Steve Bailey

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About Steve Bailey

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  • Location Berkshire County, Massachusetts
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  1. GE90-70 LM90 application help

    Once a program has been modified using PME, it can no longer be opened with LM90. But the PLC itself doesn't care what program you employed to create the program you want to download to it.In answer to question 1, PME can recognize and upload a LM90 program. LM90, being older software can't recognize a PME program.In answer to question 1a, you will find that after uploading a LM90 program using PME, you will be in a "Logic not Equal" state. Thus, you won't be able to make online changes without first downloading what you just uploaded.In answer to question 3, LM90 permits online changes.In answer to LM90 question 1, yes to both downloading a LM90 program to a PLC previously programmed using PME and to later downloading the PME program to the same PLC. I doubt if the firmware will be an issue, but I can't give you any guarantee.In answer to LM90 question 2, you can generally download program changes to a 90-70 without stopping it. The way LM90 does online changes, it will download the only the modified program blocks to available free memory and then change the starting address of the subroutines. Doing this enough times eventually creates fragmented memory. If there is not a large enough block of free memory to accommodate the modified program blocks, the online change won't be possible. In that case you would have to stop the program before downloading.Having said all that, the fact that you have a redundant system complicates things. GE offered multiple redundancy strategies over the years.. Some of them included proprietary program blocks along with the ladder logic specific to the application. Your best bet is to get the manuals for your particular redundancy strategy and familiarize yourself with the procedures for making modifications and for downloading those modifications to both CPUs.
  2. PLC Basics

    That's PLC Law #18 and #18.1! https://forums.mrplc.com/index.php?/topic/9522-plc-law/
  3. Fanuc AIF01A PLC Software

    To me, that item looks like a remote I/O interface module that connects back to a CNC controller. I believe the ladder editor for the CNC is called Fanuc ladder. https://www.fanucamerica.com/products/cnc/cnc-software/programming-simulation-software/ladder-iii
  4. GE fanuc

    I don't know what application is generating the message. What happens when you click either "Hide"  or "Cancel"? The start button could be a group of objects and one of the items in the group could be generating the question mark. But the button might still do what you need it to do even if one of its objects isn't properly linked to a PLC variable.
  5. GE fanuc

    I'm not aware of any GE Quick Panels with Windows 2000 as the operating system. They used Windows CE. It sounds like the old unit isn't launching the View runtime application at bootup. If there is an icon on the desktop labeled "View Runtime", double click on it. Can't say anything about why just a single object on the replacement unit doesn't work while other objects work fine. Is Emerson still offering the same models that GE did before selling the product line to them?  
  6. GE Fanuc HMI

    I think recreating it on something current would be your best bet. The design of your current HMI is opposite to the state of the art. In your system, the PLC, through the ADC311 coprocessor, is the engine that that drives the display. Current best practice is for the HMI to be a self-contained entity that requests whatever data it needs from the PLC. The software to create the HMI application in the ADC311 module was an add-on to Logicmaster (DOS) software. I don't believe it was ever ported to Logicmaster's successors.
  7. GE Fanuc HMI PC

    Sorry, but I don't recognize that one. Can you tell me anything about the program it launches when you boot it up? Also, what module in the PLC does it connect to?
  8. GE Fanuc HMI

    That looks like a GE-branded Nematron unit. It should have the screen editor built-in. You need to connect an old IBM XT-style keyboard to it. The publication number for the manual is GFK-0505. What type of PLC is it connected to?
  9. Datapanel 150 part number

    The characters after the dash generally represent firmware versions. That assumes the part number is similar to IC752DFT000-GF. For best results the firmware version of the replacement should be newer than the original. Firmware -GF will be compatible with applications created for older versions, but not guaranteed compatible if features were added in later versions.
  10. Windows 10 Proficy Serial Comms

    My experience with serial communications from virtual machines (although not a Windows 10 VM) is that you have to pay close attention to the COM port number. Your USB/serial converter on the host machine might be assigned to COM3, but it might be COM1 on the VM.
  11. PME RX3I Ladder MIN Select

    Use the SORT instruction.
  12. PLC/ HMI serial port interface

    If your HMI has two serial ports and its scripting language has decent string handling capabilities, that's the easiest way to get it done. Read the characters from the serial port as a string, extract the number from the string and write it to a PLC variable.
  13. PLC/ HMI serial port interface

    I think you're going to have to change to a CPU model with serial ports. You have a second serial port on the CMM311 module, but it is limited to SNP, CCM , and RTU protocols, none of which appear to be available on the scale. If you can get your hands on a CPU with a serial port (CPU351, CPU352, CPU363), there is sample ladder logic in the manual GFK-0582D for setting up the port to receive serial data. Another possibility could be if there is a second serial port on the HMI and if you can write a script in the HMI to handle serial port communications.    
  14. PLC/ HMI serial port interface

    It is possible, but the devil is in the details. You will need to know the details of how the weigh scale interfaces to the world through it's serial port. Some can be set up to transmit the current weight periodically. Some will  only respond to requests from an external device like a PLC. On the 90-30 side, a lot depends on which hardware you're using. Some 90-30 CPU models have built-in serial ports that can be controlled from the ladder logic. In the absence of a CPU like that, there is the possibility to add a serial communications module or a Basic language programmable module with serial ports.  So for starters, what is the brand and model number of the weigh scale? How is the Proface HMI connected to the PLC? What PLC CPU model are you using? Are there spare I/O slots available in case you need to add a module?
  15. 50 FLOORs LIFT PLC SELECTION & PROGRAM

    In my opinion the control system for an elevator spanning 50 floors is a task for an OEM of elevators and does not qualify as a DIY project.