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Collecting and interpretting data in Labview

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Yeah, State Machines are so quick and easy in LabVIEW they definitely have their place.  I was hoping to leave them behind though when the company I was working for finally got an NI Enterprise agreement and hired an NI Alliance partner (Bloomy Controls) to come in and help upgrade all our production code to Actor Framework.  Of course once everything was running smoothly they laid me off.  Smiley Frustrated  Now I'm starting all over again at a place that wonders why I can't just continue to use the LabVIEW 8.5 license they already paid for. Smiley Indifferent  Maybe I should just retire...

LabVIEW Pro Dev & Measurement Studio Pro (VS Pro) 2019
Message 11 of 35
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@NIquist wrote:

Maybe I should just retire...


Or apply for a job at Bloomy controls?

Message 12 of 35
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Thanks for your all attention. Firstly, i can give you some details about machine which is at work place. (This is not school project, but also important for work.) 

 

The machine has a temperature and vacuum sensor.  I will read the measured values of the vacuum sensor. I can share sensor operating manual with you. INFICON_MPG400_Instruction_Manual.pdf

 

I should connect the sensor cable to my computer containing LabView instead to the gauge and the controller. How to follow steps for this sensor data in Labview?

 

 

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Message 13 of 35
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That PDF is just a technical specification.

 

You'd need a serial communication protocol for starters. The LV part then is to make a driver implementing this protocol.

 

The protocol manual would look like this one, but then for your device. I'm not sure where to find it. Sometimes it's not open, as manufacturers want you to use their software...

 

A starting point could be (just a wild guess) this Inficon LabVIEW driver. It could be completely different, but often they invest in one protocol, and change only the specifics. EDIT: This could be GPIB or something else. Google Inficon LabVIEW driver, or search the NI site. Not sure, but you might find a good starting point.

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Message 14 of 35
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So page 11 describes the wiring necessary for connecting to a different controller, but to do that you need a power supply (pins 1,2) and seemingly an analog input measurement (3 and 5) connected to a FCC68 connector. Is this really what you want to do?

In that case, appendix A gives the conversion between voltage and pressure in various units.

You can do this in LabVIEW if you have some analog input DAQ device and then you use some simple mathematics nodes to implement the conversion.

If you do this, the other pins can be used to get additional information - pin 6 is essentially 'digital' and tells you if the "cold cathode" is ignited, whatever that means for your measurement (I didn't study the manual more closely). However, don't wire this to a digital input - it will match the power supply level when high (15-30V) which will probably not play nice with most NI DAQ DI levels (typically 5V or 3.3V). There are a few that allow 24V inputs, which you could use, but they aren't the common ones.

 

Previously you've been discussing trying to communicate with presumably the manufacturer's controller via an RS232 hub, in which case as was already mentioned you need a communications manual for the controller rather than the technical specifications of the sensor. If you want to do that, please provide the communications manual as described by Wiebe.


GCentral
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Message 15 of 35
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Of course the first step would be to get it working with supplier software, if it's provided.

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Message 16 of 35
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@cbutcher wrote:

 Is this really what you want to do?

 


I want to share a picture with you about what is I want to do. Sensor data is controlled by Inficon VGC501. You an see a .vi project. I want to show only Vacuum Level on Labview for my first step. So, i should create a new project for data measurement and communicate with vacuum sensor.

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Message 17 of 35
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Hello, bestecf,

 

Could you explain a little bit more about what you want to do? It seems that you can see the same value of vacuum level in the software and the Inficon VGC501. If you only want to have the Vacuum Level indicator, you can take the part of the code that takes this measurement and paste it in a new VI. 

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Message 18 of 35
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@cafedelao wrote:

Hello, bestecf,

 

Could you explain a little bit more about what you want to do? It seems that you can see the same value of vacuum level in the software and the Inficon VGC501. If you only want to have the Vacuum Level indicator, you can take the part of the code that takes this measurement and paste it in a new VI. 


I have a system. This system displays the vacuum measurements on both the display (Inficon VGC501) and the labview front panel. The front panel that is created by software developer is running when exe file runs on a computer. I want to disconnect this computer (exe file) and connect my own computer which has front panel of my vi project . So I want to see vacuum data in the .vi project that I created myself. 

 

 

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Message 19 of 35
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In short, you want to read the device, like the shipped software?

 

You need a driver... So you need to contact someone that made it, or make it yourself. You'd need the communication manual to do the latter.

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Message 20 of 35
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