panic mode

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About panic mode

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    Mitsubishi Moderator
  • Birthday 12/15/69

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  • Gender Male
  • Location Mississauga, ON
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  1. Question about chip PLC

    http://www.icstation.com/fx1n-20mr-board-relay-time-delay-module-rs232ttl-p-12012.html
  2. according to message, POU (Program Organization Unit) needed to do implicit checks is missing and need to be added into project. name of missing POU or function is CheckBounds. This is needed when using arrays for example. btw, message is only a warning...
  3. subroutine programme

    you don't have to, it is just a way to structure program. this is called modular programming and allows reusing same code in different parts of program without duplication.  
  4. array and string

    That IS an example in industrial automation. Anything automotive will have label (every component). Another examples would include logging data, part tracking using RFID tags, setting drive parameters, getting data from scale or flow meter or vision system or ECU and many more.   What kind of automation you do?
  5. array and string

    an example is barcode scanner that reads label and sends you back the string. another example is if you want to print label, printer will need information in a form of a string.
  6. Celsius to Fahrenheit

    and would take same or less space than indicator and button
  7. i would expect that candidates have strong theoretical understanding and can explain what goes on and can prove to me they are quick learners. experience is nice but i prefer good attitude and no experience - specially over bad experience. not experienced person can quickly gain experience with a bit of coaching in the workplace (and this gives me a chance to make sure he/she does it the proper way). wrong kind of experience is still experience but... it is bad and dangerous... correcting this requires a lot of un-learning... and i don't have time for that.  actually using VFD is not a perfect substitute for real 3-phases - VFD output is a chopped DC, not a sinewave. This also means you need to at least use TrueRMS multi-meter and know what to expect. anything less is waste of time. if you can get your hands on it, try ganging two motors, one as motor and other as a 3-phase generator. this can also be very small or low power for those willing to experiment.   things that bug me is candidates that waste my time. that includes people that: - don't understand social effects of (not using) shower, laundry and personal hygiene (you would not believe how many people show up with BO, greasy hair etc.). this is what makes meetings VERY short... - cannot read and write. knowing alphabet and ability to communicate verbally is only the most rudimentary skill set. i still need to see handwriting, basic algebra, basic computer skills, critical thinking etc. (yes, give them small word problem and see how they do, my 15 year old son is doing that in school and he is good at it, adult should be able to at least match it). if i cannot EASILY read their notes, i cannot have them complete service reports, note down reasons why equipment is locked down etc. if someone failed to learn how to read and write in 12+ years of schooling, they came to a wrong place to ask for another chance, i am not that good of a mentor. - send resumes without proofreading them. when they type it, word processor tells if there is a spelling mistake. demonstrate that you know how to use it before you email that resume. and i specially love it when they state great communication skills but use inappropriate language, terminology or mess up resume. - don't understand electric power but want job that requires knowing it. those who cannot explain difference between P=V*I, P=V*I*cos(phi) and P=V*I*cos(phi)*1.73 need not apply... - don't understand Ohms or Kirchhoff's Laws or how multi-meter behaves in a circuit. easily tested on paper by drawing mixed circuit of various meters and a power source. i may also throw in resistor just to give them some hope.  - don't understand operation of transformer and voltage divider   That would be just a set of "no nonsense" checks to weed out 95% of "candidates". real interview starts after this...    
  8. ASCII !@#$!@#(*&^

    "27" is two bytes or characters or SINT. "2" = 0x32 = 3x16+2 = 50 decimal "7" = 0x37 = 3x16+7 = 55 decimal  
  9. I am sorry and I apologize... Another moderator informed me that that was link to updates only and that those are free... Your status is restored and warning is removed.

     

     

     

  10. incremental encoder missing counts

    as Joe stated, can you verify actual length of cut pieces and confirm if there is an error or not? if there is an error, then troubleshooting is needed (shielding, configuration,..) 
  11. CP1E Analog input connection and programming

    do you know what a potentiometer is? you MUST connect all three terminals. brown wire is positive blue wire is negative yellow wire is analog output...   
  12. CP1E Analog input connection and programming

    that is not LVDT, it is a linear potentiometer...  read datasheet, it tells that max current through it is 10mA which will be no problem if you power it by 10VDC source. then you can use its output directly although that is not recommended. max wiper current is recommended to be less than 0.1uA. Ohms law states R=V/I = 10V/0.1uA = 100MOhm. No analog input on PLC has such high impedance. Usually they have 0.1-1MOhm. To properly use such device one would need buffer of some sort (voltage follower) with high input impedance.    
  13. HC-SRO4 an arduino Sensor

    No PLC can use this kind of sensor directly.   This type of sensor requires controller to initiate measurement and capture echo with very precise timing - something PLCs simply cant do (need I/O that respond within micro seconds). You can use microcontroller and convert signals to something PLC can read or - choose an industrial sensor with output that is compatible with PLCs (this is simple to interface  but it will cost hundreds of $). https://cdn.sparkfun.com/datasheets/Sensors/Proximity/HCSR04.pdf if you are on a budget, just throw in Arduino as a converter... you can transmit signal to PLC in different forms (analog, serial, parallel).   Btw. ultrasound sensors have some peculiarities, cannot use more than one at a same time (syncing required), sensing field is conical (pretty wide) so target need to be reasonably large and reflect sound, sloped surfaces work as mirrors and deflect beam in another direction, one does not see what exactly sensor is looking at etc. Where possible (99.9% of times) lasers work better. Some low cost industrial distance sensor is for example O1D100 (should be 2-3 times cheaper than ultrasonic).  
  14. Hi Friend,

    Do you haveany idea of how to create queue in mitsubishi PLC?

    Regards,

    Mani

  15. MR J4 CAN NOT JOGING

    yep... we all have been there... anyway, this is not plug and play... what commissioning steps have been completed? message suggests to check mains power. what messages servo drive reports? is everything connected correctly (motor, encoder, over-travel switches,...) and configured (motor type, gear ratio etc.)?