drforsythe

MrPLC Member
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Everything posted by drforsythe

  1. Storage of Various Cables, etc.

    I FINALLY got tired of untangling all of the programming cables I need to use and started bagging them in heavy duty ziploc bags.  I have several bags in my toolbox and their contents are segregated by function (or even frequency of use for some of the oddballs).  I write the name of the technology or type of cable set on each bag and that makes it a lot easier to locate the cables when I need them.  It also keeps them from tangling. I work in a manufacturing facility now, so I keep all cables in a roll around toolbox/workstation.  This would have been helpful when I was on the road and used a roll around case like a doctor's bag.  The same would work for a backpack. Need to carry: screwdrivers, cables, wire strippers, small flashlight, thumb drive, change for the vending machine, phone charging cord and battery pack.  The list could get long...
  2. Multiple Machine Integration

    We use the 1783-NATR in a couple applications.  It is a 1:1 NAT device for up to 32 devices.  The setup is simple and our IT department approves.  
  3. Good call, Joe.  That is common especially in plants with unstable or uneven flooring.  In our plant, a forklift driving by can shift the concrete slabs when it drives over them.  Way back when the building was erected, the contractor was pressured to rush on the concrete installation.  The quick-cure and poor base prep caused some slabs to curl on the corners causing a slight "dishing" in the center of the slabs.  We have to shim the enclosures in some areas to keep them level.  
  4. Does it look like the enclosure was dropped?  How were the holes cut in it (manually using hand tools or boring mill, radial drill, etc.)?  If it was dropped, the hinge or area where the hinge is welded could be damaged.  If someone cut the enclosure on a boring mill, for example, the tool could have crashed the door causing distortion.  Another place it could have been damaged is the fold around the doors.  If they are distorted, they will rub on the door opening.  Regardless, you will need to inspect for the location of the damage and then "help it back into position".  A large enclosure like that typically takes a lot to distort it.  It will take an equal force to move it back.  I have had to use a large mallet in the past to move a door back that was hit by a forklift.  Good luck.
  5. Universal Analog Input Card

    That usually means that the card can take multiple types of analog inputs.  For example, it could take +/- 10VDC, 0-10VDC, 0-20mA, 4-20mA, thermocouple (multiple styles) or RTD.  The card would usually have some hardware configuration (different terminals to select the type of input) and software configuration for scaling.
  6. Control Panel Builder

    Welcome to the forum.  Please include some more details about yourself, your specific experience building panels and if you have pics that would be great.  Where are you located?
  7. Hello.  This topic is not controls-related, but I think I could learn something from the group.  In addition to being an electrical controls engineer, I am a medical first responder for the plant I work in.  It has been suggested that all first responders be easily identifiable by the plant and office staff in case of an emergency.  This request could easily get out of hand- nobody wants to wear a bright green t-shirt to work every day or a hard hat with strobe and light.  My question is this:  Do the first aid response personnel in your places of employment wear or carry anything that helps to identify their role?  If so, please share your experiences and images if you have any.  Silly or comical images are definitely accepted, as they may help to demonstrate what we DON'T want to do.  Thank you and stay healthy and safe!
  8. network parameter fo A3A cpu

    I spent some time this morning looking at your program, but I cannot easily determine the mapping of the network devices to the internal memory devices of the PLC.  It would take some time to study the prints, the physical layout of the machine and the program in order to determine the network map.  That is something I could not do in the time I spent this morning.  I would recommend contacting the original machine builder or contact a Mitsubishi office and ask for someone who is familiar with the A series PLC.  I worked on stuff like this over 20 years ago.  The product has long ago been replaced by new PLCs, networks and software to program it all.  I am sorry I cannot help you.  Best of luck in your search.  
  9. network parameter fo A3A cpu

    Attach it to this thread.  I will do my best.  It has been many years...  
  10. network parameter fo A3A cpu

    That is a good start, but it doesn't state which device(s) are used in the address ranges.  For instance, Melsecnet/mini can be tagged to X, Y, M, D... devices.  Your program should help us determine what devices were used.  
  11. network parameter fo A3A cpu

    I used to work for a company that sold Mitsubishi 20+ years ago and would have to regularly talk my customers through the setup of their Melsecnet networks.  They would upload a program using Medoc from a PLC that was configured with a GPP unit.  The GPP had tables to fill out for the network settings, but Medoc did not.  When they would download back to the PLC CPU, the network settings would be missing. All that being said, the biggest challenge was knowing what memory areas to read from and write to when setting up the mapping the physical inputs and outputs.  Some customers had well-documented prints that showed the real-world I/O and how it related to the virtual I/O.  Others were not so easy, and we would need to study their code for clues.  Do you have any such info?  Do your electrical prints have the information?  Or is your program documented to show which memory locations were used?  
  12. How to make analog signal more stable?

