Re: [foxboro] CONVERTING PULSES TO SPEED
- From: Ken Heywood <KHeywood@xxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Sat, 20 Apr 2013 11:40:57 +0000
Then you need to setup some kind of time standard (either an external counter
or an internal timer) and count the pulses between the teeth transitions. That
will give you period and you can calculate the rotational speed from that.
Thank You,
Ken Heywood
Calibration Laboratory Manager
PROCESS CONTROL SERVICES, INC.
Established in 1983
http://www.processcontrolservices.com
mailto:KHeywood@xxxxxxxxxxxxxxxxxxxxxxxxxx
Telephone: 734-453-0620
Wireless: 508-241-2040
===============================================
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of RAKESH DASH
Sent: Saturday, April 20, 2013 7:35 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] CONVERTING PULSES TO SPEED
I tried what was suggested by all of you but in vain. The pulse speed is too
slow. Its 1 pulse in 3 seconds.
The total teeth is 20 and speed is 1.2 rpm.
Any other way... Create logi, calculation etc..
Stuck now.. Help...
Regards,
- Rakesh
On Tue, Dec 4, 2012 at 6:41 PM, Lingley, Jason
<Jason.Lingley@xxxxxxxxxxxx>wrote:
> The AIN block itself has the MTRF (Meter Factor) parameter. I have
> used this for input from turbine speed probes. To calculate your
> MTRF, use the following example.
>
> SPEED RANGE: 0 TO 4500 RPM
> # OF TEETH ON GEAR WHEEL: 80
> METER FACTOR (MTRF) CONVERTS PULSES/SEC TO RPM
> MAX PULSES/SEC: 80 PULSES/REV * 4500 REV/MIN * 1MIN/60 SEC = 6000
> PULSES/SEC
> RPM = MTRF * PULSES/SEC
> MTRF = MAX RPM / MAX PULSES/SEC = 4500 / 6000 MTRF = 0.75
>
>
>
>
> Jason Lingley
> Senior Application Engineer
> 33 Commercial Street, C42-2C
> Foxboro, MA 02035 USA
> T - (508) 549 - 3707
> F - (508) 549 - 4330
> E - jason.lingley@xxxxxxxxxxxx
> iom.invensys.com
>
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On Behalf Of René Morales H.
> Sent: Tuesday, December 04, 2012 7:55 AM
> To: foxboro@xxxxxxxxxxxxx
> Subject: Re: [foxboro] CONVERTING PULSES TO SPEED
>
> Try with the ACCUM block. The MTRF (Meter Factor) parameter could be used
> to
> do this kind of conversion.
>
> Regards,
>
> René
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On
> Behalf Of RAKESH DASH
> Sent: Monday, December 03, 2012 6:32 AM
> To: foxboro@xxxxxxxxxxxxx
> Subject: [foxboro] CONVERTING PULSES TO SPEED
>
> Hi,
> I have pulse input module FBM206 where pulses from proximeter probe is
> terminated.
> 30 pulse = 1 revolution
> So if I receive 30 pulses in 1 min = 1 rpm Similarly If i receive 60 pulses
> in 1 min = 2 rpm.
> In IACC how can I convert these pulses to rpm. Do i need to write logic or
> there is any direct method ?
> Please help.
>
> Regards,
> - Rakesh
>
>
>
>
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> Systems (formerly The Foxboro Company). Use the info you obtain here at
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_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
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