Chris Elston

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Posts posted by Chris Elston

  7. Posted

    FYI. If you posted anything from June 12th 2/3am to about June 14 10am. I lost your post. Or if you signed up between those times. I had a corrupt table and I had to restore from BACKUP on June 12th to bring it back. So it's like Friday the 13th never happened!
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  9. Posted

    How many "trigger" bytes can I configure in the Anybus? I thought if I recall, I could only setup one. I've used many, many Ethernet/IP to Serial Anybus modules, just not a Profibus one. The way I did the Ethernet/IP one was I send over a string and the module re-transmits the string. So it does not operate on a trigger byte. Attached is a sample of my Ethernet/IP version. The reason I elected this way is because I made custom AOIs in the AB PLC to send to the registers. Which worked out great. In this new application, I don't need to make an elaborate interface, I was hoping to configure "trigger" bits that would send dedicated strings. I was hoping for maybe 10-20 string I could pre-configure in a gateway. Anybus-EDI-192.168.1.13-RS232-9600baud.zip

  10. Posted

    I want to connect to a Siemens PLC with Profibus DP as a SLAVE, then have a way to send serial strings out through an RS-232 or RS-422 interface. I am working on a super simple application, so I would rather set some FLAG bits in the PLC, and when those FLAG bits are set, have a device send a "serial string" out. I am envisioning a lookup table in this "device" I am looking for, that when a FLAG bit is logical "1" in the PLC, it send the matching "string out" as an output. My question is, have any of you ever used a device like this? Where can I buy one? It's going to be a gateway device of some sort I imagine, but most of the common ones like Anybus or RTA are not made in the way I described. They handle the data as a pass through from serial byte data on the Profibus side through to a hex code on the ASCII serial side. I'd rather have a simple table inside the device, that I can configure the strings and map that string to a bit change of state from the PLC, and Boom Done...

  12. Posted

    I wrote a First Experience Article on this, when I used it on DeviceNET. I am not sure if you are describing the same problem, but I could not clear the buffer. I dunno if that is something you can't do or what. I can describe what I saw here. http://www.mrplc.com/kb/index.php?article=80

  14. Posted

    I think I answered my own questions. It appears that is the case. If you make an AOI in a higher version of Logix 5000 and you export the L5X file, you can not take that L5X file and import that into a lower version. You will get an Failed to Import message. However if you make an AOI in a lower version of Logix 5000 and export the L5X file, you are free to bring that import file upward into higher versions of Logix. At least that is what my one hour experiment has proven to me.

  21. Posted

    You can do that through DDE or OPC link depending how fast and how much data. If you search the Downloads in Allen Bradley for "DDE" there is a spreadsheet with some VBScript how to get data out. You'll need RS Linx running on the PC you want to suck the data out of the PLC with and it needs to be connected the PLC in some manner.