1, the system introduced PLC control system for use Coal Handling the French company Schneider Unity Series PLC, the host model Unity67160. Digital input module 140DDI35300, each module 32-channel, digital output module 140DDO35300, 32 channels per module, analog Module 140ACI04000, 16 channels per module, the system uses the CPU hot standby, supports two remote stations in the control room with side cabinets and distribution side of PLC control cabinet, two industrial operator control stations, coal Kurama has side control cabinet, the communication protocol with Modbus Ethernet protocol. Second, the control system equipment 3 belts, 3 fan belt, 2 filter, w Roman "> 2 the vibration to the coal machine, 1 disc separator, 1 belt separator, 1 broken machine, 2 anti-blocking devices and 9 sets of coal plow device. Control System in all the input and output signals were isolated by relays to improve the system s anti-jamming capability and protection of PLC module in order to avoid high current signals into the damage. PLC control cabinet and remote I / O control cabinet of IK relay is 220 volts, OK e = "font-family: Arial; mso-ascii-font-family: Times New Roman ; mso-hansi-font-family: Times New Roman ; mso-bidi-font-size: 10.5pt; mso -bidi-font-family: Arial; mso-font-kerning: 0pt "> relay with 24 volts. Third, software configuration Programming software configuration of the system using Schneider s UnityPro programming software. Advantages of this software is a powerful function block system, different functional pieces have a function corresponding to the programming simpler. Host monitoring software of this system is used Intellution s iFix3.5 as a development platform, can be easily generated for the user to run user process data files and generate reports. Use E5 body; mso-font-kerning: 0pt "> (2) control system 2 CPU installed in two racks, each other before the hot spare CPU power as the host. Two rack power from auxiliary power UPS power supply. 2 CPU in exactly the same procedure, when the redundancy switch, the corresponding communication port of the respective address will “ main ” PLC, and “ standby ” PLC automatic exchange between. This addresses the exchange of the Ethernet and Modbus Pluso-hansi-font-family: Times New Roman ; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: Arial; mso-font-kerning: 0pt "> port is unconditional. collecting information, processing procedures, the completion of an order by the main CPU, the main standby CPU CPU work in real-time tracking. hosts connected via Ethernet with PC, exchange data, collected by the CPU by judging the input signal, pre-programmed procedures for this processing, then the output module order to achieve the control purpose. Quantum CPU140CPU 671 60 will have a dedicated co-processor, LCD display can be diagnosed through all the hot spare parameters. through the keypad and display can be on the CPU diagnosis, and can configure some parameters, and monitor the implementation of parameter values and the start of the CPU Stop. (3) the remote system Taking into account the PLC module and the distributed devices to connect using the Ethernet network topology elements, switches better than hubs. The type used for the ring network topology, copper and coaxial cable connection. PLC mutual backup link between the use of MTRJ fiber optic connectors. In the hot standby system for the structure of the main PLC and the interconnection between the auxiliary PLC. I / O tyle = "font-family: Arial; mso-ascii-font-family: Times New Roman ; mso-hansi-font-family: Times New Roman ; mso-bidi-font-size: 10.5pt; mso -bidi-font-family: Arial; mso-font-kerning: 0pt "> remote station method adopted for this application, greatly reducing the number and length of control cable, reducing the long lines caused by ground or and poor wiring fault Also reduces the cost of inputs; and remove the voltage, current interference and improve the quality of data transmission. Fifth, the equipment control mode Device control in the following ways: (1) interlocking Manual: This mode is to start the process of the device according to reverse the direction of coal flow in one to one start, according to the direction of coal flow along one-stop, action processing of the protection device with automatic control mode .i-font-family: Arial; mso-font-kerning: 0pt "> (2) Automatic mode: In accordance with pre-set start or stop the process related equipment, is a normal operation mode, required on-site equipment must be in a normal state. Automatic control for the system the best way, in this way, the shortest running time of no-load equipment, the operator steps to a minimum. (3) In situ methods: in-place operation automatically selects the button box on the handle hit the spot position on the issue from the control box or switch start and stop commands to control equipment on the site. In this mode, PLC lost control of the function of this device. In the chain must manually process a single under the boot device. In Unlock mode can be any start of a piece of equipment. Single piece of equipment operation9A with a stop. Belt weight deviation, vertical tear, slip, block coal pipeline signals directly into the PLC, once one of a certain incident occurs, the system should alarm the screen should be treated in accordance with the scene, control, and states are able to shown in Figure 2. When the end of the coal immediately “-way stop ” operation. Way stop operating under the selected process from the beginning of coal resources and equipment along the direction of coal flow by station by a predetermined delay time to stop the equipment until the order Last one device. Delay time is to ensure that each device of the coal operation has completed only after the equipment downtime. 6, the system s alarm Overview Fault reset: When the start command issued by a device to run the signal, but no feedback, display timeout fault, pressing this button will reset the fault, if fault is still there to be unlocked manually selected by “ stop ” button. System Reset: System boot process if unforeseen circumstances should be here to cancel the end of the boot system startup command. Then “ system to stop ” command, the system in order to stop. Alarm silencer: a devicePLC cabinet is failure of the buzzer will sound, press the button after the operator confirmed that the sound can be eliminated. 7, belt weigher Belt scale output pulse calculated cumulative amount of instantaneous flow and total volume of the coal. 8, anti-blocking device Anti-blocking device to participate in the original design of PLC program control interlock. However, run-time debugging and interlock, Anti-blocking device for The monitoring and control can not be programmed to drive false signal, thus affecting the whole system work. Anti-blocking device after the removal of program-controlled interlocking, Coal block issued only signal By the operator on the PC “ manually ” Or field “ local way ” control. To start rapping motor block coal (Rapper conduct electrical field amplitude can adjust the size). 9, PLC cabinet panel operation har-indent-count: 2.0; mso-pagination: widow-orphan "align =" left "> PLC cabinet has three indicator lights: system operation, the system stops and alarm. the system automatically runs “ system operation ” lights, the system automatically stop when the “ system to stop ” lights, equipment failure “ alarm ” lights. light Here is the button: a # system input / 2 # system inputs, the system automatically, the system starts and the system stops. When choosing South line when the select switch “ 1 # system is put in ”, when you select the North line of the selection switch to “ 2 # system into ”. the system automatically select switch to the left when “ system automatically ”. need to start by “ system startup ” button for 2 seconds, to stop press “ system to stop ” button for 2 seconds. Once an emergency press the red “ emergency stop ” button. ily: Arial; mso-ascii-font-family: Times New Roman ; mso-hansi-font-family: Times New Roman ; mso-bidi-font-size: 10.5pt; mso-bidi-font- family: Arial; mso-font-kerning: 0pt "> 10, concluding remarks The system according to the actual operation of the current show: the whole system safe and reliable, high stability, control flexibility. With the increase in computer and PLC technology, the automation of coal handling system is also rising, now done to all the equipment is relatively decentralized centralized control of the situation together, cover almost all the equipment, devices can automatically order Kai / stop, manual operation to PC, indicating that the current automation level. We believe that with the development of China s power industry and the computer, PLC hardware and software continue to enhance, process control, as coal, the main control method will be more widely used.