Analog Input Measurement - Current w/ SCALE function

Hello,

I am working with a PLC station S7-1500 [CPU 1511-1] and using an analog input module in order to display the current of my DC power supply.

On the properties of the analog input module, I set the measurement type as Voltage and measuring range +/- 1V.

The range of current I want to display on my power supply is from 0 to 50A and the voltage DC is 24 VDC. I created a function with a SCALE block in order to make the conversion REAL to INT (please see image attached).

I still can’t manage to display the current value, I tried many different approaches and I just can't fix this problem. Can anyone provide me some help with this?

Thanks.

The image was left out. Also can you post the function you created.
Thank you,
billwest

filipefs

Hello,

Ok, so I used the biploar always true on the SCALE block, than I received on my HMI a current of 9,4 A whitihin the limits 0 to 50. so I just made a calculation in order to display the current that my power supply is providing, in the case it was 11,9 A:

X = (50*11,9)/9,4 = 63.3

So I used this value as the higher limit value on the SCALE block and finally the current is syncronized.

Is this the right way? Because so far I have good values.

Thanks for your support.