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Showing results for tags 'wireless communication'.
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Aluminium extrusion Machine My customer had a complete automatic aluminium extrusion machine which had a S7-300 in main extrusion machine and two S7-200 PLC in conveyor system. The conveyor system has a trolley which travels 40m in both direction in high speed. There were some hydrollic system on the trolley which use to clamp the aluminium profile and pull it out of the extrusion machine. The trolley use to automatically synchronized with the speed of the extrusion. There was one more S7-200 plc in trolley system which use to control the hydrolic system in the trolley. Both the PLC in the trolley as well as the main panel were connected to each other through a bus bar system to exchange communication signals while the trolley was moving. Trolley use to have frequent breakdowns due to communication error between the plc. I was given this task to make this system more durable. The first thing i did is replaced both the S7-200 plc with V130 PLC. In the trolley we installed the V130-j-TR20 and in main panel we installed V130-J-TR34 with IO_AI4_AO2. Then we developed a new program and synchronized every thing with the extrusion machine as it was before. V130-J-TR20 was in the trolley and V130-J-TR34 was in main panel and they need to be communicated with each other so that all trolley function should work. The previous system was bus bar system and was causing frequent problems, so i decided to go for a wireless communication system. I took two simple TP-link routers and installed one in trolley with v130-tr20 and other in main panel with v130-tr34. Then i setup a modbus ip link between them and exchanged all my signal between them. See the link of the video below https://www.facebook.com/shriramauto/videos/927412653974856/ https://www.facebook.com/shriramauto/videos/927412367308218/ https://www.facebook.com/shriramauto/photos/pcb.927396570643131/927395883976533/?type=3 https://www.facebook.com/shriramauto/photos/pcb.927396570643131/927395853976536/?type=3 https://www.facebook.com/shriramauto/photos/pcb.927396570643131/927395827309872/?type=3 Now the system is working perfectly and once again unitronics proves that it is the best and most user friendly PLC.