2022.08.09 PC frequency control by protocol rs 485

Desktop Apps, Embedded Systems & Microcontrollers — incorrectly specified categories?

112 USD

Project translated automatically. Log in or register, to view the original Technical tasks: 1) PC frequency control by protocol rs 485 Modbus RTU with PR, according to the logic, 2 modes: manual, automatic 2) programmed rally: OMRON, Lovato, Schneider Electric, Simens 3) PC: Lenze ESV223N04TXB (22kW), now Ylmaz NZ2400-22G/30P Conditions of: 1) On the basis of the existing scheme to develop the scheme on the basis of the programmed relay to implement the control of the twist frequency of the engine 22 kW from its current (A).2) Connect with the frequency converter to be implemented by Modbus protocol (RS-485).3) The scheme must be implemented for two working modes: manual and automatic.4) The launch of the oil press takes place with the participation of the operator and then the manual switch is transferred to the automatic mode.5) Work in the automatic mode requires the following algorithm: The criterion of the necessary load of the engine is its nominal current (nominal current of the engine 40A); - the size of the nominal current can change if necessary (the engineer of the PNR must be able to change the "necessary" current); - manually switch to automatic mode; - and in the automatic mode, the frequency of the engine should slowly decrease (0.5 Hz/min) until the current of the engine reaches: 2 A less than the "need" current. The frequency of the engine turns should slowly decrease (0.2 Hz/min) until the current of the engine reaches the specified current. - in the event of achieving the given current, it must beined in a constant value (the mechanical load on the engine will be cyclical and change within -10 ... +5%); - in the event of unforeseeable situation - when the current of the engine increases more than 41 A, the current frequency should increase rapidly (0,5 Hz / s) (to avoid the overload of the press engine) until the current of the engine reaches 35 A; - after balancing the current of the engine to 35 A, we restore the work slowly reducing the frequency of turns of the engine to the specified nominal current; - emergency situations on the current of the engine from the frequency converter and the heat relay of the electric-motor must be provided; The accident must be accompanied by the corresponding message on the display of the programmed relay; - the transition from the automatic mode to the manual must be carried out by the manual switch; the frequency on the PC must be left as in the automatic mode (more regulated by the manual); - Frequency control range in automatic mode 30 - 60 Hz.Frequency converters that can be used in the scheme: ESV223N04TXB (22kW) "Lenze"; NZ2400-22G/30P Yilmaz The product: 1) Program or consistency of logical functions for PR programming (programmed relay).2) Electric scheme principle: closets with PR (controller) 3) Developed instructions for PR programming with support contacts for the programming of the 1st study sample.

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Sergey Guyva

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Budget: 5000 UAH Deadline: 14 days

Good day !
I can realize your task on Siemens LOGO! or Schneider Electric Zelio - to your judgment. I would recommend Siemens LOGO!
I'll make the shapes of the management cabin, and the shapes of the field equipment connection.
I can collect the control closet, come for installation and start-up works.

Ihor Brovchenko
Cherkassy, Ukraine

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2022.08.09 PC frequency control by protocol rs 485

Sergey Guyva

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