Re: [foxboro] AIN Block Invert

You want a BSCALE of 100 and a KSCALE of -1.0.  I think that gets it.
KSCALE is the slope and BSCALE is the Y-intercept.  You want a negative 1
slope with a Y-intercept of 100.

Tim Lowell
Control Systems Engineer
Phillips Petroleum Company, Trainer Refinery
Phone:  610-364-8362
Fax:    610-364-8211
tlowell@xxxxxxxx


        -----Original Message-----
        From:   michael.telgenhoff@xxxxxxxxxxxxxx
[SMTP:michael.telgenhoff@xxxxxxxxxxxxxx]
        Sent:   Monday, September 16, 2002 9:37 AM
        To:     foxboro@xxxxxxxxxxxxx
        Subject:        [foxboro] AIN Block Invert

        I have an AIN point that is inversely proportional to a level.  Does
anyone
        know if I can invert the reading to the .PNT within the block, maybe
using
        KSCALE and BSCALE?  I thought BSCALE of -100 and KSCALE of -1.0
should work
        but I just get BAD I/O readings when I do it.  I want the scale to
be 0 -
        100%.  When I get 4 mA, I want to show 100% and when I get 20 mA I
want to
        show 0%.  Thanks for any help.

        > **********************
        > Michael Telgenhoff    Midland Plant Process Control Engineer
        > Dow Corning Corporation       Voice:  989.496.6855
        > 3901 S. Saginaw Rd.   Pager:  989.926.2706
        > Midland MI 48686-0995 Fax:    989.496.1897
        > mailto:michael.telgenhoff@xxxxxxxxxxxxxx
        > **********************
        > 


        
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