Figure 3 Wiring diagram for the YF-S201 flow sensor. Since the flow sensor at hand is a pulse-output sensor, it is impossible to perform this test because the normal state of the internal hall effect sensor is not known. Is your DI card rated for the speed at which you are trying to see pulses? The K and D factors on the meter will affect the accuracy of your meter's flow reading/totalization. Microsmart is also rebranded as Schnedider Electric Twido , and although I did not used Microsmart I have used Twido and I have used HSC without resistors and with flowmeters, so I could say that you do not need resistors. The measurement of water flow is not very difficult. It can use together with computer control systems such as secondary displays, PLCs, and DCS. At least 2 of the manuals reference a pull-up resistor but the IDEC Tech didn't seem to think they were necessary. This website uses cookies to ensure you get the best experience on our flowmeter area series Often a flow meter will require a high speed input card. Why not increase the value of the pulse? MD10 :- Memory word for final output (L/H) of flow meter, MD18:- Memory word for final output (L/Sec) of flow meter. How to Configure an Alarm in InTouch SCADA? One additional method that just came to my mind is to integrate the flow value if that data is avaible. We were considering reading the analog every second and totalizing that. Most of the flow meter manufacturers have an additional unit that will change the pulse into a 4-20mA. For flow meters with 4-20mA current loop output, Acromags993EN-4016is used. - What type of input card would be needed (micrologix platform)? Also, would the pulse width need to be set above the period of the PLC scan time? I'd say make sure that each pulse takes at least two plc scans. Community Software by Invision Power Services, Inc. so how to get the signal of I0.0 to MD10. Various sensor sizes: 1/2, 1, 2, 3 or 4, 8, 10 inch pulse flow meter, Inline pulse output flow meter with flange, tri-clover, tri-clamp or thread process connection, Electronic pulse meter offers one pulse per unit (gallons and litres). I had an issue where the designer specified the wrong parts that had a 5Volt output, they would work for a while then stop working. You can update your choices at any time in your settings. The E+H Promass 83 has HART communication. I want to measure flow rate. Pulses will give you accurate volume data from which you can estimate flow. The sensor is tested by supplying it with a voltage up to 30 VDC, and it operated as expected. By using this logic, we can calculate total fuel passed from the pipe. When I changed to 200ms, it catched pretty well. Retrieved from Wikipedia: https://en.wikipedia.org/wiki/Flow_measurement, [3] YF-S201 Datasheet. If you're needing accuracy, put in for a HSC card. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); This field is for validation purposes and should be left unchanged. If the analogue is derived from pulses, then it is an average. Press question mark to learn the rest of the keyboard shortcuts. After each revolution of the turbine rotor, the hall effect sensor gives electrical pulses as an output at its terminal. A popular application ofuniversity power plant steam cost calculationsis achieved by sending pulsed outputs from flow meters to the 989EN, with discrete inputs and signal counters configured to totalize/convert to digital data. Some of them will put out 12 pulses per rev of the wheel. I don't know what the frequency of the pulses is. We promise not to spam you. Trouble shooting digital input card on Direct logic 205 PLC, Flow Meters Scaling - Converting Parameters, Currently Active Users Viewing This Thread: 1. Answering this question is not an easy job. All of ours also have the additional control unit from the manufacturer. Use the built-in totalizer on the Promass and read it with your PLC using HART. [2] Flow measurement. We don't use them for flow speed readings. The speed at which the turbine rotates is detected with the aid of another rotational speed measurement device, a hall effect sensor is used in YF-S201. This is new territory for me so I'm just trying to get up to speed by learning the basics. Hsc is the way to go. Some high end meters allow you to adjust the K factor in the meter, the higher end meter input cards also have K factor adjustments. If the pulse value is 100 gal change it to 1000 gal. Each channel A/D is 16-bit high-resolution, with a fast 8mS scanning rate of all 16 channels. Another vague thing is the information about the connection of the YF-S201 sensor, should it be connected to a Sinking or a sourcing input module? Pulse output turbine option with LCD readout or not. Coriolis and some marketers can totalize in the meter and drive a DO to signal when the volumetric is met. For flow meters with pulse output, Acromags989EN-4016transmitters are widely used for I&C, remote monitoring, and sub-metering applications. In AB CompactLogix or ControlLogix you can have an event task that runs when the input goes true, or a fast periodic task, or for a continuous task call the counting routine several times in your main routine. In such a situation, the designer should make sure to purchase a digital module with a hardware counter available to be utilized by the sensors connected channels. Inputs have filtering for on and off time. In the age of energy management for process, manufacturing, and BAS, there is an increasing need for organizations to not only record and manage energy/water usage, but also sub-meter it. Even better, if the connection between the meter and the PLC gets disconnected or whatnot, when it comes backcorrect totalizer. Do you mean on the meter itself? The K factor should be set from the factory. E+H promass 83. CRC Press. I can't say what the cost of a factory matched control unit costs, even though we have replaced several, I haven't seen the paperwork. Hsc is the proper way to do it. Pulsed output flow meters can be integrated into measuring / dispensing systems. Here we consider a flow meter for measuring the fuel with maximum flow rate of 100 liters/hour. A wiring diagram for the YF-S201 is shown in Figure 3; the diagram shows how the sensor is connected to the I/Os of the PLC. If total fuel is greater than 5000 (5000 value is for example purpose, it is depended on flow meter configuration & its range ) then totalizer count should be zero automatically or we can reset by pressing RESET button (I0.0).

