Changzhou XunYi Automation Equipment Package Co.,LTD.

Anqing Petrochemical currently generating the necessary heat and power plant fuel - mainly coal by rail and sea supply two lines. Its coal handling system has been part of the railway used PLC control, the system's automatic and manual mode of operation. The sea is still a regular part of the relay logic control, only through the console button operation. This outdated equipment, a large number relay, frequent movements, contacts easily damage the high failure rate and can only be used to manually control the scene, the scene between the need to control room and telephone links, the whole system Sub-Commitment, a low degree of automation Is not conducive to dealing with the accident, a serious impact on the normal operation of the production.

Coal handling system to achieve security, stability operations, the coal handling plant control system of waterways part of the transformation to IPC for the man-machine interfaces, using PLC PLC, the abolition of the original console button operation, following the Electric chain and the show was simple analog control, the entire operation process flow chart drawn into a dynamic screen, through the IPC and surveillance operations.

Since the riverside for the control of the terminals by the belt-Meiyun sent to the field of coal or coal bunker of the entire process of equipment. Control system, including the transformation of coal terminal handling chain monitoring system (see Figure 1) and coal handling plant interlocking system (see icon) in two parts, interlocking relationship is actually reverse the direction of the flow of coal, that is, only the latter Launch and normal operation into the state, the former can be activated. Coal handling system of the factory belt machines for dual-band, formed a separate A and B both on two-way systems operate independently and two independent cross-operating mode.

The whole interlocking system of control targets, including 23 major belt and its auxiliary equipment control, detection and alarm. The main control parameters completed 23-and 14 belt precipitator start and stop detection, including the main parameters of the belt of the light deviation, weight deviation, a parked state, cable switch, speed switch, switch, etc. State of the display and motor current value of the show, but also fork of the location, coal-cylinder lagging, with the exception of large wood plow coal, fighting turbines, Separators, belt scales, coal and nuclear scale warehouses and other auxiliary equipment Level of Status and parameters of the show, the whole interlocking system of import, export points are shown in Table l.

Equipment Name	DIPoint	DOPoint	AIPoint
Belt machine23Article	723	23	23
Precipitator14	14	14
Fork of the position6	6
Coal-cylinder baffle18	18
In addition to the wood	1
Coal-Plough	1
Doo turbines	1
Separators3	3
Belt-scale, the nuclear scale			3
Coal Wharf Level			3
other	4	1
sum	209	38	29

The entire span of the waterborne coal handling system, equipment scattered at the scene poor environment, the adoption of a set of centralized management of distributed control system, not only can reduce the length of the entire system of cables and construction of the project, which has greatly improved the reliability of the system and The level of automation. In view of the system of import, export volume is the main switch of the entire sequence of control logic control, the choice of the AB's system of small SLC500 PLC, the main controller of a series of products can be extended a number of remote control stations, Compared to control objects scattered, large-span of occasions, but extended a remote station also needs an additional cost, remote location and the number of stations identified the need to consider their cost performance, integrated various factors, the present system of using the 1 A master control station with three remote control stations of the system structure (see Figure 3).

Coal handling system at sea in accordance with the actual operation of equipment and distribution, the main control system installed at the new control room, in # 8, 9 # 'stations and coal-plow operation rooms were set up at the scene l remote control station, the scene of the imported equipment , The output signals in accordance with the principle of local people into the remote control station. Of these, coal terminal handling systems through the transformation of the electrical chain signals directly from the new distribution of low-voltage switchgear indoor sent to the control room instrumentation counters Pl; plant coal handling system of interlocking signal is taken from the scene of the operating room The switchgear, including eight # Station, the plant control room operator at the scene of the electrical switchgear (7 # P A and B, 12 # P belt A and B) chain signals were sent to the station at 8 # operating room instrument counters P-2, 9 #, # 10 stations operating room at the scene of the electrical switchgear (13 # P A and B, 14 # P belt A and B) chain signals were sent to the station at 9 # operating room instrument of a counter p 3, plow coal-site operation of the electrical room Switchgear (15 # P A and B, 17 # P belt A and B) chain signals were sent to the scene plow operators of coal-meter room counter P-4. The remote control stations through remote I / O modules from l-kan communication cable, you can achieve with the main control room of signal transmission between the controllers (see Figure 4).

PLC control system from the PC (including computer console, etc.) and the PLC (with the cabinet, and so on) two parts.

