Pulse input from flow meter

JIBIN · Nov 4, 2013

I have a rotary flow meter,which will give 5000 pulse/second.I just want to calculate the cumulative flow,,per day flow,flow per hour etc,of three chemicals through the flow meter in litre , Using real time clock in the PLC ,and display them in a HMI. How can it is possible........?

andypot · Nov 4, 2013

Hi Jibin, welcome to the forum.

What model of PLC are you using? You will probably need to take the pulses into a High Speed Counter card.

Eg for Allen Bradley Control Logix http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1756-um007_-en-p.pdf

JIBIN · Nov 4, 2013

Hi Andypot,
I am using a fuji plc, it is having a high speed counter and i am using it, i just want to calculate the flow at different time and store it for future reference.
.

danw · Nov 4, 2013

Deleted, wrong thread.

tomalbright · Nov 4, 2013

You have to know the K-factor of the meter. Raw pulses are useless without a reference point. Usually they are in "so many pulses per gallon, BBL, etc".

The K-factor is usually on the meter, or you may have to contact the factory for a default value.

JIBIN · Nov 5, 2013

Its a TCS 700-20 rotary flow meter which will give 100 pulses per rotation and i am using a motor with 3000 rpm,so totally 5000 pulse/second.Per rotation 3.8 litre flows.I just want to know how to calculate flow in litre for a certain amount of pulses.

JesperMP · Nov 5, 2013

tomalbright just told you how.

Pulse input from flow meter

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