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sgull

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sgull last won the day on December 18 2023

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About sgull

  • Birthday 01/24/1968

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  1. Hi Marvin If there is a particular program you are having problems with then you should upload it. Someone may be able to look at it and suggest better ways of structuring it. There are many ways of achieving the the same result with PLC programming. It is not a case of right or wrong, but many things can be simplified with good habits.
  2. Would it be easier to have 4 different screens for the 4 units. depending on what units the user selects, call the relevant screen and ignore the others.
  3. Hi JW0807 The example above show how to call subroutines when certain conditions are met. The best way is to call subroutines without any condition. Just connect the call subroutine block directly to the left rail without any condition. This way the subroutine is always called.
  4. Hi @Saragani I just tried my version of 1.33 rev373 and it has stopped working. Again I assume that some update has taken place on windows. Normally I would just re-install or upgrade to the newer version. Is there something I can check that would help with this issue? Regards Denis
  5. Hi @Saragani I have noticed with windows 11 that when I download a new version of unilogic the previous versions stops working (clicked to keep previous version). Also some windows updates prevent the current unilogic version from working. In both cases the program goes as far as "loading shell services". A fresh install solves the problem. To go back to a previous version I need to delete the current and re-install the old version. Probably a windows issue but just wondering if anyone else has found this.
  6. Hi Rog In your program you are still using "read input registers (4)" instead of "read holding registers (3)". This is what worked on your PC program. What modbus status do you get when change this?
  7. Hi Rog Status 3 indicates that communication has been made but there is a problem with the modbus command. On the PC communication you are using read holding registers On the PLC communication you are looking for "read input registers (4)" change this to "read holding registers (3)" The addressing should be ok as it worked on the PC program.
  8. The description in visilogic is as follows SI167 and SI168 appear to restrict access to the SI array. Is this a mistake?
  9. Am I correct in stating that you can only restrict access to MB's and SI's?
  10. Hi Agustin If you have the PLC program you could try removing the SD card and CPU from the panel. The battery backup is in the CPU. Leave power off for 15mins and try to start again. you might need to download the program again and enter non retained settings. Sorry, ignore this, I misread the PLC type. Best bet is to contact unitronics support support@unitronics.com
  11. Hi Jacob Have you confirmed that the Modbus address table for both inverters are the same. Because of the size difference and maybe the firmware version of the drive you may have some difference in the address.
  12. Thanks Alex As mentioned the panel eventually came back to life and did a full boot. I didnt find anything unusual with the external SD card. When it stopped during boot several times I removed the CPU and external SD card and tried to Boot again numerous times. After a while it successfully did a full startup. I just dont know how reliable this panel will be now. Is it possible that since the backup battery is in the CPU and that once this was disconnected it cleared the problem with the boot? Regards Denis
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