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  1. Hi Everyone,I have a customer that needs a CQM1H (CPU51) replaced. They purchased the processor new-old-stock from a source they found online. It arrived in the original packaging and had the safety label around the top of the unit, so it seems that it is as advertised and no need to suspect that it would have problems. I purchased secondhand, a power supply to attach to it and program it from the bench instead of in the machine. The customer also provided me with an SD card containing the project file(s) for the machine. I am able to load the project in CX-ONE (running on Win 7) just fine. My computer has a native serial port (COM1) and I built a programming cable to work with the DB9 peripheral port according to a diagram I found online.The processor powers up right away with the ERR/ALM continuously on. No other LEDs came on initially, and after a bit of playing around with communications settings, I finally landed the right protocol and my computer seemed to identify the processor correctly. I compiled the source and attempted a transfer to the PLC. I got some failed message (or maybe messages) at the end of the transfer. It did seem to send all of the binary code, it just ended with an error message that I unfortunately didn't write down or grab a screenshot.Anyway, what I have now is a PLC processor with the ERR/ALM LED on always, I've never seen it in RUN mode, and now after the programming attempt, I'm seeing the COMM LED strobing at about a .5sec frequency (with or without a cable attached to the peripheral port), AND I cannot get CX-Programmer to again acknowledge the processor anymore. I'd like to reset this back to the way it arrived to me, but can't figure out how to make that happen offline. The DIP switches don't seem to cause that effect. I should say also that the DIP switch settings are all OFF except 3 and 7.Any help is much appreciated!Thanks,John  
  2. Hi all , I have been using MELSEC - Q series plc for the past two project i dont find any issue with that but for the third project  used same PLC same model but there is issue which I found unable to resolve  The issue is when i try to communicate PLC using LAN cable by direct ethernet connection it works normally but by communicating using HUB network I cannot communicate, I checked all the parameters setting, I dont know what is the issue even contacted mitshubshi service to troubleshoot but they are not responding  So here i am for your guidence to solve this issue   see the images below to analyse this issue This connection is direct ethernet connection which works normally    The parameters are set and writed to PLC The IP is set to my PC for communication  When i try to find the cpu in the network it shows the cpu IP  After that I checked for connection Test it show error I have also attached the Network route which i used to communicate  Network Drawing.pdf I hope someone will help me to solve this issue Thank you , madhan ravichandran
  3. Hi all, I would like to know how to communicate scale indicator device mettler Toledo ind 320 using  module QJ71C24N-R4 by predefined protocal   I also tired to communicate in CH1 with the G.INPUT instruction to communicate when the device in MT continue mode it does communicate but I dont know how to convert value Now by trying modbus communication predefined protocal works fine but i cannot read data the is no SD/RD transmission happening  Can anyone help me with this  Thank you serial monitor.gxw serial monitor.gxw
  4. Crouzet Millenium 3

    Recently had to get a program out of a millenium 3 plc which I had programmed a few years ago but the cable would not connect.The only difference this time ,as my laptop no longer had a rs232 port,was the use of a USB to rs232 converter. Having trawled the web I managed to find the circuit of the interface cable below. It looks like the signal from the computer uses the negative going part of the pulses which aren't present on most usb to rs232 converters. Is this correct?
  5. Hello, Good Day All. I am facing this issue while I am going to copy old plc to new plc. but old plc having 4965 steps, once going execute this program to new plc its showing more than 8000 steps. please suggest on this. PFA.
  6.   Hello, I downloaded the program from the M251 PLC program, using the SoMachine4.3 environment. However, the downloaded program does not compile because the library is missing. The library is from a different manufacturer. Is it possible to find this library on the M251 PLC device? is there any way?
  7. Hello friends I have worked with other series of omron plc but this is the first time I am working with cqm1h cpu51 series. In a factory, 4 of these PLCs exchange data with each other with a clk21 card. After a problem with one of the CPUs and replacement, I was never able to download the datalink settings. I did all the steps in the manuals step by step but I did not succeed. In cx-net software, after selecting online, I selected the data link menu, but as you can see in the attached image, the setup button is never activated. Thanks for guiding me
  8. Anyone you know any books,software or educational package to learn plc program at home Please??  
  9. Mitsubishi Fx2n Modbus rtu vfd

    Hello everyone, may you all bless with the best. Can anyone please help me on connecting and programming In Modbus rtu INVT CHF-100A vfd with FX2n having rs485-bd module. I want to connect 11 vfd and one fx2n plc also .
  10. Mitsubishi Fx2n Modbus rtu vfd

    Hello everyone, may you all bless with the best. Can anyone please help me on connecting and programming In Modbus rtu INVT CHF-100A vfd with FX2n having rs485-bd module. I want to connect 11 vfd and one fx2n plc also 
  11. Hello everyone,  I have a Panelview plus 600 ( I know it’s old but I’m trying to get it to work). It’s on a yogurt bucket filler, I don't have any application to run or to do anything. What software do I need on a computer to be able to transfer it to the panelview. Is this even possible?  There is nothing in the memory right now but how to I program it and what program do I use?  I’m in the Los Angeles area and even willing to pay for someone to come and do it.  I need to get this to work, thank you so much. 
  12. MITSUBISHI A1S68AD PROGRAM

