analog output

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

Good afternoon kormotec,

your question is a little bit hard to understand you might find it easier translating it from you own language using google translate from what i can gather is that you have two different signals from two inverters and you want them to coinside am i correct?

kormotech

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

 Hello,

If I understood what you said correctly, you want to add the speed of the two VFDs and output the sum to an analog output:

1- You shall scale the analog inputs from the two VFDs to Upper and Lower limit values so that you can have values of speed that can be easily understood

2- You shall add the two VFD Scaled Speed values

3- You  shall Unscale the Sum of the two speed (result of addition) also to Upper and Lower limit values, to be able to output that value to an analog output address

kormotech

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

 hi Kormotech,

simple answer is your AO is depends on how you have coded,

if you want to get correct o/p then divide both inputs by 2 and add both one 

and again i am not sure you got my answer 

VP

Ibrahim Fathy

 

kormotech

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

 Hello,

If I understood what you said correctly, you want to add the speed of the two VFDs and output the sum to an analog output:

1- You shall scale the analog inputs from the two VFDs to Upper and Lower limit values so that you can have values of speed that can be easily understood

2- You shall add the two VFD Scaled Speed values

3- You  shall Unscale the Sum of the two speed (result of addition) also to Upper and Lower limit values, to be able to output that value to an analog output address

 how i must UNSCALE  the result?look programe

Jackcaress

Good afternoon kormotec,

your question is a little bit hard to understand you might find it easier translating it from you own language using google translate from what i can gather is that you have two different signals from two inverters and you want them to coinside am i correct?

 yes. 

kormotech

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

 very difficulty to understand your query,do you need average out put of both input ?

or only output when first input 15mA and second input 10mA ?

viralpatel

 

kormotech

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

 hi Kormotech,

simple answer is your AO is depends on how you have coded,

if you want to get correct o/p then divide both inputs by 2 and add both one 

and again i am not sure you got my answer 

VP

 i dont think ot correct, because if 1st invertor will give 15 mA and second 0ma the value on analog output will be 7.5mA.

ANKURGAMIT

 

kormotech

hello i need help

i have two frequency converter. from thay i take analog signal to my logo 8!

use block mathematic instruction for add one signal to second

and get the result to analog output

how will be result of analog output when first analog input have 15 mA and second 10 mA?

and how it make correct

 very difficulty to understand your query,do you need average out put of both input ?

or only output when first input 15mA and second input 10mA ?

 yes. i wanna in evry moment see the result

You have configured in your program the analog inputs as 4-20mA.
If you have to AI1 15mA, remain of 15mA 11mA yet to calculate.
In AI2 of the 10mA 6mA yet.
If you now converts the current is as follows here:

AI1 = 1000 units / 16mA * 11mA = 687.5 units = 688 units.
AI2 = 1000 units / 16mA * 6 mA = 375 units.

The addition of the two values is 1063 units.

The analog output is limited automatically from 1000 units, which corresponds to either 10V or 20mA.