PLUS+1 User Forum

PLUS+1 Hardware => Controllers => Topic started by: pinias on November 09, 2010, 03:56:25 PM

Title: FREQUENCY MEASURE
Post by: pinias on November 09, 2010, 03:56:25 PM
Hello All,

Does any one have used the frequency input pin of the MC050-10 controller? had it worked?  I have tryied to connect a magnetic pick up sensor. the sensor is sending a sine wave form 30 mV peak to peak however the controller does not pick up the signal.

according witht he technical specification pin/out of the controller it should work. I may be doing something wrong in the pin configuration.


Thanks ::)
Title: Re: FREQUENCY MEASURE
Post by: Stefan on November 09, 2010, 04:39:57 PM
Hello,

Your sensor has to send a voltage that varies between 0 and 30 mV otherwise it's not possible for the input to register it.

With PinConfig1 set to 1 the threshold should match, according to the API specification for the controller. You find the API specification in the Hardware file for the controller.

This is the thresholds for PinConfig1 = 1:

Rising Min/Max 0,191V/0.279V
Falling Min/Max 0.067V/0.187V

Stefan
Title: Re: FREQUENCY MEASURE
Post by: pinias on November 11, 2010, 11:34:03 PM
Does it matter if it is a sine wave form?

Regards
Title: Re: FREQUENCY MEASURE
Post by: Stefan on January 31, 2011, 10:37:22 AM
Hello,

Sorry for the late answer.

No, it doesn't matter.

Best regards
Stefan
Title: Re: FREQUENCY MEASURE
Post by: pinias on February 03, 2015, 10:19:31 PM
Hello Stefan,


look, I need to get clutch RPMS, so I installed a KKPG16708 PICK UP SENSOR.  I am using a MC050-10 controller and I am using PIN 18 for inpit of the pick up sensor.

the picture attached shows the pin config and the way the freq to rpm block is connected. I understand in thsi way it should work or I should be able to read RPM, however I read nothing.

what could I be doing wrong?

My system is 24VDC.

this is the fisrt time I am using a pick up with the PLUS 1 so no too much idea what could be wrong int he firmware.

I have tried other advises posted in this fórum but so far no luck

I appreciate any feedback on this

Thanks
Title: Re: FREQUENCY MEASURE
Post by: Jakob on February 04, 2015, 10:31:54 AM
Hi Pinias

Try setting PinConfig1 = 0.

It worked for me.
Title: Re: FREQUENCY MEASURE
Post by: pinias on February 04, 2015, 08:51:09 PM
Jakob,

I have tried with piconfig1=0, but it does not work

my system is running at 24V. I have also tried the KKPG14708 for 5VDC sensor power supply but same thing it does not read any thing.

I split the output of the freq to rpm block into 4 U8 variables so that I can put the information in a CAN message (cause the output is U32)

I do check with the Canking in order to be sure the message is there and yes it is there but it always has 0 in the 4 arrays.

what pick up sensor have you used in your application?

I appreciate any advise

Thanks
Title: Re: FREQUENCY MEASURE
Post by: Jakob on February 05, 2015, 09:01:28 AM
Ok.
I used the KPPG156, which is uses a 4.5 to 8.5 V supply, and connected it to one of the quad-count inputs.

Have you had an oscilloscope connected to the sensor output?
Because the controller should at least register something.

Title: Re: FREQUENCY MEASURE
Post by: oiltronic on February 19, 2015, 12:47:21 AM
pinias: if you can, move your system very slowly to trigger the sensor then:
What frequency range are you expecting?
Title: Re: FREQUENCY MEASURE
Post by: bgtwuk on March 06, 2015, 01:22:34 AM
Hi Gents

I have used many sensors to monitor rpm or ground speed, with no issues.

However, I had one sensor sent me by a OEM with no specification available.

I put a very small electrolytic capacitor in series with it, omg that did it.  Been a year still working and allowing smooth shifting.

Bgtwuk
Title: Re: FREQUENCY MEASURE
Post by: pinias on March 26, 2015, 03:46:50 PM
thaks all for the advices.

I found out that the pump did not come with the speed ring (lol  :o).

so we decided not to use it...

thanks again