Autor Thema: Analogue Input to analogue output mofifier  (Gelesen 3785 mal)

Offline MPL

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Analogue Input to analogue output mofifier
« am: Mai 02, 2013, 16:13:22 Nachmittag »
Ok, I'm new to this ladder logic though have spent many years programming in asm & C.

Easy Model: 822-DC-TC
Requirement: To generate a 0-10v output from two 0-10v inputs

The mechanics of the problem are I have two linked grinders which process a product. As the loading (amps) on these grinders increases (max 65amps each) the output product increases. So therefore to maximise production I want the grinder ampage to remain as close to 65amps as possible. The grinders are fed the raw product via a screw conveyor with an invertor.

What I want is for the inverter screw (0-10v potentiometer) to maintain a constant loading on the grinders of 65 amps. i.e. I want the speed of the screw to increase/decrease thereby maintaining a constant load.

Is this possible?

Thanks,

Offline D.K.

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Re:Analogue Input to analogue output mofifier
« Antwort #1 am: Mai 06, 2013, 22:24:30 Nachmittag »
hi MPL
my english is not so good but I'll try to explain my views programm

first steps  Analog input one and two are Ardiert (AR1)
then they will Dividing by two (AR2)
this value is for the PID controller

I hope I could help

(translated with Google)

« Letzte Änderung: Mai 06, 2013, 22:26:57 Nachmittag von D.K. »

Offline MPL

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Re:Analogue Input to analogue output mofifier
« Antwort #2 am: Mai 08, 2013, 09:06:31 Vormittag »

Thanks for your reply.

Why PID?

Offline D.K.

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Re:Analogue Input to analogue output mofifier
« Antwort #3 am: Mai 08, 2013, 22:05:59 Nachmittag »
hi MPL

I thing
PID is best suited to this
you really only need the component P and the I componentthe
actual value comes from the current transformer,
 the setpoint is stored in the PLCby the controller,
the value of the output side kept as closely as possible to the setpointwith
 friendly greetings
dk

(translated with Google)