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Using drives in mixers

Created by: Mohamed Elbarbory at: 6/30/2011 4:03 PM (5 Replies)

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6/30/2011 4:03 PM	Rate (0)
Mohamed Elbarbory Posts: 7 Rating: (0)	Dear Experts, We are 5 students participated in a project, its name is (Mixing tank with level control), it includes making a mixer for mixing colors or any other liquids, the main point in such a project is to determine the level of the liquid using sonar bero sensor. We will use 2 motors, one for the agitator and the other is for the inlet pump to control the floe of water. The question is what are the other operations which can i make in the mixer using drives. What are the available operations that can be done in the mixer using MicroMaster 440. We have alot of drives and motors in our lab which can we use in our project if we make any modifications. Kindly send to me links or Pdfs which may help me in that topic. Sincerely, Mohamed Elbarbory
Mohamed Elbarbory Posts: 7 Rating: (0)
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7/5/2011 4:44 PM	Rate (0)
Mohamed Elbarbory Posts: 7 Rating: (0)	am waiting for an answer please
Mohamed Elbarbory Posts: 7 Rating: (0)
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7/5/2011 6:59 PM	Rate (1)
dchartier Grandmaster Joined: 9/27/2006 Last visit: 11/18/2024 Posts: 12294 Rating: (2691)	Hello Mohamed; You raise a very interesting question, that deserves an answer. However, since this is an open forum, where members from all over the world join and participate, and have their own work and sleep schedules to keep, I would suggest more patience on your part. Expecting an answer within half an hour of posting the original question will bring you more grief than good... A drive is a type of motor starter/controller that is used to set a variable speed or torque setpoint on a motor. Direct-starting a motor will accelerate it to its nominal speed and torque, where it will remain until you turn the power off.A soft-starter (or different combnations of start circuits, such as Delta-Y) willextend the initial acceleration ramp time, in order to produce a softer start; but in the end it will reach its nominal speed and torque, and run at that speed for the duration. Only a drive can vary the speed that the motor will be running at, when it is configured and wired properly. What more can it do in your mixing application? Not very much, but it can help you do it in a very precise and efficient manner. Let us start with the following document, that describes basic operations of a Siemens drive, so you can see different how parameters of a drive affect its running: http://www.legacypower.net/Documents/ACDriveInformationPDF/SiemensACDriveEngineeringData.pdf It also discusses different means of controlling the start/stop of a motor, using terminal blocks and networking (Profibus-DP). Also, have a look at this applicatioon example, it resembles what you are trying to do : MICROMASTER 4: PID filling level control with bumpless operating mode changeover hope this helps, Daniel Chartier

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8/3/2011 8:29 PM	Rate (0)
jfrancisco Posts: 3 Rating: (0)	Hello Mr. Chartier; I have an application that implies 2 drum and one Pump, I have 3 micromaster 420, two of them for the drum agitators and one for the pump, now my application requires that I be able to stop the pumping if I dont have product in the drums, this is a problem because the pump is working without product and the piping is dry, The start/stop and the speed commands are given via BOP with the keys and it is excellent this kind of control, but my Question is: Can I use a Digital Input in order to put a contact level signal in the drive in order to stop the drive if no product in drums and the commands (Start/Stop and Increase-decrease speed commands) continue with the BOP keys? I hope that you understand my requirement, I read something about it and the micromaster manual referred me to the BICO commands but I have never used them. Please Help me, Thanks in advance
jfrancisco Posts: 3 Rating: (0)
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8/4/2011 2:58 PM	Rate (0)
Alan S Regular Member Joined: 1/31/2011 Last visit: 10/9/2023 Posts: 21 Rating: (3)	Yes, you can. Select a DI. For example, the first one. To enable BICO on that DI, put P0701 = 99. Then, you may use it on BICO Command Parameters (you can see them at Parameter List of MM420). If you select the first DI, you should put P0722.0 in the parameter that you want to use. To stop your drive, you may use P0840 (ON/OFF1), P0844 or P0845 (OFF2), P0848 orP0849 (OFF3). Just pay attention, OFF2 and OFF3 are low actives. This is BICO tech.

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8/4/2011 4:59 PM	Rate (0)
jfrancisco Posts: 3 Rating: (0)	Dear Alan; Thanks so much for the answer, I 'm going to try it in the process.
jfrancisco Posts: 3 Rating: (0)
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