    I am not familiar with your controller, but I would use an averaging, or filter command to reduce the fluctuations.  How much is the 0-10V signal changing?  Looking at your graph, the values on the Y-axis are only changing from a min of 73.07 to a max of 74.2.  That is a difference of 1.13.  That is if I read the scaling correctly.  I am not sure what units the X-Axis units are or how those values correspond to a 0-10V signal.
  13. 1756-EN2F

    Is it possible that the Dell managed switch is only allowing traffic from the original MAC address and not the new one?  
  14. Am I correct in reading that the system will repeat itself " until input X1 has been turned off" ?  If that is the case, then X1 would need to stay on for the entire time in order to set the output.  The sequence would abort and reset if X1 goes off at any time.  Or am I misunderstanding the requirement?
  15. After a power outage, Logix5561 lost the program?

    Please post which firmware is loaded into the CPU.  We had a similar issue with 5561 processors.  I believe we had version 16 installed.  It did not matter if the battery was new or not.  We could not find the source of the error.    We upgraded to a newer level and (knocking on wood) have not had the issue since.  
  16. We use a similar flowmeter from a competitor to E-H.  Instead of pulses, we use the analog 4-20mA output signal.  The analog signal is less prone to interference and lost counts.  Our recent machines communicate with the flowmeters over ethernet/IP & Modbus.
  17. tech connect follow up email

    I always leave feedback.  Most of the time it is positive.  I also leave written feedback whenever given the opportunity.  It allows me to express exactly what I liked and what was good but could use a little more attention.  The simple "Strongly Agree" to "Strongly Disagree" selections don't give opportunity for details.  My company pays a lot of money for the service, so I leave the feedback so they can become better.
  18. Hello All: Our plants are going through some expansion and the forecasts for more business are looking quite nice.  I have been tasked with determining where we stand in regards to available electrical power, chilled water capacity and compressed air availability.  For now, I am going to concentrate on the electrical aspect, but maybe there is a device that could cover all three.  I am looking to monitor the three phase voltage, power, frequency and calculate power factor on at least eight (8) main transformers.  I may decide to monitor to the bus level at a later date.  I would like a system with an OPC server that can serve this data to our OSI PI data collection system.  Regarding the chilled water system, I have four (4) systems to monitor. I would simply monitor set point (which may be manually set), outgoing water flow and temperature and return water flow and temperature. I have two air compressor systems to monitor.  For that, I would simply need pressure. I could always connect the sensors for the chilled water and compressor into a PLC and then connect our OPC server to that device, but for the electrical power, I would like something off the shelf.  Ideally, if I could have one device do all three, that would simplify things. If you have any experience with a device that would work, please share.     Thank you in advance.
  19. Force on the Project

    Monitor the tag database and scroll through the tags.  Look in the Force Mask column for values (0 or 1 for bits or numbers and text for numeric and string tags).  Unforced tags will have blanks in the Force Mask.  Forced tags will show a value in that column.
  20. Upgrading L6 Series to L7 ControlLogix

    I have had difficulties with motion instructions when moving from one processor and FW level and going to another.  I cannot recall the details of the FW level but I think it was 18 to 21.  I would suggest making a copy of your file, then opening that copy in Logix 5000.  Then open the controller properties and change the controller type and FW level.  Once the conversion is complete, you will be able to see if all of the code converted.   If you see 0 errors once the conversion is complete, you should be good.  IF USING MOTION commands, you may still have issues, but you will have to cautiously determine how you will validate the conversion.  On our system, it was obvious.  We couldn't run until we changed some code.  If I remember correctly, it just had to do with timing one of the commands.
  21. I might have screwed RS-232 ports

    If you have double checked your settings and tried the loopback test with no luck, the port is probably gone, as you suspect.  I am not aware of a better test to try.  The loopback test is the base test I always start with.  If that doesn't work, there is usually a physical port issue.
  22. Keyence vision systtem

    Can you post images with notations on them that show what you are inspecting?  A good/pass image and a bad/fail image would also be helpful.  From there, we can look at the images to help solve your problem.  At my facility, we have solved a lot of our lighting issues by using infrared lighting and filters.  This way, ambient light conditions have little to no effect on the process (unless you are directly under a window where the sun rises or sets).  
  23. Interesting article.  I have been looking into the Ignition product recently.  It looks like a good enterprise product, but I am looking for something that is good as a standalone (not on network with server) product.  Anyone have any comments about using it as a replacement for HMI only?  
  24. All: We recently purchased a very inexpensive cutting machine that utilizes an operator interface touchscreen from China. The manufacturer is MCGS and the part number is TPC 7062KX. Do any of you know where I can get the software for this? I have done some web searches, but most of the hits are Chinese websites with no English text option. Any suggestions? Obviously, I can convert to another manufacturer, but the purpose of this machine is R & D, it was low cost to develop a process. The machine is not a long-term solution to our problem, so I don't want to convert at this time. Thanks in advance for any input you may have.
  25. Robot vibration

    There is an important detail that we must all know in order to begin helping:  Is this a new problem on an existing system, or are you just commissioning the unit for the first time?  If it is an existing system and the problem just started, you should look at what could have changed in the mechanical system (such as a loose or damaged coupling, or a change in payload or a program change that modified the speed or acceleration / deceleration).  If you are starting this system up for the first time, then the tuning parameters will need to be changed.  It has been a while since I used Mitsubishi servo drives, but I seem to remember an auto-tuning setting that described the rigidity of the system.  If you have this setting too high, but have a compliant mechanical system, then the motor will make noise at the beginning or end of each move.