Problems with Wind sensor and analog input module 16 bit

I am working with a WMT702 Vaisala wind sensor, this gives me reading from 0 to 359 degrees for the wind direction and for the wind speed 0 to 65 m/s.

In the first image, I use the nominal values for the normalization and the scaling but I received wrong readings, for example in the wind direction 410 degrees and in the wind speed 126 m/s. I don’t have an idea why I have these readings because it’s out of scale.

After so many days trying to fix the problem I went with the values in the NORM_X block and it works but, is this something correct to do or the failure can be for another reason?

Thanks in advance for your attention.

My hardware:

S7-1200: CPU 1214C DC/DC/Rly

Analog Input Module: SM 1231 AI4 x HF

Wind sensor: WMT702 (4-2-mA Output)

1. The second scale instruction uses REAL-TO-INT. Should it not be like the first one set to REAL-TO-REAL?
2. Is your card configured to 4-20mA?  (hardware configuration)
   

Hello santi19z,

can you show us

• how do you wire your system
• how do you configure your AI-module

The first configuration is the right one. At Siemens is value of 27648 = 100% = 20 mA.

Please go online and check what for values do you have (input, normed signal, scaled signal)

Your value of 411 degree with configuration 1 show that you have a overflow at your current signal.
Please check your current signal, should be maximum 20 mA and no more.

regards
CaOd

AutoGen_1801304

1. The second scale instruction uses REAL-TO-INT. Should it not be like the first one set to REAL-TO-REAL?
2. Is your card configured to 4-20mA?  (hardware configuration)
   

CaOd

Hello santi19z,

can you show us

• how do you wire your system
• how do you configure your AI-module

The first configuration is the right one. At Siemens is value of 27648 = 100% = 20 mA.

Please go online and check what for values do you have (input, normed signal, scaled signal)

Your value of 411 degree with configuration 1 show that you have a overflow at your current signal.
Please check your current signal, should be maximum 20 mA and no more.

regards
CaOd

According to the sensor manual, I just connect the lines in yellow. And in the Analog Module the same, I don't have and image reference for that but I am confident that the connections are correct. 

The problem is this value doesn't appear always, it's a random value the reading can be 120, 250, 90 degrees and all of a sudden 410. But when I use the second config (32767) the Max value read is 359.

If I have a problem with the overflow, how can I correct that?

Hello,

do you have a overview about the configuration of your sensor?

I read at the manual that there are a lot of possible configurations.
The analog current interface for 4..20 mA show a value from 0..359 degree.

Can you send a wiring diagram of your application and a specification of your sensor (exactly number.
(electrical circuit diagramm also with your PLC)
Which cable do you use for the connection of your sensor?

regards
CaOd