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Found 122 results

  1. Logix 5000, Array filling

    Hi there! I have a question with AB PLC. My problem:  I have some raw data...distance for example.When the machine starts,the sensor begins to send the information with the distance values. When data is received it is moved into an array. After the first 5 values the program calculates an average and the result is moved into another array.Currently after receiving the fifth value,thus filling the first array,making the calculation and sending the average to the other array,the program empties the entire first array instead of just always discarding the oldest value of the five,and recalculating the average with the newly arrived value every time. I tried to made this with ladder diagram using an an fifo load and unload but isnt working. Please help me if anybody can. Thank You.
  2. Ladder Display Format Change

    My program has the option Tool | Options | Program Editor | Ladder | Ladder Diagram Display Format set to 11 Contacts.  Are there any repercussions to changing this on an existing program?  I would like to spread it out to the 17 Contact setting.
  3. FX2N & Inverter iG5A on RS485

    Hello everyone, I'm a beginner in RS485 communications and i want to control 2 inverter LS iG5A via RS485 from a PLC Mitsubishi FX2N I really don't understand how i should aproach and start this part of program in Ladder Diagram, to write and read parameters from Inverters.  Please help me with an example    Thanks.
  4. Structured Ladder

    Need Help! I uploaded structured ladder program into FX3S PLC. But When I try to read it from PLC it says the program cannot be opened. 
  5. Profibus Function Blocks for Q2ASCPU for Melsec ST Lite RIO inter-connection. Please assist in advising the attainment of such blocks - if any existing. Thanks
  6. RSLogix500 Ladder Problem

    Ok, so I have 22 bits that I need to monitor the status of; all in separate words. Each change of state (on each bit) I need to trigger a timer and have the timer done to completion. I'd like to have the timer reset if a bit changes state during timing. I'd like to keep it to one timer. I'd like to keep things as simple as possible so the less rungs / branches the better. Any help?
  7. Hi, I'm working in so machine basic v1.5 and I'm wondering if it is possible to change the start time and stop time in a schedule block with a %MW. So is there a possibility to for example say %CH0.??? := %MW5 in an operation block? And is there a page where u can see al the possible codes. I already discovered that %TM0.P changes its preset but i don't find a list of al those possibility's.
  8. Hi Everyone, I'm working on my first PLC program and I have gotten my hands on some ladder logic I'm trying to duplicate. I'm using SoMachine 4.1 and have started a new Ladder Logic diagram POU. I'm curious on how do I create internal contacts. EXAMPLE: 24v--------l START BUTTON l----------------( COIL A)----- --------------l COIL A CONTACT 1; attached to a real output, solenoid valvel-------------l COIL A INTERNAL CONTACT TO CLOSE l---------------- Are there standards for numbering and labeling? I'm seeing L and U inside coil contacts. Does this have an underlying meaning according to standard? Is there a RTO function inside SoMachine 4.1    
  9. Hi everyone, I'm a newbie in the ladder logic programming languages. For my thesis project I've to develop a scenario but I'm stuck with the creation of a socket connection from the Modicon M340 PLC to a server for transfer continuous data given from sensors or similar. Does anyone have a sample program that could have such a functionality so that I can change it based on my needs? Thanks in advice for any further reply!
  10. Hi All, I'm still quite new to Unity and Modicon PLCs. I have a PLC program running in simulation mode for development/test and I'd like to follow the logic inside a running block. I can't seem to just double click the function block while online to see it's 'inside' logic. Is there a way to inspect the inside of a running function block? How can I check and diagnose the logic a running function block? Thanks!
  11. ESATR / EGATR Commands

    Good morning folks, I've browsed this forum often enough over the past few years that I think it's time I finally signed up.  Lots of good ideas and advice that I've benefited from and I hope to return the favour some day. So on to my question.... I'm currently knee deep in a project using a CJ2M PLC and I have to send and receive chunks of data over Ethernet/IP.  To do this, I'm using the ESATR and EGATR commands (set / get attribute).  I would like to know if these commands finish execution (ie. the ethernet port completes the transaction) even if the input conditions to the command are no longer true.  Specifically, if I use the "port ready" system flag (A202.00 is an input to my FB in this case) as a condition to trigger the ESATR command, this bit will go low once the port becomes busy (ie. during execution).  So will that interrupt the completion of the ESATR command resulting in an incomplete transaction and data loss?  I've looked through the help files on the command but don't get a clear picture of how it behaves. Perhaps the attached JPEG shows more clearly what I mean. Thanks, PC
  12. Problem failed to start ladder engine

