4-20mA Analog Scaling with y=mx+b Slope Intercept Explained

We are going to explain the y=mx+b slope intercept formula as it relates to scaling 4-20mA signals. PLC inputs rarely scale values directly to a 4-20mA signal. Additionally the 4mA live zero confuses many people when trying to plug a raw analog input into the slope intercept equation of y=mx+b. So we are going to explain what the y, m, x, and b mean. We have explained in previous videos how to connect your 4-20mA analog signal to your PLC input and how to configure your analog modules in Rockwell Automation's Studio 5000 for an Allen Bradley Compactlogix PLC.
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Items used in this video:
PLC Tools SIM-ALP2 Analog Simulator controls.tw/yt-sim-alp2
PLC Trainer controls.tw/yt-plc-trainers
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[@RadDadisRad]

Thanks for your tutorials Tim.

[@TimWilborne]

You are welcome!

[@olivioferreira2418]

I love your channel!❤

[@TimWilborne]

You are so kind!

[@MrWaalkman]

At GM we have our "4-20" devices setup as 3.5 ma - 20.5 ma. The reason being is that various faults with the input can be sent to the PLC as either a 3.5 ma or a 20.5 ma signal. Of course if your input device doesn't provide this feature then it's pointless to accommodate for it. But it would create a fault on a sensor failure for example.

[@TimWilborne]

Yes, one of the lesson in the series I touch on that but I should probably go into detail on that.

[@ayomidewilfred1864]

Does the scaling 4-20mA analog signal requires conversion depending either it is real, bool or any datatype

[@TimWilborne]

BOOL can only be a 0 or a 1 so it is not an analog signal. We talk about REALs vs DINTs at twcontrols.com/lessons/difference-between-a-real-and-integer-numbers-when-rounding

[@saikiranc8950]

Hello sir, Is it possible to migrate a hmi panelview c400 to hmi panelview800 using ccw without changing any tags in perfect manner Please suggest a easy way

[@TimWilborne]

Don't know, I was never a fan of the Panelview Component.

[@bryanludgate5673]

Throw it out. Buy a Maple.

[@elcineyalves2416]

Boa noite eu me chamo Elciney, sou do Brasil, mais precisamente da Amazônia, na verdade eu gostaria de saber se você tem algum curso que você possa me vender de CLP MICRO 850, IHM PV800 e POWER FLEX 525, sendo que esse curso teria que ser voltado ou teria que ser a ihm comando a velocidade do power flex e o clp monitorando todos os dois.

[@TimWilborne]

See links below. twcontrols.com/micro800-connected-components-workbench-lessons twcontrols.com/allen-bradley-panelview-lessons twcontrols.com/ac-drives-and-3-phase-motors

[@isaacsepulveda8411]

hello guys, I need support to configure FGEN function block (reason control)