ElectronGuru

MrPLC Member
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Posts posted by ElectronGuru


  1. I haven't watched your posted video yet, but....

    Parameter 36, Motor NP RPM; is that value correct? 115 RPM seems awfully slow.

    Have you tried changing Parameter 47, Speed Reference to Drive Pot? If it starts behaving then you know the drive is ok and the problem is with the external speed reference source.

    As for the pulse train input, have you moved the jumper for DigIn on terminal block 7? This must be moved to Pulse In for that feature to work.

    I doubt this has anything to do with it but... The PF525 carrier frequency is 4KHz at anything above about 15 simulated Hz output. When you drop below about 10 simulated Hz output, the carrier frequency changes itself to 2KHz, then back to 4KHz when above 15Hz. Those aren't exact numbers, though. I've played with this many times using a scope on the output terminals UVW while watching the "Hz" on the PF525 display, and that 10 to 15 Hz area is a sort-of deadband for the carrier freq change. But it doesn't always hit on the exact values; just very near them, and you've said your values are hitting exactly every time. For all I know you could be experiencing this on a test bench but if you have any ambient EMI is the 2 to 4KHz range (other drives running nearby without shielded cables, welders, two-way radios, etc) that *could* be causing your issue. I know it's a stretch but once in a very great while I see something freaky like this.

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  2. I've always associated recipes with FactoryTalk ME/SE or FactoryTalk Batch software. From FactoryTalk, a recipe merely loads a pre-defined set of values to a pre-defined set of tags, usually the controller tags. The only way I can think of to create a recipe in Studio5000 is to use sequencers in ladder, or maybe write recipe steps in SFC code. 

    I looked in the Studio5000 help and can't find anything that directly references native recipe instructions or tools. If anyone knows of Studio5000 recipe instructions or tools, or has another "trick" up their sleeve, I'd love to hear about it.

     

    Recipe.pdf


  3. I've found that the best, easiest way to add modules is to physically install them, power up the chassis and any remote I/O, get online with the controller and use the Module Discovery feature.

    If the modules are showing up on the catalog list, they're should be compatible with Allen Bradley controllers. But that doesn't mean that every Wago component is compatible with every AB controller. As @pturmel suggested above, I'd get my hands on any literature about the module you're trying to add and see if there's a compatibility issue or other restriction that's keeping you from adding that module to your particular configuration. 

    If you are missing an EDS, check to see if you can upload the EDS directly from the module via RSLinx Classic. This can be done on most Allen Bradley controllers and communications modules, but I'm not sure about 3rd party modules.


  4. Rockwell has several training and certification programs, the most common of which is the Studio5000 Programmer and ControlLogix Maintainer certificates. While there are five levels of training available, successful completion of only levels one, two, and three are required for testing eligibility. @Integrator for life, is this the program you're going through, or are you participating in one of Rockwell's internal sales- or field service engineer training programs? Where are you taking the classes?

    @Mickey, RAU = Rockwell Automation University. For almost all of Rockwell's certification programs, the tests are online and timed. While there are typically less than 100 questions on any given test, they are randomly pulled from a bank of thousands of questions. As you can imagine, Rockwell doesn't exactly publish that list. The biggest tip I can give people going into a Rockwell online test is that you can navigate back and forth through the questions. Therefore, don't waste time on a hard question; just write down that question number and move on. Once you've answered all the questions you're certain of, go back spend the remaining time on the head-scratchers. The only other thing the OP can do here is tell us which questions he/she had a hard time with after the fact.


  5. I've been tinkering around in CCW V21 over the last couple of days and can't find anywhere to download to a single DPI port. In older versions you could swap something like an extended I/O card out of a PowerFlex-755 and upload/download that card's parameters, only. Did they remove that feature or just hide somewhere I can't find? 

    They just released V22 last month but I don't think I'll download that one just yet because the release notes say that the trend tool is disabled. 


  6. @VFD Guy I think the problem the OP is having is that he can't get his PowerFlex 525 to work as a stand-alone. If I'm remembering the thread correctly; the drive works well from the network but will not work in manual when disconnected from the network. I believe he's trying to control start/stop/speed from the keypad and pot on the drive, itself, and not getting anywhere, even after disconnecting from the network and changing the appropriate parameters. 


