Let's talk about the control system of electromagnetic flowmeter

Everyone knows that electromagnetic flowmeters are mainly used for the needs of liquid, sewage treatment and other manufacturers, but in this article, I want to talk to you about the control system of electromagnetic flowmeters and what are the essential differences . The batch control system of electromagnetic flowmeter is analyzed and explained. Operation control of electromagnetic flowmeter: the user first uses the AH input control terminal to clear the total control amount (ΣS) [if the switch is kept closed, the control total amount (ΣS) is cleared], at this time, AL is in a high level state ( switch on). If the AH input control terminal inputs a high level (the switch is open), the total amount of control (ΣS) starts to accumulate. When the set value is reached, the AL outputs a low level (the switch is closed) to complete a cycle of control. The electromagnetic flowmeter is equipped with the communication software L-Mag-P-51, and the batch control communication is the dedicated command communication of the single-machine communication. When the total control amount is cleared, the total control time and value start to accumulate, and when the value set by the total control amount is reached, the total control time and value stop. In the alarm function of the instrument, the upper and lower limit alarms only display and have no output function. Electromagnetic flowmeter interface signal: 1. Batch (quantitative) control uses AH and COM input signals. When the two terminals are short-circuited (switch is closed), the total control (ΣS) is cleared, and the response time is 300ms, that is, the user A control signal with a time width greater than 300ms should be given. 2. Batch (quantitative) control uses the AL terminal as the output control signal, and the common terminal of the signal is COM. Electromagnetic flowmeter parameter setting: when the user uses the batch (quantitative) control function, it should be set in the parameter setting. The 'control total value' parameter, the value should be the value of the total control point, and its value can be set to 59999. 'Special explanation , the value 59999 does not represent a single unit value of 59999m3 or 59999L, but represents 59999 significant figures, which are the last five digits of the total control amount ΣS, so users need to pay special attention when setting, and set the value more reasonable. 'When the control total (ΣS) reaches this value, AL outputs a low level. Whether the above content has been able to clearly understand what is the control system of the electromagnetic flowmeter, and where the quality points are reflected. If you have any doubts about this article, please feel free to call for details.

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