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sanyc

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  1. I see what you mean Ausman. The resolution is not high enough. The following is what I did and works pretty well. Its drwaback is that at low rpms the pulse width becomes an issue and at very high rpms it will be limited by the increamental step of the timer.
  2. I see what you mean. The thing is my current model Unistream doesn't support interrupts. Please someone enlighten me if I am wrong
  3. I did something similar in Unilogic but I am not getting accurate results. Attached is the program itself. On the first rung I am stacking up an MI that I am assuming its increasing at a rate of 1ms based on the scanning time. On the second rung my proximity pulse clrears the first MI and stores its value to a second MI. Then I am converting my stacked up MI into milliseconds to get the period and converting them to seconds for the final RPM calculation. (RPM = 60/T) My test rig is a motor at steady speed rotating a shaft that I get proximity pulses from. Testing with va
  4. I have looked into the example. Are you based to the fact that the scanning time is 2.5ms for the increment in the subroutine?
  5. I am using the 5'' TA30 unistream. What I did so far was used a normal digital input and calculating how many pulses from the sensor I get for every 2 seconds. Then I am multiplying this value by 30 to get it for every 60 seconds (which is like an instantaneous) reading of the rpms. Will try various methods to see which one best works.
  6. Hi, I am reading pulses from a proximity inductive sensor and I want to convert it to rpms. The rpms are being read from a wind turbine shaft and I am getting one pulse per turn of the shaft. I will have max around 120 rpms. The sensor is omron PNP, NO, 3 wire 24V dc. I am trying to measure the time between the rising edge of each pulse (thus each turn) of the proximity sensor but I am not sure how to do this with the timers. Anyone can help?
  7. Hi, Does anyone know how I can interface the following joystick to a Unistream? Thanks MR Series Specifications.pdf
  8. One thing that bothers me with multiple linearization inputs is that when going online the y1,y2 parameters get the readings from the second AI, no matter what their store blocks command them. Is that because of the scan time of the program and it doesn't have the time to "update" the stored values, so it "shows" the last stored values in them?
  9. Any remedies for this condition?
  10. Thanks Joe. I ll drop them an email. If you also know of a Europe based supplier please let us know.
  11. Does Unitronics offer gearbox with its servo motors for output torque multiplication?
  12. Hi Joe, I dropped the PID in favor to on/off control. Turned out to be much simpler in my application. Also I figured out how to trigger the PWM output with 100% of the cycle time. Thanks for the help
  13. Thanks Joe for the input. So I set up the PWM Output as follows and set my numbers to the SI for the PID. As it is set up now once it reads a pressure drop of less than 30 it uses that number as a setpoint. Something does not trigger the PWM output
  14. Hi, First time I am using PID on a Jazz. I want to keep the pressure within a system steady, regulated by a solenoid valve that has a constant pressure supply on it; and in turn feeds the closed system. Attached are my setup and I have a few questions: 1. My CV is the controlled digital output on the solenoid valve that opens when the pressure drops; reads of a 0-10V pressure sensor; and closes when that pressure reaches my setpoint. How can I setup the CV to a digital output? 2. My Process Value and Setpoint I have them linked to the same MI because I want to keep t
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