BobLfoot

MrPLC Admin
 View profile  See their activity

  • Content count

    4128

  • Joined

  • Last visited

Posts posted by BobLfoot

  1. Posted

    I doubt this will be much help, but AB drives usually have a Status Word, Command Word and Data Links between themselves and the PLC.

    The Powerflex Manuals will describe the Status Word, Command Word and Data Links in detail.  The trick will be to find how in Schneider Memory / Tag Structure the EDS has mapped them.

    The HIM of the drives will also be useful as they will tell you when you have supplied th appropriate Stop/Enable signals to allow the drives to runa t all.

    Speaking of which, have you run the drives from the HIM to confirm you're enables and stops are wired correctly?

    1 person likes this

  2. Posted

    I've done this with covneyors and no encoder just a once per revolution of the driven shaft prox.  So 5 meters might become 500 or 5000 pusles of the sensor.

    Then create an array of length 600 or 6000.  I was usually using DINTS because I had to track more than just good/bad.

    Each prox pulse I check the bad sensor and load position 6000 of the array with a 1 or zero,  After that I COP Array[1] Array[0] moving everything one position.

    A little trail and error tells me that due to rounding errors and such the unload/stop position is actually 98 or 997 not the 10 or 100 I calculated.

    Hope this napkin description makes sense.  I'm sure it can also be adapted to using the encoder values. 

  10. Posted

    Never considered using it as a logic bomb like you were thinking, but when I was a System Integrator years ago and we were testing warehousing systems we'd build a rung that would load negative one into a timer preset when certain conditions where we wanted to examine system physical state visually existed.  the -1 tiimer preset would critical fault the plc.

  11. Posted

     

    On 3/3/2024 at 6:32 PM, BE said:

    Can't tell if the VFD's are the same make and model, so I am making the assumption that the drives are different. 

    Three drives of the same model when purchased in 2012. 

    VFD #0 went to the store room shelf in 2012 and onto the machine when VFD#2 failed in 2022.

    VFD #1 went to the store room shelf in 2012 and is still there. 

    VFD#2 was installed on the machine in 2012 and sent for refurbishment in 2022.

    The refurbishment included a new Control Board, New Fans and New Output Module.

  12. Posted

    So I have Two VFD in my store room, both are Three Phase 480 VAC @ 25 HP drives.

    VFD #1 was bought in 2012 and still has it's factory seal intact.

    VFD #2 was received from the manufacturer as "remanufactured" in 2022 and is still factory sealed also.

    Now the questions?

    1)     Which one would you pull to replace a drive that failed?

    2)     Why did you choose the drive you did?

  13. Posted

    On 2/12/2024 at 3:45 AM, SillyBoy said:

    The Pump is located in a pond in the forest which is 2000 Meters away from the nearest building.

    The pump capacity is 55kW and we are considering 55kW HD VFD as a starter.

    Just thinking out loud.  55KW at 480V is 101A.

    using this calculator --> https://www.southwire.com/calculator-vdrop

    I get the attached wire requirements.

    The ides of a Starter Box near the pond makes sense.

    You might even use a higher voltage feed to the Starter Box, a step down transformer to 480 and a Fiber Run to get network controls at the starter box.

    Would be what I would try.

    southwire.JPG

    1 person likes this

  14. Posted

    Not sure if it still true with the M580s but the older "Legacy" Modicons Scanned each page of logic from top to bottom column by column, while Rockwell Scanned left to right then top to bottom.

    So take the following logic 

         A          B

    ----| |--------()---

         B          C

    ----||--------() --- 

    If A is true and an AB Processor scans this once then both B and C will be true at the end of the scan.

    If A is true and a legacy Modicon Processor scans this once then B will be true, but C false.  Becasue Legacy Modicon scanned Top to Bottom then Left to Right.

    After the second scan both processors will have a,b and C true if A started true.

    Just don't expect to convert the logic and ahve it work, there may be some hiccups along the way.