  7. @Joe E. To answer your question, I don't know for sure. I've always associated factory resets with drive parameters, not with ADC. The ADC feature is enabled from ControlLogix in Studio5000 and I've never had to disable it once set, so I can't say with any degree of accuracy if a reset (from something like the Setup Wizard in CCW) would have any effect on ADC. I think that if it's enabled in the device definition in Logix and that drive shows up on the network, Logix is going to write configuration data to it. 

    I had the opportunity today to fool around with both a PF755 and PF525 with and L73 controller. This is what I found before getting kicked out of the lab:

    If ADC is enabled and the drive is removed from the network (like unplugging the Ethernet cable, as the OP says he's done), then you can make parameter changes and the drive will respond to the changes. Once the network cable is plugged back in the drive goes into a fault, re-boots, and comes back up with the parameter values written from Logix via ADC. 

    All that to say, it wouldn't matter if the drive is owned by a controller with ADC active. Once the drive is disconnected from the network it is a stand-alone and should respond to program changes, and be operable from the faceplate.  

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  8. When you don't have an external, hard-wired stop button, 1 to 11 should always have a jumper. When you remove 24vdc from terminal 1, that is a stop command. Since you can see the speed command changing, the problem is not with the speed reference and there shouldn't be a need to program for speed + start. We need to find out what's inhibiting the start. 

    Did you previously answer that you definitely have 24vdc at terminal 1 when keypad is selected at the start source?


  9. I read your last response about the parameters 62, 63 , etc and completely missed your previous post about your display indications and wiring. This actually changes some things, so sorry, here goes another (belated and out-of-sequence) post. 

    The fact that you're not getting a RUN indication on the display means that the command module is essentially ignoring the keypad start input. This means you may have an active stop or safety. 

    Terminal 4 is the digital input common for sourcing (as opposed to sinking) inputs, and has no programmable function. If you have no other digital inputs, I'm wondering why there's a wire landed there. 

    Digital input 1 is always the hardwired stop. Whether it's sink or source, you remove the 24 volts from there and the drive stops. This is why when there is no hardwired stop/stop controls there's a jumper between 1 & 11, keeping DI-1 hot. Just for kicks, put a volt meter on DI-1 and see that you have voltage whenever you're trying to start the drive. I believe this is tied internally to the safety 24 volts, as well. Are you using the safety circuits? If so, this is likely what's keeping you from starting manually. 

    The programmable digital inputs are on terminals 2 & 3, and 5 through 8, and they are programmed at parameters 62 & 63, and 65 through 68, respectively. The defaults are usually benign and wouldn't cause a start inhibit if nothing is wired to the terminal, but I'd set them all the 0/Not Used just to be sure.

    As for viewing the parameters on the laptop, Connected Components Workbench (CCW) is free and it will change your life. Download it and you can get on any PowerFlex drive without Studio5000. 

    If absolutely none of these suggestions work or even lead you to the solution, it's unlikely but not impossible that you may have a bad button on the command module. if you run out of ideas and have the down time, try swapping it with a known good one. 


  10. My experience is that when you close and re-open a display that has a trend object, you're starting from scratch with all new trend data regardless of which PanelView model it's running on. In fact, I've seen the trended data disappear just by stopping and re-starting the trend without having closed the display.

    I believe the default path for PanelView trend data is Windows CE > C:\Logs, and while the data should always be available there (or wherever the configured Data Log path takes it), I don't believe the trend object itself will hold previously trended data.


  11. Are those the values of the drive status parameters after you push the start button on the keypad? If not, see what those values are while holding the start button down. 

    Do you have a FWD/REV indication in the upper-left of the display?

    Do you ever get the RUN indicator directly above the FWD/REV?

    Do you have any hard-wired digital inputs for external start/stop/speed commands, jog speeds, etc. Besides the safeties, any hardwired inputs at all and what are they programed for?

    Something (obviously) is inhibiting a manual local start on this. Just gotta figure out what it is. If you have a different 525 drive that is working in manual, best thing would be using CCW to run the Compare Tool on them. Do you have CCW? It's free download if you don't.