Ask you prawns, my brother has just entered the field of industrial control. I see a device connected with a pressure sensor of Honeywell, analog value to the SIEMENS CPU after converted to digital, why then square, divided by 1500, plus 138, multiplied by a number, and what the root. I know these things in order to convert the analog values to actual pressures. I would like to ask you how these are divided by the square, plus, and so forth. Thank you. Little brother is not.
Can you take a program to see the general conversion 4-20mA, corresponding to 0-27648 calculation conversion, as you say, I think it is technically necessary to calculate it ~!
I think so. The normal conversion doesn't need it. Maybe you joined PID
PID is certainly good for analog quantities, but it can also be calculated in terms of formulas. Take an example of S7200. If 4-20mA is entered, the value of the PLC corresponding to the readout is 6400-32000, and if it is 0-10V, the corresponding value is 0-32000. In these values into the corresponding pressure value to add, subtract, multiply and divide. A formula: Ov = [S7200 (Osh - Osl) * (Iv - Isl) / (Ish - Isl)] + Osl, including: low limit high limit Osl: conversion results Ov: conversion results Iv: object Osh: conversion of the conversion results of the low limit high limit Isl: Ish: conversion object conversion object