    HELLO EVERYONE I am having problem writing in A1S68AD program, please help me out. My system configuration is as :- 1. A1S POWER SUPPLY   2. A2SHCPU   3. A1SJ71AT21B    4. A1S68AD  5. A1S62DA  6. A1SX81-S2 7.  A1SX81-S2  8. A1SX81-S2  9. A1SY10  10. A1SY10  11. A1SY10  12. A1SX80-S2  13. A1SX80-S2 14. A1SY10  This is my existing configuration. But now there is one more slot empty and now i want to add one A1S68AD CARD in the empty slot, i tried writing the program for this card, but plc gives me error. SO, anyone can send me the program with addresses for this card. It will be very helpful as I am new to this A series Mitsubishi PLC. AND HERE BELOW IS THE ATTACHED EXISTING PLC PROGRAM AND SYSTEM IMAGES. PLC PROGRAM.zip
  13. Hi Y'all, I have been working on a drive upgrade.  I am going from a 1336 impact to a PF 753.  I changed everything over on the Map I/O tree to ethernet.  The question I have is...my Control Net is in demo mode. We are waiting om a tech support contract with software subscriptions to go through.  Will I still be able to download the logix 5000 program that works with the CNET configuration files?  Also I deleted the drive off the config file.  Is there anything I am missing other than drive parameters?
  14. I am trying to online edit a program in a MELSEC QCPU, using GX Works2, but I keep getting this error "A file which does not exist in the PLC was specified" <ES:010a4022> Few weeks ago I had just online edited the same program in the same PLC with the same steps with no problem. There had been no changes to the PLC after that. Just all a sudden when I try to edit yesterday I get this error. Not an expert in Mitsubishi, just started learning the basics. Connection to PLC is by USB cable. Steps I followed to connect to PLC:    -Online > Read from PLC    -Select PLC Series: QCPU (Q mode)    -Select PLC side I/F Serial Setting: Serial USB    -Select all target program to Read, then Execute I am editing the file that I had just read from PLC Steps I followed to online edit:    -Online > Monitor > Monitor (Write mode)    -Execute the function below when mode is changed: Checked all    -Edit the program (basically just deleted one -||- contact and drew back the line)    -Compile > Online Program Change Then Bam! error get! "A file which does not exist in the PLC was specified" <ES:010a4022> I had tried Verify with PLC, but all results match. Is there something I am missing? Help much appreciated!
  15. Fatek Ethernet PLC Module online

    Dear All,  Anybody can help me in communication between Fatek 20MAR2 & CBEH2A. The jumpers setting are JP1 is on left two pins (No password protected) & JP3 is on right two pins (forced boot operation mode). The Ethernet cable i used is type b T568. Fatek Ethernet module config software detecting module successfully (shown in attached pic) but on online PLC via ethernet cable its showing connection failed.   please help   thanks in advance
  16. Hi fellow PLC veterans, I am new in the PLC world so please forgive me if my questions read dumb to you..   I am just wondering if there are any newer PLC machines that can: 1. keep the program even after its battery is completely flat or faulty  (Is this even possible?) 2. allow users to copy and save the program somewhere so one can install the program again without the need/presence of the machine supplier What tools/software may be required?   Thank you for reading and look forward to your response :)
  17. Unconverted Ladder Code?

    Hi All, Please see attached screenshot: Whenever I want to save the ladder program or start simulation, this window pops-up. If I press 'yes' I loose the whole work. I tried to open existing program and modify it, but it did the same. When I clicked 'yes' I lost all modification and just the original program remained. (I made the program in the morning, opened and saved many times but it started popping this window later.) I work with FXCPU series, FX3U/FX3UC type, simple project in ladder. This worked well but now is not anymore. I use Melsoft GX Simulator! Can anyone advise why this is happening? It is very annoying! It is pointless to work on anything now! Many thanks
  18. Dear Forum, Recently, i needed to upload the PLC program and the configuration from an OMRON PLC CQM1H-CPU61. I used the program CX Programmer V9.5. My PLC is shown bellow: In the connection instructions i found that i can connect to the RS232 port and communicate with the PLC directly (Method D Shown Bellow). Do i  need specific cables? If yes, please refer them. I tried with the Prolific RS232 to USB Adapter , but with no results. Thank you in advance. Argyrios
  19. I have an analog output card 1734-OE2V and there is in the fault/actions page parameters for program mode. What is program mode and when it is activated? Fault mode is clear but... Program should be written the value, but when this happens?
  20. Hi, I am working wih 251MESE and somachine 4.3 And I am developing an application and the user who is going to use it needs to donwload a graphic that appears on the webvis, with all the information that it contains, does anyone done this before? How? I need some tips. I have the webvisu up and running I need something like download button to be able to download the info.   Thanks!
  21. Pumps controlled with counter

    I need som help and suggestion how i can control 2 pumps that shall go 10 times each?i have 2 level sensors that is giving it the start and stop,and pump1 shall start 10 times,then pump2 shall start 10 times.Can i use CNT and how is the best smooth way to do it?   thx
  22. Hello Im trying to read from my PLC but i cannot see the program file.  However, if i try to compare it using other file program, i could see the program file. Is their any restriction in my software?
  23. Sysmac Studio

    Hello ,  Is my frist project on Omron and also on Sysmac Studio .  I have one PLC NX1P2 - 9024DT1 I write a sample program on ST with internal variable ( struct ) but i receive an information that i dont have permition to write on Var  Ps.  I can uploaded file with image   
  24. Upload & Download Program

    Hi, I will upload a program from PLC and Download that program to another PLC. Do I need to Compile the program before I download it to the other PLC?   Software: Gx Developer.         PLC: FX-2NC-32MT       Communication Cable SC09 Note: My laptop has only usb port   Thanks for your support
  25. FX-2NC-32MT PLC program Download

    Hi, There are two machine in the factory controlled by Fx 2nc PLC. One machine control part is not working. It could be for battery failure. But the other one is working properly. In this case can I change the battery?  After that,  is it possible, I upload the program from the good machine PLC and download it to the other machine PLC? Regards Sohel Ahmed