how to read data

0_Einstein

When you see yellow in the plc tag editor, your tags have overlapping memory.

Also, I think you meant INT, not DINT.

I believe the load cell AI will read as an INT, not a DINT.  That's 2 bytes, not 4.

Avoid using the same bytes for multiple tags unless you know exactly what you are doing and why. 

MarsEngineer

Hi Denilson,

Do you have a sample project like this in version TIA Portal V15.1? Also, I am having trouble seeing my load cell output. I am trying to read it as a Int and my result is not changing. Thoughts? Thank you. 

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Split from TIP: calibration blocks for ET200SP AI 2xSG 4,6-wire HS module.

 

Dear All, My task is to read data (measure weight) from a SIWAREX WL250 load cell which has an output of 3.0029 mV/V and recommended reference voltage 5...12V DC.

I am using a power supply of 24V and an ET200 SP with a CPU 1512SP-1PN and an AI module AI 2xSG-4-/6wire HS which has a measuring range from +/- 0.5 ... 320 mV/V and is designed for load cell systems as far as I read from the manual, also it says it has a 28 bit (normal/isochronous mode), 16 bits (oversampling)

. I have the load cell connected to the AI module.

I am trying to normalize the value with NORM_X Block with MIN 0 to 27648 and then trying to scale it SCALE_X from 0-1000 (which is the maximum load of the load cell), but I am not getting real data and it is important to mention that I am getting 5/6 as an offset when there is no load applied to the sensor (load cell).

I want to know if I should use an amplifier even though it does not make sense to use an amplifier when my analog module is specifically made for load cell measurements.

Am I using the correct value (27648) for the NORM_X? Can you tell me if I am using the correct measuring system for the load cell and more about how I can get the correct value according to the weight I put on it?

Thank you in advance.

 

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Split from Trouble seeing load cell output..

Closed cause question posted twice.

The second thread with the subject How to read analog values from SIWAREX Load cell WL250 with module AI 2xSG 4-6wire HS is published within the conference Process Instrumentation / Analytics / Weighing Systems SIWAREX.

Best regards,
Jen_Moderator