Jazz, M91 PLCs and U90Ladder
Talk about issues related to Jazz, M91 PLCs, and the U90Ladder software
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By Kestralcontrols · Posted
Hi NoamH, Thanks for the quick reply. I was using this method, but it kept failing. The problem was that the SD file structure on the card is not the same as it is shown on the HMI file browser. I was trying to download a file that was located within the Data Tables directory. I assumed that the directory was named "Data Tables" because that was what the file browser named the directory, but when I removed the SD card and read it, the real directory for storing Data Tables is named "DT" When I changed the path to /ExternalSd/DT/08-18.scv instead of /ExternalSd/Data Tables/08-18.csv it worked. Thanks again. Sam -
You are trying to program like you would a computer with some other language, not program a PLC with ladder logic. PLC ladder logic should be organized completely differently. Every rung of every subroutine should be evaluated on every scan. You probably should be using a State Machine instead of what you're trying to do. Our resident genius, @Joe Tauser, has written an example program to help educate us on this terrific technique to handle the type of situation you are trying to deal with. Looking at your edit, it appears you might be headed in the direction of a State Machine, which is great. Look at Joe's example program and see if it helps you. -
Hi Kestralcontrols,
In order to download a file that stored on the SD card via a web server "Hyper Link" use the prefix "ExternalSd" before the path to the file.
For example, lets assume the next file exist on my SD card "/MyDir/MyFile.txt". and that I have a "Hyper Link" widget that it "Tag:Link" is tag PATH_TO_FILE. If I will set PATH_TO_FILE to "/ExternalSd/MyDir/MyFile.txt" and press on the "Hyper Link" on the web site the file will be downloaded:
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By Kestralcontrols · Posted
Hi,
I'm trying to create a Web Server link to download a file stored on the SD card. I have tried copying the example shown in the help-file section "WE: Hyperlinks" but it returns an error "invalid URL address".
How do you covert the SD card path into a valid URL so that it will link the anchor text to the SD card file. Kind Regards,
Sam -
Hello, As you can see in the "Note" section of the SD Management chart, the "Maximal number of files in SD" is expressed per Data Sampler folder. Hope this information helps.
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