Mitsubishi Q the application of PLC in the tunnel drying oven machine equipment

1. Company introduction stone group co. , LTD is a professional manufacturer of glass fiber, glass fiber as Asia's leading enterprises, has for years been in terms of scale, technology, market, benefit is in the lead. Stone group, the main products are: medium and non-alkali fiberglass roving, chopped strand, continuous glass fiber mat, knitted composite mat, chopped strand mat and emulsion type and powder dosage form chopped strand mat, woven roving, such as enhanced glass fiber products, and electronic grade fiberglass yarn, a total of more than 20 kinds of nearly 300 kinds of specifications. Products are exported to more than 20 provinces and cities and exported to North America, the Middle East, Europe, southeast Asia, Africa and other regions more than 50 countries and regions, products export accounts for two-thirds of the total sales. Rock group 2 factory FA products use very wide, such as Siemens DCS, PLC, schneider PLC controller are applied. For QPLC and mitsubishi servo products also have extensive use. 2. Equipment tunnel oven machine is used for heating of the glass fiber, system requirement for the temperature control is higher, so the system is to adopt PID temperature control. The whole system working principle is as follows: first of all raw materials through the rail car to the tunnel, the gate began to close, stay gate began to open the valve fully closed steam for heating, because of the glass fiber can't be a thermoforming, 15 heating section step by step, so the whole heating process points per period of temperature to the requirement of temperature is different, in order to system is more reliable, each section of the tunnel is installed the upper and lower two temperature sensors, temperature sensors to detect the Q64RD temperature is converted into electrical signals sent to the temperature of the module, the temperature value to set the PLC data storage of D, the PLC controller receives two average temperature, the average temperature and temperature set point, and according to the set of PID parameters PID arithmetic, at last, by Q68DAI modules to convert the output of the obtained PID arithmetic control MV into current signal, is used to control the valve opening, so as to achieve the purpose of temperature control, for a total of 15 period of heating, a total of 15 PID loop, so the whole system control principle of each loop is the same. The tunnel drying oven machine a total of 12 sets, 12 sets of tunnel oven machine through the Ethernet connection into a system, high-speed data transmission through Ethernet can up a machine, reach the upper machine for the purpose of real-time monitoring system. System configuration diagram of the system using the mitsubishi Q02CPU, intelligent function module Q64RD, Q68DAI, I/O module QX40, QY40P QJ71E71 - and communication module 100, the system hardware I/O distribution diagram below: many of the characteristics of the system is to use the module, up to a machine transmission of data is also very much, 12 sets of each set of PLC in the PLC will transmit 30 temperature measured value and the average temperature of 15, and the PID parameters and alarm signals, as well as many switches, etc. , in order to meet a lot of high speed data transmission, we adopted 100 m Ethernet communication, not only can meet the real-time requirement, the system of monitoring also greatly reduces the system configuration and wiring of the trouble. Debugging situation and understanding ( 1) Initialized to the intelligent function module Settings, use the utility package for the intelligent function module parameter set, can the bother of writing ladder diagram. There are two Settings: initialization parameter is set automatically refresh Settings, and the following figure ( 2) For Q68DAI module for 8 channel analog output, when using must sign the dac allows Y0 Y8 ~ '1' to normal in analog-to-digital conversion. After the intelligent function module parameter setting up, found a Q64RD module error, through inspection, the reason is automatically refresh Settings in the data register D50, to use in the ladder diagram program, address conflicts, correct after the problem is resolved. And some temperature module is transferred to the temperature of the data register to 0 or - 2000, for the manufacturer of temperature sensor wiring error, correct wiring, problem is solved. （ 3) User feedback the use of Ethernet, not only improves the speed of the communication to satisfy real-time requirements of a large amount of data transmission, and greatly simplifies the configuration and wiring, shorten the development cycle of the project, and high quality to complete the task on time, the customer is very satisfied with this.
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