The sea for domestic PLC application in welding automation industry

Key words: automation of welding inverter communication introduction: in the modern manufacturing industry, along with the increase in product variety and the continuous improvement of product quality requirements, up to the higher requirement to the welding process, so that many have a manual welding product demand for welding automation equipment and requirements also more and more. And how to improve the welding equipment for the adaptability of products has become the primary problem facing number of welding equipment manufacturers. Now on domestic sea for ( Haiwell） The system application of PLC in this regard. Solution: as shown in the above, the system is mainly with text display, programmable controller, inverter, etc. Working principle: using Haiwell communication function of PLC is easy to use: standard configuration 2 communication port, and a RS232 communication port, a RS485 communication port. With Haiwell PLC RS485 communication, mouth and converter control frequency converter operation, stop, speed and reads the inverter running state and the output frequency. Through Haiwell RS232 port of PLC communicate with text display, for welding process parameters setting. System advantages: 1, the use of Haiwell free communication protocol of PLC instruction COMM with Fuji inverter state of operation control and read. All Haiwell PLC communication function are an instruction implementation are available, and don't need to special, special register programming, also need not more than management communication instruction sequence, under the same conditions can write multiple communication instruction at the same time. 2, 1 Haiwell PLC controller standard RS232 and RS485 1 mouth, and any a communication port as a host also can be used as from the station. Any a communication port as a programming port, also can be used as a communication port with a third party equipment. In this application, with text display communication by RS232 port, with RS485 mouth and Fuji inverter communication. 3, the use of communication to realize the inverter speed regulation and operation control, greatly enhance the anti-interference ability of the system, and greatly improve the system stability and reliability of welding occasion in strong interference. 4, the use of communication to realize the communication of frequency converter, DA saves PLC module, greatly save system cost, and easy to realize to different products require different process control parameters ( Welding speed and welding time) Requirements. The main hardware configuration: 1, programmable controller: HW - S32ZS220R 1 2, frequency converter: FVR0. 4E11S- 7JE（ 富士) 3, text display OP320A - 1 S（ Xinjie） Stage three, programming window: 1, the use of the realization of the COMM instructions are very easy to communicate with Fuji inverter. When written in COMM command communication protocol, can choose according to the register low byte ( Low 8) Sending, and receiving data is still based on 16-bit receives and automatic storage to directive specifies the address, the user programming greatly simplified. ; 2, the use of communication functions of control frequency converter, greatly improve the accuracy of speed control, and simplifies many D/A conversion of the original digital quantity - — Quantity - — Display value between conversion program. Iv. Conclusion: use of the sea for programmable controller ( Haiwell PLC) Convenient communication function and convenient set of instructions, satisfied the welding automation equipment manufacturers of equipment widely adaptability requirement. Can be widely used in the industries of welding automation equipment supporting occasion.
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