Scale Command in Mitsubishi PLC?

[netdomain]

Hi all, I want to scale my analog value from 0 to 10 volts to 0 to 70 PSI. I have dealt with Allen Bradley where I used a Scale Command to do that. How do I do this in Mitsubishi? Any Scale Command or similar? Thanks

[504bloke]

It depends on the PLC I just used an FX2N on a Job with the 8AD fitted and on this you would set the module up to read the data direct into the plc in whatever units you required ie 0-70 or 0 to 7000 (implied dp 70.00) The 8AD was set up with the FROM / TO Commands

[Crossbow]

There is no dedicated command for scaling. Typically I convert the numbers to floating point, determine the multiplier (like 70/2000 if as you stated value is 0-70 (and input module value is 0-2000), then multiply the unscaled value by that decimal value. Convert input to floating point with [FLT D0 D8] (if D0 is where you store it) So 0-2000 scaled to 0-70 would be 0.035. Use a calculator or put it in code as [E/ K70 K2000 D10] Then multiply your incoming value by that 0.035 and you'll have a scaled value. [E* D8 D10 D12] You can always then convert that number to integer with the INT command. [iNT D12 D1] Then D1 contains an accurately scaled (but rounded) integer value. D12 contains an accurately scaled floating point number.