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Okay, I think I figured it out. Its all in C-more so I don’t have to restart the PLC - weird things happen when I do that. I was able to set V2000 by first changing the two control references to look at another tag – didn’t really care which. Once it was no longer referenced, I was able to...

Hello All! I have a sneaky issue that I really need some help with. We have a DL405 PLC and a EA9-T12CL HMI. The PLC was programmed with a Fault Code tag - V2000 and it is filled with values from K1-K600. The HMI has a Lookup Text that uses these codes and translates them to the proper error...

I'm hurting here and really need help. I have an old machine running a AutomationDirect PLC 405. I have a data collection system that is successfully gathering data from this PLC, and from the KEPWare OPC Server I have been able to gleam from the KEP tags the various PLC Memory addresses. Many...

Not sure if this is the best place for this, but I have an electromagnetic application where we are driving 2 coils with 0.2-2.0 amps with TDK Lambda power supplies. The application requires reversing polarity of the current and this is where we are using the ice cube relay. It is critical...

Sadly the websites that are listed above only document where to purchase the software - I have not been able to find anything on AutomationDirect.com's website that has anything that would remotely be termed tutorials or learning forums. I beginning to believe that Think n Do is a dying product...

I recently started a new position with a new employer - large factory - complicated product. We have an old-time automation engineer that is a 'Think and Do' only kind of guy (We also have a lot of Labview being done here). I would like to learn Think and Do so I can help him bring some of his...

I have a flat plate (~16in^2) that has enough heat input to get upwards of 500°C during processing. I have been asked to look into cooling it with LN2. I don't even know where to begin. Some of my questions are: How do I provide a specific flow rate of LN2 at pressure to cool surface? What...

Hello! I have a process I am trying to control and need to cool a round, flat plate - localized temperatures can get as high as 500°C. We currently use a fixture that has cooling water flowing through it, but we believe that as the plate that needs to be cooled gets hot, deformation occurs and...

djs... That looks like it could work, but... I need it in reverse too. Is there such a creature, and can it work in Ladder with all 16 bits? This is getting close, but there are still some gaps and this last 'reversal' may be the trick. THANKS!! "To be or not to be, that is the question"...

Paulusgnome: I have constructed an array of type WORD but am receiving still receiving the error shown in the attached graphic. What you are describing is exactly the functionality I really need - any help will be very much appreciated! I am using Unity Pro version 10, but am happy to upgrade...

The MUX instruction seems like it only selects between 2 inputs - I need 12, and possibly more in the future. Not only that, but I also, typically have 2-3 conditions that at least one is dependent on the index and others are simple logic. Thank you for the suggestion though. Maybe it will...

djs. You are right - changed the type from a DINT to a WORD and if I write this: UDT_NAME.MemberDINT.1 where 1 could be 0-15 and Unity accepts it no problem. However, I need to step through the indexes programatically - and I cannot figure out how I do that based on the number contained in...

I am trying to convert an Allen Bradley RSL5k program and am stuck on an addressing issue. In AB I have a UDT with a DINT member. I step through the bits of the DINT programatically with the following code UDT_NAME.MemberDINT.[StepVar] and then I simply cycle through the applicable bits of...

We have a product that removes debris from raw sewage. Essentially it is a drum screen enclosed in a large, enclosed tank. The tank has covers to help contain the nasty sewer gases, liquids and wash spray that will be present as part of the process. In the past the drive motor ~1HP, 3phase...

We have a new job where we will be providing a hoist type of equipment - that typically travels back and forth on a monorail. However, this particular job we are mounting that monorail, or better stated, that monorail will be part of the Bridge of a bridge crane. Typically, for positioning and...

Thanks for the comments. I like the idea of air-brakes, but we don't have, and will not be supplying compressed air. Air latches or brakes are not a possibility. I also like the idea of using a VFD, BUT, with the disconnect at the motor, it would be possible for the motor to be running at...

Known: Class 1, Division 1, Group C & D environment 5 HP Induction Motor with a impeller type blade attached. Local (at motor)Disconnect. Blade can be accessed before motor comes to a stop. In a non-hazardous environment we typically supply a solenoid to latch the access till motor spins down...

Here's a resource that seems like it has some good stuff for preparation ideas and materials: http://www.engr.psu.edu/cde/FE_PE/morons_guide.htm "To be or not to be, that is the question" - William Shakespeare via Hamlet

Due to an unfortunate turn of events, my previous post was deleted. This is an attempt to repeat. Please contribute. I have been working as an Engineering Professional since June 2003. I have worked in Mechanical Design as well as Electrical Controls. No this isn't an resume. I am in...

Oh, should have said that I have been using VMWare Player and would have to upgrade to VMWare Workstation. I have a laptop running Windows 7. I also have to use Modicon Unity Pro and have also had GE's Proficy installed - which really messed up boot times, but that is another topic. "To be or...