The system in the control room set up a Taiwan IPC, while operating with a keyboard, mouse, and so on, through the installation of device drivers RSLINX achieve and PLC communications. IPC has strong data processing and anti-jamming capabilities, based on the Windows installation under Windows platform, the Chinese version of RS View32 configuration kits and packages run through the realization of the configuration and installation of program-controlled exchange of information.

PLC control system is the core of the equipment, responsible for the input and output, logic operation and communication. PLC some of the major include the following modules: CPU template, power templates, communication templates, EEPROM memory templates, remote I / O scanner templates, remote I / O adapter template, the template switch input, switching output templates, analog input template , Rack, dedicated cables.

PLC operating system software, including control software and PC configuration software in two parts.

PLC operational control software for AB 9324 provided a RLD300ENE programming software, the whole system run mainly by the PLC in curing the control software to achieve, the software programming language used ladder, the main import, export volume in the corresponding PLC The address allocation, operational control switch status, normal, fault and the logical relationship between the state of emergency treatment and the host computer and communications functions.

PC configuration software for the Chinese version of RS View32 software development, through the configuration for the end-users can directly display and operation of human-computer interface, the software mainly by the system configuration, monitoring screen design, alarm processing, database design and safety of Several components, such as setting a function. After configuration control waterborne coal handling system interlock system, including the main screen of the old screen, dominate the screen, the monitor screen auxiliary equipment, belt-run frame, laid on the screen test status information, alarm display, the display screen, and other trends.

CRT operators in the control of the transmission methods and ways to choose, in order to achieve the entire coal handling system equipment control and animation show the whole chain processes, to the way the arrow directions interlock operation order. The control system is divided into focus automatically, chain manually, and the scene manually unlock the manual operation of four kinds of ways, through various methods alignment Commitment coal handling system.

Coal Handling on automated means to achieve the automatic control system, fully completed by the PLC system under normal circumstances, the cycle of operational control, the abnormal circumstances of the failure to protect and control the police, emergency circumstances, the system control and fault alarm.

Chain manually operated as semi-automatic control, by the operator through the use of the mouse or keyboard on the man-machine interface one-on-one start and stop buttons on the device through the host computer and communications between the PLC will command gave PLC, thus achieving Manual stop any equipment that goes against all the coal flow direction of semi-automatic control equipment downtime purposes.

Unlock the manual operation means that the coal on the circumstances, from the top operators in the plane manually start and stop any one device, this time without any interlocking relationship.

Scene by scene manually operated switch on the operational status of equipment to control, the equipment can not afford at this time Master Control Room control.

General Maung screen: Showing all of the belt and auxiliary equipment for the state.

Dominate the screen: dynamic display the entire chain process and the status of the belt-and-arrow approach to instruction sequence chain operation.

Belt machines running the screen: the display of belt-operation, dynamic show that coal handling process, and show that current trends.

Glance screen test status information: belt-list show the work of state control, and current real-time, location and forks Duster tube, Separators, with the exception of the wood, Suimei, among others, the work of state.

Alarm screen: the current show that the belt-limit, speed switch, coal blocking signals, cable switch, re-deviation, such as light deviation state, and automatically make the appropriate alarm processing, and to record-keeping.

Trends in the display screen: Showing belt scales and weigh scale real-time trends and historical trends.

In the control room operation platforms emergency stop button, and emergency situations to stop coal system functioning of all equipment.

By setting different levels of security operators a flexible user-defined password operating authority, to achieve the security and reliability.

In the PC screen control settings reset button, the device when the security action, and some of the associated equipment will be closed, only be reset after the restart the system.

PC screen in the main control set up checks and pre-launch button, to check all the major equipment and auxiliary equipment is in place, not in place in case the system will not automatically interlock.

PC through the dynamic display of the current value of the machine belt and trends, and to achieve the current limit alarm, thereby enhancing the security of the whole system.

PLC process control systems used throughout the coal handling system so that the level of automation has been greatly improved, and the coal handling system of automatic, security and stability operations.

PLC system through the application and improve the reliability of the control system, control system to solve the relay because of malfunction and the impact of production problems. Through the application of software failures, operators may at any time to correct mistakes in the operation and rapid diagnostic equipment failure.

by setting three remote I / O station, a communications cable directly to the signal transmission to the control room, saving a great deal of control cables, but also greatly reduce the construction and installation costs.

PLC system because of the flexibility can be easily changed through the application process parameters change at any time, increase control, it is bound eventually replace the traditional relay control.

Author high-fang, F, 1973 Health, graduated from Zhejiang University in 1994; have been engaged in the design of automatic control, has published four papers.

The superiority of the target flowmeter