    1 person likes this

  15. Posted

    9 hours ago, Asrarmeryem said:

    We will be replacing the Rockwell 1783-MS06T with the Schneider M580.

    Last I knew the 1783-MS06T was a 6 port ethernet switch and the Schneider M580 was a PAC Controller.  

    I don't see how one replaces the other.  

    You'll need a switch of some form to connect your  BMENOC0301, your 1734-AENT and a  22-COMM-E in your  22C-D017N103 to have ethernet.

    1 person likes this

  19. Posted

    Cannot comment on your particular Omron, but in the Rockwell world the system call {GSV} to read the Clock takes multiple scans to execute and too many of them can affect performance.  I would check yout instruction help and manuals to see how much overhead the GetTime instruciton loads the system.  Having just one I would wager won't kill anything, but do this for a dozen or more times in a scan as I've seen some "green" programmers do and all bets would be off.

  20. Posted

    7 hours ago, reno said:

    Bonjour Tout le monde.

    Je suis nouveau dans le forum. je travaille dans l'industrie automobile et notamment  sur les PLC mitsubishi.

    Je dois réaliser une communication entre une carte Ethernet  IP "RJ71EIP91 et une  Imprimante ZEBRA. (ZT620)

    Zebra  a validé la communication avec un fichier EDS pour Rockwell.

    (EDS File
    The EtherNet/IP EDS file describes the Identity and I/O capabilities of the printer. The file
    is used by PLC configuration tools to configure the I/O connections and data tags used to
    communicate with the printer over the EtherNet/IP network.
    The EDS file is keyed by Rockwell for EDS AOP usage (a custom Rockwell AOP will be
    available from Zebra or in the latest version of Studio 5000). See Figure 1. The latest EDS
    file can be acquired from the printer directly using RSLinx Classic – RSWho and uploading
    the EDS file from the device.)

     

    Il semblerait que Mitsubishi accepte les fichiers EDS aussi. Je ne connaisais pas cette notion de fichier EDS.

    J'imagine que cela ressemble au principe des fichier GSD de chez Siemens.

    Pensez vous que le fichier EDS développé pour Rockwell soit compatible MITSUBISHI ?

    Tchao

     

    Reno

     

     

    Google Translate told me --

    Hello everybody.

    I am new to the forum. I work in the automotive industry and in particular on Mitsubishi PLCs.

    I need to carry out communication between an IP Ethernet card "RJ71EIP91 and a ZEBRA Printer. (ZT620)

    Zebra validated the communication with an EDS file for Rockwell.

     

    It seems that Mitsubishi accepts EDS files too. I didn't know this concept of an EDS file.

    I imagine that this resembles the principle of GSD files from Siemens.

    Do you think that the EDS file developed for Rockwell is MITSUBISHI compatible?

     

    Pturmel gave you the same asnwer I was going to as I was translating the post.

    Welcome to the forum and hopefully the more Mitsui expert users can offer specific guidance.

    Or from Google Translate

    Pturmel vous a donné la même réponse que j'allais faire pendant que je traduisais le message.

    Bienvenue sur le forum et j'espère que les utilisateurs experts de Mitsui pourront offrir des conseils spécifiques.

     

  24. Posted

    Thought I would post a lesson learned about the 1794-AENT.

    The System Integrator we had working for us had comissioned a number of 1794-AENT units calls that the latest batch won't configure.

    After working back and forth with RA Techconnect it finally turns out that we had been using 1794-AENT firmware 4.1 from our store room and then got into a fresh shipment of 1794-AENT Firmware 4.3's.  The BOOTP/DHCP Tool revision 3.03 we were using needed to be upgraded to 3.05 to configure the 1794-AENT.

    1 person likes this

  25. Posted

    Many EONS ago I worked for a Japanese concern satellite plant in the US.  Was always fun when a local system integrator built a panel and 0V was tied to ground where the Japanese panels all had +24VDC tied to ground.  Every once in a while an electrician would forget which flavor of panel he was in and you'd wind up with both 0V and 24V tied to common ground.  Power Supplies don't really like that case.  LOL