This is a continuation of a previous msg... So I would have an email notification
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Hi....
We'd like to connect some output from a proportional controller to a function generator which
produces a square pulse with variable duty cycle.
The question is what proportional controller to use here and if there is any examples related?
And how to produce this square pulse with a high frequency, while some controllers do not support
any thing more than 1kHz? In addition, if it exceeded this, something wrong happens to the output and disappears?
Thanks in advance
Ray
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and johnsold replied (Special thanks to him)
Ray,
Please be more specific in your description. Proportional controllers usually do not connect to function generators so it is not clear exactly what you are trying to accomplish.
Which parts of your system are hardware and what kind? Which are implemented in LV (which version)? What are the inputs and outputs to both the hardware and software? What frequency range do you need? If you have specific problems with a part of your LV program, posting an example showing the problem is very helpful.
When you say the output disappears, do you mean that the pulses stop? That may simply indicate a 0% or 100% duty cycle.
Many individuals with a wide range of experience monitor this forum and will try to help if we understand what you are trying to do.
Lynn
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Actually we are trying to generate a square wave with variable duty cycle using LV
6.1 and SCB-68 and this duty cycle comes from some PID controller
programmed by LV by reading a voltage from the tachometer feeding back the square
wave generator. We like to connect those using LV .
The frequency we want to use is around 20kHz with 0.7 Volts square wave amp
and what i meant by disappearing is that it has 0 volts (with some noise in mV)
when the duty cycle is ranging from 20-90%
