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About JRoss

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    You want it when?
  • Birthday 06/05/79

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  • Website URL http://www.rossautomation.net

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  • Location Dillsburg, PA
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  1. Another Dumb newb question

    I got the AOI from a colleague, but I suspect he got it from Rockwell. I've tweaked it a little, but the guts are essentially the same. I modified it so that I don't have to assign separate tags for the min/max parameters and added an "In Range" bit. I'm also planning to add a clamping feature in a week or so.
  2. Remove Labels - GXWorks2

    Maybe try to download it to a PLC, then create a new project without labels and upload the PLC.
  3. Another Dumb newb question

    There isn't a built-in scaling instruction in Logix 5000. You can use the CPT (compute) function and put the computation in that way. I use an SCP add-on instruction (AOI) that I got from a colleague years ago and have modified slightly. It mimics the operation of the SCP in Logix 500 and is much easier to use. It's basically the CPT function hidden inside an AOI with a couple of other features, but I like it. PM me your email address and I'll send it to you.
  4. Servo JOG mode vs Speed Control mode

    I think the only difference is that in jog mode you don't have control over the speed using digital inputs or analog input. I would use speed control mode in your application for that reason.
  5. GS2107

    GT Works 3 (of which GT Designer is the main piece) is for programming HMIs. GX Works is for programming PLCs. The two packages are complementary, but serve completely different purposes.
  6. GS2107

    That's excellent, glad to hear it.
  7. GS2107

    <rant> Why do we have to do this? Why can't Mitsubishi either (a) Put the GS Installer in an obvious location and publish big notices that it needs to be installed or (b) simply add it to the installer script so nobody has to do anything? This seems like an idiotic oversight. I went through this the first time I tried to use a GS21, and have gotten a call from every one of my customers that gets GT Works 3 and tries to open a program file I've sent them. There's nothing in the software to alert you, no inserts in the HMI box, no notices on the website, and nothing in the manuals. Is tech support so bored they need people to call about things like this? </rant>
  8. Extension Racks (Q-Series)

    Just to be pedantic, and perhaps avoid some future confusion... The Q3xx racks are main racks, and require a power supply and at least one CPU. The Q6xx racks (as you have in the first setup) are powered extension racks, and require a power supply (not a CPU). The Q5xx racks (your final selection) are un-powered extension racks, and don't require a power supply. In any configuration, you need to make sure that you have enough 5V backplane power to power the modules. The tool makes this easy, of course, though you can always calculate it using the specs for each module. You had enough power left for your additional modules, so you were fine to use an unpowered extension rack. If that had not been the case, you could have used a powered extension rack (with a power supply) to add more power into the system. CPUs can only go on the main racks. You can have up to four, but they must be all the way to the left on the rack, with no other modules between them. Incidentally, the third character in the part number indicates the number of I/O slots, and does not include the power supply slot or the first CPU slot. For example: Q35B - 1 power supply slot, 1 CPU slot, 5 module slots Q65B - 1 power supply slot, 5 module slots Q55B - 5 modules slots
  9. Sum of data registers

    Which series of PLC? See if yours has the WSUM instruction.
  10. help with mitsubishi plc

    The correct software package is GX Works 2, which replaced GX Developer for all but the oldest Mitsubishi PLCs. The FX3G does have a mini USB port, so you can use a standard mini USB cable, such as you might use for a digital camera. The PLC also has an RS422 programming port, for which you would use an SC-09 cable with a USB to serial adapter. There are USB versions of the SC-09 available also. All of the cable options give the same features and performance in my experience. I usually use the mini USB cable.
  11. Starting my career

    Since it sounds like you're hitting walls (ceilings?) trying to work your way in, the associates degree is a good step. It could make potential employers take you more seriously. But definitely find a program that is specific to automation. If you're going to spend a couple of years learning a new set of skills, make it worth while. You mentioned switching jobs as part of this transition. Make sure that you are at least in proximity to automation, so that you can continue building your level of experience. It will help in your studies as well, since you'll be able to immediately recognize and perhaps even apply the things you are learning to what you see on the plant floor. This will help in retention and understanding. And getting demo equipment to play with at home is valuable also. A cheap MicroLogix that works with the free version of RSLogix500 is a good idea, since AB is roughly 50% of the marketplace. But you could also look into some of the other brands, so that you have more breadth. The Click series from Automation Direct is cheap, has free software, and is a good starter PLC for home projects.
  12. help with calculation and roundup from real

    The result of your DINT instruction is 32-bit, but your PLSY instruction is only 16-bit. So you're seeing the decimal representation of the lower half of a 32-bit word, which is basically useless. You need to use DPLSY, the 32-bit version of the PLSY instruction.
  13. Remote Access to CompactLogix PLC

    What's the alternative you found? I use the free version of Teamviewer, which can do the same thing as LogMeIn, but I really should be using the professional version. Unfortunately it's cost prohibitive.
  14. Remote Access to CompactLogix PLC

    I highly recommend keeping the process network separate from the office network. Main two reasons are to limit traffic on the networks and to increase security. That being said, if you're talking short-term, then it could work. You can change the IP settings on the PLC using RS Linx Classic, but then you'll have to change the Panelview Plus program to point all the tags to the new address, as well as changing it's own IP settings. The engineer can do that and send you a new runtime file which you can load in using a USB flash drive. (Though it seems the type of flash drive makes a difference. I just walked a customer through this process this morning, and the first drive he tried didn't work.) Alternatively, you could have IT set up a router or managed switch to bridge the PLC network to the office network without changing the PLC network subnet. You might still have to change the gateway setting on the PLC and HMI, but this won't affect the HMI comms settings.
  15. GT Designer 3 - Text on top of Lamp

    Active elements like buttons and lamps always float to the top. You'll have to hack it. I can think of two options: 1. It looks like your "vertical text" isn't rotated, it's just a column of characters. You can do that in the lamp itself by just hitting enter between characters. If you want to use comments, then use Alt-Enter. 2. You could create an image of the text in the format you want using GIMP or similar, then import the image into GT Works and use it on the lamp.