    Hello my brother and sister at this forum, please help me, my problem is after i make ladder diagram and iam click button simulation -> Work online simulator ( CTRL + SHIFT + W ) then appear warning  "failed to start ladder engine", what a problem?? thanks before
  13. Hello, I am currently working on programming my first sortation system.  Attached is a blue print of the in feed conveyors and their loadout lines.  As boxes merge together they will be scanned by the barcode scanner.  From there we will be told which lane each box must go down, from the WCS.   My question is, without encoders, what would be the best way to control this system? Counting the packages as they pass through the photoeye? Or setting timers?   Thanks, James Sorting Conveyor Layout.pdf
  14. Starting Problem with FX2N-2LC

    Dear Experts, I have been trying to activate FX2N-2LC temperature control block but nothing could help. I have tried the ladder logic which is available in Mitsubishi manual but this is not any output from the module. Please help me or guide me to get rid over this problem, I am attaching the ladder diagram so you guys will get the Idea to where I am going wrong.   FX2N-2L Program.pdf
  15. I hate to start a new topic on such an old processor but I forced to keep this thing working until I can upgrade it.  We are having funny issues with outputs.  At first they were on a PLC5/60.  We suspected a bad processor so we changed to a PLC5/40 we had in our tool crib and the problem didn't go away.  Some of our outputs in the ladder are being evaluated to true but not turning on.  We can force the output on and it will come on and when we remove the force it will turn back off.  I've never seen this problem before on any processor.  All the logic leading up to the output is true but the output is not turning on and is there not green. I've already checked all the obvious causes.  The instruction is an OTE.  The output is not duplicated somewhere else in the logic that is turning it off.  The ladder file is being scanned.  I replaced the output with a B3 bit and on the next line had the B3 bit turn on the ouput.  The B3 output bit turned on but the output did not.  This output is on a remote I/O rack and other outputs on that rack are working. Any ideas would be greatly appreciated.
  16. PLC SIMULATORS (LADDER LOGIC)

    CAN SOMEONE PLEASE SUGGEST ME ONE OF THE BEST ONLINE LADDER LOGIC SIMULATOR OR SIMULATOR SOFTWARE FOR PRACTICING AND DEVELOPING LADDER LOGIC SKILLS.??
  17. Hi, can you help me how to make program indirect address for plc omron? I use PLC CP1E Thanks
  18. Version 1.0.0

    451 downloads

    This is a very simple ladder program that shows the basic steps to enable, zero and move a 1S servo using the NJ controller.
  19. View File Basic Servo Control Code for NJ and 1S This is a very simple ladder program that shows the basic steps to enable, zero and move a 1S servo using the NJ controller. Submitter Michael Walsh Submitted 02/10/17 Category PLC Sample Code
  20. Can Anyone Come Up with the Screen Shots or a video link of procedure for Displaying Real Time Sinusoidal Waveforms From Satec MFM ON GE FANUC?? I have PACsystem RX3i via Serial Communications Module-IC695CMM002 
  21. can you help me? bring me some example to build function block program with Gx Works? I use Q02U CPU   thanks
  22. where are the FB libraries

    Hello, Im looking for the in built function blocks, but i cannot find it in the program files/ omron folder where the manual says (even with search for *.cxf), perhaps i dont have it installed, but where can i get them from? As i remember i downloaded cx-one from the official omron web page after login etc, so thats why i dont understand why am i missing the fb libraries What else place there is to find useful FB-s? Thanks!
  23. Hello.   A colleague sent me a screenshot (attached) with a peculiar issue. An ADD function that only sends 0 as the outcome, and a DTOS function that only sends " . I have confirmed that all variables used in the ADD block are declared as integers, and both SumInt6 and String10 are not currently being modified somewhere else.  This impatient colleague is baffled, while I am just sharing this issue in the hopes that someone will eventually come with the simple answer that we are overlooking, or a complex one that we could never hope to realize by ourselves.   Thanks in advance.
  24. Unable to Monitor in GXworks2

    Hi! Anyone can help regarding this issue. I'm not able to monitor the Motor Block that I have created. there's no error either in the output screen but i'm thinking what is the cause of not running in the simulation which shows the Motor Folder RED  even it was compiled. thanks for the help!     Note: I'm new in mitsubishi.
  25. GX Works3 Projectlib Locked

    Hello, I have a problem that I need to solve in a PLC program has it's projectlib locked.  I work for a company that contracted a PLC programmer before my time to program their new version of their control cabinets. The company did not write any specific contract with the contractor and just relied on his work. The guy later delevered a buggy software that is kind of functional (the bugs came up at the commissioning after the guy was paid and now he refuses to help or to provide more consultations). I have as a task to freshen this up and make it work without bugs, the problem is that the Projectlib is locked and I cannot access the source code.  The only thing that I can changes that I can make to the code is to put some logical circuits between the I/O of the already existing function blocks, which solved some problems, but not all and it keeps one of the most important ones as well. Anyways, that's my story, so now my question is, is there and possible way of unlocking the projectlib? Any feedback would be highly appreciated. Thanks in advace!