Vision2014
Member
I am working on an application in which I will need to compare two PNP (or NPN) pulses, each of which coming from light sensors at two separate points on a high speed conveyor.
I need to compare the phase of the two pulses (Boolean AND function), and measure the pulse width resulting from the comparison.
I then need to use the pulse width of the result to trigger an alarm if the width gets too narrow.
The frequency of the pulses is around 100 HZ.
I need a low-cost solution that can send the result to an Allen Bradley PLC currently used in a factory.
I considered using a data aquisition card in a computer, but I think a low cost PLC like the Automation Direct Click series can do this.
I'm an electrical engineer with a background in machine vision systems and photonics, but with very limited experience with PLCs.
Any help on this would be appreciated. Thanks in advance.
I need to compare the phase of the two pulses (Boolean AND function), and measure the pulse width resulting from the comparison.
I then need to use the pulse width of the result to trigger an alarm if the width gets too narrow.
The frequency of the pulses is around 100 HZ.
I need a low-cost solution that can send the result to an Allen Bradley PLC currently used in a factory.
I considered using a data aquisition card in a computer, but I think a low cost PLC like the Automation Direct Click series can do this.
I'm an electrical engineer with a background in machine vision systems and photonics, but with very limited experience with PLCs.
Any help on this would be appreciated. Thanks in advance.