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Flex727

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Posts posted by Flex727

  1. On 10/23/2017 at 12:43 AM, Isakovic said:

    Is it smart to let UTC functions run in every scan?

    I don't know the answer to this either, but I've created many projects that hammer the clock on every scan, not to mention Data Tables, and other very complex functions. Never seen the slightest problem with things not keeping up.

    I do agree with @Ausman that a programmer should never have the PLC perform unnecessary steps, but it's more a matter of elegance and minimizing scan time than necessity to have a functioning PLC program.

  2. Another option for you that's a bit more straightforward, if a bit more cumbersome: If you can group your 60 Program IDs into some logical grouping, say 6 groups (each on a separate HMI screen) of 10 program IDs, you could just have pushbuttons for each program ID. Label each pushbutton with the program ID instead of having the operator enter it each time on the HMI (which can be a pain). Pressing the button turns on a bit that activates the cycle associated with that program ID.

  3. That driver is for use of the Mini-USB port on the newer PLCs. You will need a USB to serial converter (such as this one: https://www.amazon.com/Trendnet-TU-S9-USB-Serial-Converter/dp/B0007T27H8/) and the serial adapter that comes with the older PLCs. I don't have the part number handy for that old serial adapter, but Unitronics (support@unitronics.com) can help you.

    Found one laying around and it says MJ 10-22-CS25 on it.

  4. If you really have 16 hours invested in this project, then I recommend that you install Version Swapper then open your 9.8.64 project and export subroutines and displays, then swap to 9.8.31 and import them.

    I will say though that I don't think it's possible for a file save to only save up to 2 days ago if you're using a new filename. It seems like you have something else going on that you need to address.

  5. A guy is standing on the corner of the street smoking one cigarette after another. A lady walking by notices him and says
    "Hey, don't you know that those things can kill you? I mean, didn't you see the giant warning on the box?!"
    "That's OK" says the guy, puffing casually "I'm a PLC programmer"
    "So? What's that got to do with anything?"
    "We don't care about warnings. We only care about errors."

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