CraigStares Posted May 9, 2006 Report Posted May 9, 2006 Does anyone know how to use the APU300 module to measure a RPM with the use of a magnetic pickup. I have used the A-B modules for this application and they work great but this is the 1st time I have used this GE 90-30 module and I am having some trouble getting info from the user manual on how this is achieved. Basically I need to measure the pulses from the Magnetic pickup and convert the fequency to RPM with the use of the down sample factor (pulses per revolution of the flywheel). I would realy apprieciate any help. Thanks! Quote
RussB Posted May 9, 2006 Report Posted May 9, 2006 (edited) Yes, By entering the correct number in the "Time Base" configuration paramater... The number of milliseconds for which the counter counts input pulses and returns the number of counts detected during that time to a 16-bit register. If the number of counts detected is greater than 65535, the 16-bit register overflows. Select a timebase small enough to prevent overflow. Valid range: 0 through 65535. Default: 1000. Or: For each counter, the timebase represents a span of time which can be used to measure the rate of counting. For example, the program may be required to monitor the number of count pulses which are occurring every 30 seconds. The Data Register that holds the results will be the 2nd, 3rd, 4th, or 5th of the %AI assigned to the HSC module. This is dependant on the type of counter configured, A, B, or C. More detail can be found in GFK-0293 HSC manual. HTH Edited May 9, 2006 by RussB Quote
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