PLC application in the PCB antioxidant machine

PLC application in the PCB antioxidant machine van dyke trade Gao Fucai welcome to e hall exhibition hall 3 PLC PLC programmable controller, PLC programming cable. 。 。 Abstract: this paper elaborate the simple application of PLC controller in PCB equipment, especially the communication function. Keywords: 1 a transducer, PLC economical host project profile. Project is located in shenzhen longgang district six Lian Village ji electronic equipment manufacturers to develop, the customer mainly PCB equipment industry. PCB, printed circuit board is the basis of the information industry, from the computer, TV to electronic toys and so on, almost all electrical and electronic products in the presence of circuit board. Electronic circuit industry of China and China's electronic information industry, has been maintained a rapid growth in recent years. The growth trend will continue into 2010, or a longer period of time. Especially in recent years the rapid development of China's consumer electronics and automobile electronics industry has provided a broad space for electronic circuit, thus giving impetus to the development of the whole industry chain, such as antioxidant machine is one of the PCB PCB processing equipment. 2. Briefly technological process of the project. Into the plate - chemical cleaning - circulating water 1, 2 to wash city - micro erosion - pump, acid pickling and cycle 3, 4 - DI water washing - blot to blow dry, antioxidant baptism to blow dry, circulating water 5, 6, 7 - DI water washing to suck, dry - drying - out of the plate after startup, all of the cylinder to fill it up with water tank, acid and water regularly, after a full conveyor belt movement, when into the plate in induction plate came in, all of the pump. PCB processing according to the technological process, will be different in the process of time delay. Induction in into the board didn't board or set the number by that time, all pumps and transportation stop standby, induction have a board to work again. 3. Products used: wei lun 6070 I machine ( 1) +的边后卫- 60MA( 1) +的边后卫- CB5 ( 1) + in frequency converter ( 3) Composition, Modbus bus communication. 4. The following article for the whole production line graph: form 1 second, the control system. Programmable controller part: FBs - 60MA+FBs- CB5, complete machine switch, and communication control of frequency converter, and the monitoring of machine operation process. 2. Human-machine interface: wei lun touch-screen, and PLC controller communication, complete the processing and display of process parameters, setting. 3. Inverter: used in frequency converter ( VFD007M23A) , due to the need of the whole production line is divided into three sections, respectively to realize stepless speed regulation, so the machine need 3 sets of inverter. 4. Communication parts: PLC PORT2 communications port and the inverter RS485 connection, with MODBUS protocol communication, composed of the MODBUS bus, realize stepless speed regulation of paragraphs. 5. The hardware block diagram and the function of the control system to complete 1. The man-machine design block diagram and PLC: 2. Important instruction program: 3. Matrix displacement instruction 4. Communication instruction of PLC using only one instruction can complete three frequency converter and PLC communication, which is convenient, the human side. 5. Communication command form description: communication part, through the RS485 interface hardware, by PLC with ModBus communication protocol and the frequency changer of ModBus bus, three motor stepless speed control. PLC has specialized in ModBUS communication convenient FUN150 instruction. M_BUS, is through the form editor, among the parameters of the be clear at a glance, read and write in the following table is the inverter data communications command form: four, project operation equipment put into operation in August, under the environment of acid and alkali as well as the use of stability, strong ability to resist dry approach, customers get the praise, after using PLC and frequency converter communication delay will not happen again in our problem. Has been used for two months, has not yet reflect the bad situation. Five, 1 application experience. The difficulty of the whole program, using PLC and frequency converter will make users feel more convenient communication, reflects the characteristics of humanization, and affordable host can meet customer requirements, saved the cost to the customer. 2. Tabular methods of communication is very convenient to fill in, do not like mitsubishi, Taiwan RS485 communication so troublesome. 3. In the process of programming, because of the large use of the index register, feel inadequate, found no mitsubishi with flexible; There is a combination of mode is not flexible enough. Reference 1. Programmable controller manual I and II use manual. Taiwan motor co. , LTD. 2. VFD - M inverter manual/electric flux.
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