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About drforsythe

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  • Gender Male
  • Location Metro Detroit Area, Michigan
  • Country United States

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  1. Starting my career

    If you can get a job in maintenance while you are working on your degree, it will show your employer and other potential employers you can manage work and school at the same time.  It can also show them you are willing to start in a position that will help you be a better engineer.  It will also give you a great perspective from the maintenance side of things.  Sometimes the biggest challenge is getting your foot in the door.  If you are a dedicated, intelligent, hard working person who is not afraid to take on new things, it will get noticed.  The big thing that could hinder you is if travel is an absolute requirement of the job.  Best of luck to you.
  2. 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.
  3. 1756-EN2F

    Is it possible that the Dell managed switch is only allowing traffic from the original MAC address and not the new one?  
  4. 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?
  5. 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.  
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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).  
  12. 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?  
  13. 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.
  14. micrologix1100 explict message for power flex 525

    Please post a screen shot of the MSG block.
  15. can we control LN298 motor driver with PLC?

    The L298N is an integrated circuit, so a lot of us on this site are not going to be familiar with their use.  If possible, it is best to attach a specification sheet to help us help you.  A quick search shows that the L298N is a device that takes TTL inputs and drives inductive loads such as solenoids, relays and stepper motors.  That being said, the Q Series has output cards that produce TTL levels.  The manuals are available online.