the main-MPM 60 is down due to a fault or an abnormal signal during communication with the server and the video client 10, the CPU-61 and 71 reserve the main-MPM. Control to perform functions. At this time, the main / reservation check between the main-MPM 60 and the reserve-MPM 70 is performed through a heart beat check.

In addition, the CPU 61, 71 is equipped with two CAN controllers (62) (72) for controlling the CAN communication with the communication repeater 30 in a redundant manner.

The plurality of memories 64 and 74 are in the form of a ROM or a RAM, a program for driving the MPMs 60 and 70 and logic downloaded from the server and the video client 10. Is stored.

The I / O bus 80 exchanges digital / analog input / output data from various input and output modules inside the RTU 20.

Referring to the accompanying drawings, a driving example of the remote terminal device for ship automation control having the above configuration is as follows.

3 is a flowchart of a main process module duplication algorithm of the remote terminal device for ship automation control of FIG. 2.

Referring to FIGS. 2 and 3, when the CPU 61 and 71 are initialized (S301), the CPU 61 and 71 are mounted on the main / reserve jumper pins 63 and 73. It is determined whether each of the MPMs 60 and 70 is the main-MPM 60 or the reserve-MPM 70 according to the presence or absence of the jumper (S302).

At this time, if a jumper is connected to the main / reserve jumper pins 63 and 73, the CPU 61 and 71 recognizes the MPM to which the jumper is connected as Primary, and recognizes the MPM to which the jumper is not connected as Secondary. .

As a result of the determination, when the MPM 60 is recognized as Primary, it is determined whether the secondary is alive through the Heart Beat Check (S303). At this time, if the secondary is alive, it is switched to the secondary and the reserve-MPM 70 performs CAN communication (S312). If the secondary is dead, the main-MPM 60 performs CAN communication (S304).

If CAN communication is not performed by the main-MPM 60, it is determined whether communication is performed after waiting for a set time (S307). At this time, if communication is not performed even after the set time has elapsed, it is determined whether communication is performed after waiting for a predetermined time again (S308).

As a result of the determination, if the communication is not performed, the Heart Beat Check is performed after resetting the communication driver and resetting the self-watchdog system (S313). At this time, as a result of performing the Heart Beat Check, if the main MPM (60) is down state is switched back to Primary (S314).

On the other hand, if the main-MPM (60) is performing the CAN communication in step S304 (S305), and the heart beat of the main-MPM (60) is transmitted to the secondary (S306).

MPM of the remote terminal device for ship automation control according to the present invention through the redundancy algorithm as described above, even if the main-MPM (60) is down, the reserve-MPM (70) performs the function of the main-MPM again the performance of the entire system To improve.

What has been described above is just one embodiment of the remote terminal device for ship automation control according to the present invention, anyone of ordinary skill in the art belongs to the scope of the present invention to the extent that various modifications can be made It will be said to have a spirit.

As described above, the remote terminal device for ship automation control according to the present invention has the following effects.

First, it is distributed in each yard rather than a centralized system to replace various signal cables in the center with a communication line has the advantage of easy cost reduction and maintenance by the cable.

Second, when the upper system is down, the I / O logic configured in the RTU is processed independently to improve the reliability of the system, and the I / O logic configuration is downloaded online through the communication line, requiring the existing operator to replace the EPROM manually. By solving the difficulties, maintenance and system upgrade (Up-Grade) is convenient.

Third, since the MPM is configured in redundancy, even if the main-MPM is down, the reserve-MPM becomes the main-MPM, thereby improving the performance of the entire system.

Claims (2)

It is distributed in each yard of the ship and connected to the redundant CAN to communicate with the server and the video client connected to the redundant LAN with the communication repeater performing heterogeneous communication in between. A remote terminal device for ship automation control, characterized in that the main process module (Main Process Module) consisting of a main-MPM and a reserve-MPM having the same configuration for redundancy therein. The method according to claim 1, wherein the main process module, A CPU that controls the reserve-MPM to perform the functions of the main-MPM when the main-MPM is down due to a failure or an abnormal signal during communication with the server and the video client; A CAN controller mounted inside the CPU and controlling CAN communication with the communication repeater to be performed in a redundant manner; A main / reserve jumper pin connected to the CPU so as to be recognized as a main-MPM or a reserve-MPM depending on whether a jumper is present or not; A plurality of memories in which logic downloaded from the server and video client and a program for driving the CPU are stored; And An I / O bus (Input / Output bus) for transmitting and receiving digital or analog input / output data from various input and output modules is provided.