Thats what I was thinking. I had ran into the same problem, and I concur that HSC is the way to go, or maybe direct module also might work. Community Software by Invision Power Services, Inc. If the sensors signal frequency range lies within the rated frequency range of the digital input channel, then operating the channel in the normal mode is enough. When a steady rotation speed has been reached, the speed is proportional to fluid velocity [2]. I dont understand that place. This is also the better answer because what the meter's totalizer says and what the PLC's totalizer says, always agree +- 1 gallon or so. Retrieved from hobbytronics: https://www.hobbytronics.co.uk/datasheets/sensors/YF-S201.pdf, To view or add a comment, sign in If the sensor was an on/off sensor (a photoelectric sensor, for example), determining the right sensors connection type would be an easy job using the Avometer test. Never used a pulse output meter with a ML, but I've done lots of applications with SLC's and PLC-5's. The best practice in this situation is to test the sensors connection using a relay. This should be able to be captured by a typical DI input card. You'll thank us in the end. Can the internal totalizer be mapped to a HART variable?? We can solve this problem by simple logic. If anybody has any links that I could read up on that would be great also. I'm sure it varies based mainly on ID of the flowmeter & various other manufacturing specs. Usually a pulse flow meter has open collector NPN output which is configured like a switch to the 0V supply of the flow meter. That significant of a voltage drop on a power supply is indicative of a bad PS or the 24V is shorted to 0V and or ground somewhere. You can configure which to trigger a pulse (for example every .25 kg it .5 kg) and the length the pulse to be on. How to Work with Allen Bradley RsLogix Emulator? The add on controller counts the pulses and sends a discrete singal to the PLC when a set point has been reached. Select Accept to consent or Reject to decline non-essential cookies for this use. MrPLC.com 2022 Reproduction without explicit permission is prohibited. Thus, the choice of the supply voltage depends on the logic 1 voltage level accepted by the PLC digital input channel. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Documentation and Change Control of PLC or DCS Systems, PLC Based Industrial Conveyor Ladder Logic, How to use Masked Move Instruction in PLC, Face Mask Making Machine using PLC and HMI. The PNP and NPN connections should both be investigated, and the right connection is the connection after which the sensors signal wire can provide the adequate current for the relays coil. High speed? The pulse flow meter is a speed flow sensor with high accuracy, good repeatability, simple structure, high pressure, wide measuring range, small volume, light weight and low pressure loss. This sub is dedicated to discussion and questions about Programmable Logic Controllers (PLCs): "an industrial digital computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis. Here we will convert this flow rate from L/H to L/Sec by using DIV instruction for calculation. - What is a K factor, and how is it used in programming? The "K" factor basicly lets the user know how much volume has passeed thru the meter for a given (usually 1) amount of pulses. Customers appreciate the user-friendly built-in web browser configuration software tool, along with the ability to remote in over the internet. The calibration process may be done using a labeled vessel and the number of pulses produced right after filling the vessel with exactly 1 liter should be counted. A turbine flow sensor comprises a turbine rotor, mounted on a shaft within the cylindrical enclosing the liquid stream [1]. Pulse output flow meter can also option with LCD display, Pulse PD flow meter can measure high viscosity liquid, up to 10000 cp, Remote display options for pulse PD flow meter, ADDRESS:No.286 Tongtai Road, Jinhu, Huai'an, Jiangsu Province, China. You'll never have arguments as to which totalizer is correct, because they'll always read effectively the same number. In cases when the sensors signal is changing faster than the CPU cycle, configuring the digital input channel to interrupt the CPU cycle is needed. Our flow meter pulse output is too fast for the PLC to catch all the pulses. Our brand is Accurate Meter. The totalizer will keep track of the pulses its given and even if the pulses dont happen totally in real time, it will always give you the correct number of pulses - eventually. Here clock pulse of 1s (M0.5) will add value every second and store the result in memory word MD22. It could happen that impulses are converted to real values and then added to totalizer. -. Min flow can detect is 0.6 L/h. By using DIV instruction we converted L/H flow into L/sec and final value stored in MD18.

I've been setting our meters to a pulse width of around 10ms and a pulse value of .5 gallons per pulse. Accordingly, the 989EN-4016 is a versatile, value-priced solution for Ethernet 16-channel discrete I/O with counter/timer in the US market. Sign up for a new account in our community. You can also follow us on Facebook and Twitter to receive daily updates. These units take in a frequency signal from a proximity sensor that is sensing gear teeth and convert the rate into a 4-20ma signal. To view or add a comment, sign in. The fluid flow is directly proportional to the number of pulses provided from the hall effect sensor [3]. Free Instrumentation Course for Trainee Engineers, Single Push button to ON and OFF a Bulb using Ladder Logic. Learn more in our Cookie Policy. I've run into meters where that was not an option. Or like everyone else says, get the purpose built HSC which is right in that cards wheelhouse of intended operation modes.

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