Scaling using ladder logic.

I have a couple of 4-20 mA signals coming in and I need to scale them using ladder logic. One signal will be used to show wicket gate opening, 4=0 and 20=100. The other will be used to show MegaWatt output, 4=(-)100 and 20=100. Any suggestions on how to do this?

I use RSLogix 5000 ver 15.02 to program a compactlogix processor. We recently purchased function block licensing but I can't get it to work. (Is it compatible with compactlogix?)

Thanks

If you are using ladder use this formula

Use the following equations to calculate the scaled units:
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In siemens S7 there is tutorial sample for scaling of input and output. If you need I can send it

[email protected]

bryancva,
You can use the formula that rPraveenkum gave you in ladder logic using the CPT command. (I think that the CPT is easier than using MUL, ADD etc.) vbmenu_register("postmenu_176834", true);

For scaling, do I have to convert 4mA to 4000 and 20mA to 20000 like in SLC500?