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Recent content by josedavidch

  1. josedavidch

    MACHINE COLOR CABLE CODE STANDARD

    I found this at http://control.com/thread/1026163003 "In Europe control panels I have seen this standard. 1. Power - Black 2. Neutral - Light blue 3. Protection - green-yellow 4. Control volts 220V Ac-Red 5. Control Volts 24V AC-Red 6. Control Volts 24 V DC- dark blue 7. Analog Input - White...
  2. josedavidch

    MACHINE COLOR CABLE CODE STANDARD

    Hello, I have been reading about color codes for machines control enclosure. I would like to get a better idea using a new post and getting as much info as possible. In the last 10 years, I have been using a color standard I learned since I start working on automation on my first employment...
  3. josedavidch

    LAND LINE TO VOIP

    Thanks for reply. What I want is to connect my regular fix lines to a device capable of wireslessly route/connect to phone devices, either IP phones or regular ones thru a voip gateway The whole idea is to install a wireless phone network without use Voip service but regular phone lines.
  4. josedavidch

    LAND LINE TO VOIP

    Hello all, I have just recently moved to a new facility where there is no land line instalation on the different areas of offices. I am wondering if that worst to do the wiring to every spot I need an analog line or instead, invest in a wireless phone system where I can use the lines I own from...
  5. josedavidch

    Temperature Transmitter linearity

    Xnuke, I managed to use a the same fluke simulator on DC mA mode to input 4-20 mA to my PLC Analog in module. Results works perfect when scaled to 0-500F, therefore, the module is working just fine. Did you have any chance to check your correction formula yet? Later on, I will chat you on the...
  6. josedavidch

    Temperature Transmitter linearity

    Xnuke, I will perform a test using a calibrated mA source just to make sure PLC input is working correctly and linear throught the entire range, unfortunately, tomorrow is holiday here and no equipment will be available to me, but I will still be working on this to have it done for official...
  7. josedavidch

    Temperature Transmitter linearity

    Xnuke, I have run the entire range using a Fluke 477 simulator. Attached my finding: we are running about 7 degree above the standard. Without correction, the error is about 7F below standard. Looks like we need something in...
  8. josedavidch

    Temperature Transmitter linearity

    Xnuke, Looks that I let my soul get happy to fast... On the corrected counts value, the formula is retorning the correct values, however, the PLC input raw value is a bit high when compared to theoretical values shown on the table. Ie. for 200F, corrected value is 1638, and Actual count, as per...
  9. josedavidch

    Temperature Transmitter linearity

    Xnuke, I have been testing the new values and so far so good. I will be testing it over more point on the entire range as soon as I get a simulator, because using the real temp from oven does not allow me test the lower and high-uper ones. The simulator will tell me the real truth, however, let...
  10. josedavidch

    Temperature Transmitter linearity

    IRStuff, File was provided kindly by Xnuke based on what I using here. File is located at http://files.engineering.com/getfile.aspx?folder=9e5bfb6b-30a9-4bfb-810b-e5 Application: this is a forced convection oven previously running with a PartLow +1400 temperature controller. The project is...
  11. josedavidch

    PID BLOCK sampling time on AB PLC

    Thanks Francis, I found my perfect sampling already. I also experimented that too fast normally does not affect the performance of the process but could be a waster of resources (as the note you referenced states). However, too slow will dramatically affect the process trend. I also found this...
  12. josedavidch

    Temperature Transmitter linearity

    Thanks Xnuke, IRStuff Xnuke You certainly correct, I am working on the 0-500F, however, the Excel file I download stars on the 32F (= 0C) and that is why I am wondering how to make it run on the range we have set the application for. Would you please check the file and let me know if that is a...
  13. josedavidch

    Temperature Transmitter linearity

    Great... So it will be a matter to use a math function such as CPT to process the input channel (N17:1) and convert the input raw bcd to a corrected value of it. Since I am using 0F to 500F, I guess I also need to use the formula from -200C to 0C in order to perform the scale below 0C and use...
  14. josedavidch

    Temperature Transmitter linearity

    Thank you... I will kick out these kind of components on next projects..for now, this is a hard learning. I opened the table and I am not quite sure how to proceed as far as use an automated formula to covers the entire range. Is it how it works?. I will read about the related topic and this...
  15. josedavidch

    Temperature Transmitter linearity

    Hi all, I have a PLC reading a thermocouple transmitter in the range of 4-20mA for a temperature range of 0°F to 500°F. After I calibrate zero and span to match 0°F = 4mA and 500°F = 20mA, I found that there is no linearity at all on such devices, drifting almost 8°F down on midscale when...
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