gitargr8

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About gitargr8

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  1. Actually now that I've gone through a bunch of the code I'm thinking that the SUB is just attached to the top timer output, not both the top and bottom. So basically the timer gets reset when it goes done. This editor really makes it tough to see where the shorts are, and where the inputs / outputs off the instructions are. Is there any setting in ProWorx to change this?
  2. Yeah, I figured that part out, but isn't the timer's accumulator here being overwritten with 0 all the time?
  3. I'm doing a Modicon to ControlLogix conversion, and I'm seeing a few rungs like the one in the attached image. Firstly, according to the manual, the top timer output turns on when timer = preset and the bottom turns on when timer < preset. Do one or both of the inputs need to be on for the outputs to turn on? Secondly, why the heck would someone add 1 to a value, then clear it in the next instruction? It also looks like they're doing the same with the timer accumulator. Any help is much appreciated. Thanks, ~Ryan
  4. Haha, why didn't I think of that?? Thanks for the input.
  5. One other thing, if you decide on CompactLogix, be sure you pick a controller that supports having remote racks. I believe the lowest option is 2 racks so you should be fine, but it's something to keep in mind, especially if you plan on expanding at some point.
  6. WAGO makes some really nice EthernetIP remote IO racks. I've used them in the the past with ControlLogix, and it's actually pretty simple to set up. Add a Generic Ethernet Module, set up the inputs and outputs, and away you go. They're fairly inexpensive, and extremely modular.
  7. Opps, just saw that you're able to write and read to the PLC. I'd try looking at the tags where you're getting errors to see what they're connected to. It's pretty common to get a blue error screen once at start-up though.
  8. I'm pretty sure it's as simple as adding the correct PLC communications to the RSLinxEnterprise section. Unfortunately the comms setup doesn't come through with just the .mer file. Are you talking via Ethernet? If so, it's as simple as opening "Communication Setup" under RSLinx Enterprise on the left-hand tree. Once this is open and your computer is on the plant network, on the right pane you should see a tree called EtherNet and list of all the PLCs on the network. If not, just right click on EtherNet select Add Device. Find the type of PLC you're trying to communicate with, type in it's IP address / slot, etc. On the left pane there should be Device Shortcuts, which is the link to your PLC. Select the device shortcut (it could be named anything), then select your PLC in the Ethernet Pane. Hit the Apply button, then hit Copy from Design to Runtime. I would suggest at this point you test your application on your computer to be sure that the comms are working. Go to Tools, Test Application. Once you're satisfied that it's working, type 'X' to close the application. One more important thing: when transferring your .mer to the panelview, make sure to CHECK the boxes that say "Run application at start-up" and "Replace Communications".
  9. Hi, I'm working on a PLC conversion and I'm wondering if there's anyone out there with the ability to print out 4 modicon programs to a PDF for our company. I looked into buying the Proworx32 software and it's extremely expensive. Not really sure what version the program is, there are 23 different files in each program directory with file extensions of .CML, .CPF, .DCF, .DDF, .DPF, .DSU, .FIL, .LDF, .LGF, .LPF, .MDF, .NDF, .PPS, .RDF, .RPF, .RUF, .SRC, .TDF, .TFP, .TSF, and .TSP. Thanks, ~Ryan
  10. Profibus Network Configuration

    Turns out I was in the wrong PLC, next cabinet over has a PLC with the nodes I was looking for configured.
  11. Profibus Network Configuration

    Hello, I recently inherited a project to commission a palletizer that was moved from one facility to another. The unfortunate part (for me) is that is utilizes a Siemens S7-315 DP PLC with various pieces of remote I/O that communicate over Profibus. Also, all the electrical drawings are in German, a language which I am only familiar with curse words and phrases picked up from WWII movies. I am a complete Siemens newb, but I managed to figure out how to upload the program and get online. When I go to the HW Config screen, I'm a bit puzzled because it only shows 3 stations; the local rack, a small rack on an IM-365, and something called DP-Norm (see attached image). According to the drawings, and my own documentation of the fieldbus nodes, there should be 7 nodes at addresses 9, 13, 15, 16, 17, 23, and 24. Station 13, for example is an ET-200L block I/O module, which happens to be in the same control cabinet as the PLC. When I power it up, and connect the Profibus cable, making sure the terminating resistors are on at the correct places, the Buss Fault light stays lit on the ET-200L module. I looked this error up, and it means that no master has polled its data. There are two ports on the PLC, it looks like one is MPI and the other is DP. I'm assuming that DP is the one I want, but I've tried them both to no avail. I'm probably missing something vital, but I imagine that you set up some kind of table for each node address where you specify how much input and output data will be sent / received, similar to how DeviceNet works. Where is this done in SIMATIC Manager? It's also a good possibility that I'm looking at the wrong PLC, as there is also a B&R processor in the cabinet which talks to the Siemens over Profibus. Thanks in advance for any input, ~Ryan
  12. mV to mA Converter?

    I'm not sure that the PanelView 300 Micro Cutout Template will help me out, but the other two links did. Thanks, ~Ryan
  13. Hello, I need to pick up a mV signal from a load cell summing box to a ControlLogix IF16 card. Right now the range of the summing box is .005 V when the tank is empty to about .023 V when full. This range is adjustable by raising or lowering the excitation voltage to the summing box. I'd thought about setting up the analog channel for 0-5V, but I doubt this is going to give me any usable resolution. Is there a device out there that will convert a mV signal to a 4-20mA signal? Thanks, ~Ryan