Home » Categories » Multiple Categories

How do I deal with an unsigned integer in an SLC, PLC5, or MicroLogix processor?
Article Number: 306 | Rating: Unrated | Last Updated: Tue, Sep 29, 2015 at 12:24 AM
Scenario: A device that uses an INT value to represent a range of 0 to 65535, but in the processor the INT tag has a range of -32768 to 32767.

Since the A/B processor does not have an unsigned Integer data type, you will need to convert this value to represent the full range. Simply take your data value and do a masked move (MVM) into a float tag. Your mask will be 16#7FFF. This will move the least significant 15 bits into the Float tag. Then if bit 15 is set within your original INT tag, add 32768 to the Float tag. This will allow the value to display with a range of 0 to 65535.
Custom Fields
    Posted by: Administrator - Tue, Jan 23, 2007 at 1:52 PM This article has been viewed 56161 times.
    Filed Under: 3100 Series, 3150 Series, MVI46 Series, MVI71 Series
    Attachments (0) Attachments
    There are no attachments for this article.
    Comments Comments
    There are no comments for this article. Be the first to post a comment.
    Icon Add Comment
    Name
    Email (Required, but not published)
    Comment
    Security Code Security Code
     
    Related Articles RSS Feed
    What is the difference between 3150-MCM and 3150-DFM?
    Viewed 1 times since Tue, Nov 28, 2006
    Is the DH-485 port on the 3150 module available for use?
    Viewed 1 times since Tue, Nov 28, 2006
    Where can I locate the User Manual for the MVI46-MCM
    Viewed 1 times since Tue, Nov 28, 2006
    Is there a limit to the number of ProSoft modules I can place in my SLC chassis?
    Viewed 1 times since Tue, Nov 28, 2006
    My 3150-MCM block IDs are incrementing until I connect the communications cable. Once the cable is connected, the block ID stops incrementing.
    Viewed 1 times since Tue, Nov 28, 2006
    My MVI46 module faults the processor after cycling power to the rack.
    Viewed 1 times since Tue, Nov 28, 2006
    How can I store my RSLogix500 program in a M13 EEPROM installed in a ProSoft 3250-L532M SLC processor?
    Viewed 1 times since Wed, Dec 3, 2008
    Where do the MVI69E/L Modules store their configuration?
    Viewed 1 times since Mon, Jul 7, 2014
    When the MVI71-MCM is connected using Side-Connect, can a Modbus Master device read and write to the same Modbus address in the module?
    Viewed 1 times since Tue, Nov 28, 2006
    Do you have an in-rack Ethernet I/P solution for a PLC-2 processor?
    Viewed 1 times since Wed, Jan 21, 2009
    • Icon SubscriberSubscribe to Article
    • Icon PrinterPrint Article
    • Icon EmailEmail Article to Friend
    • Icon PDFExport to PDF
    • Icon MS-WordExport to MS Word
    • Icon TwitterTweet This Article
    • Icon DiggDigg It
    • Icon StumbleuponStumble Upon
    • Icon de.icio.usDel.icio.us
    Article Rating (No Votes)
    Rate this article
    Powered by PHPKB Knowledge Base Software