[SOLVED WITHOUT SCL FUNCTION] What i'm doing wrong with SCLP in GXWorks2

[Rodrigo Balsalobre 1]

Hello !

I'm programming an LE3U plc, similar to FX3U plc from mitsubishi. They both use the same software to program, GX Works2. I'm trying to put the value from a pressure sensor on a scale using SCL, but as you can see the value from the port aren't converting on my scale table. What i'm doing wrong? The clp identificate as 770(4mA) 3860(20mA) and I'm trying to convert that into 0(4mA) 250(20mA). On the next image, you can see that i'm sending 20mA on this AI, and D0 reaches the maximum, and that is right, but isn't doing the scale..

Edited 14 Jan 2021 by Rodrigo Balsalobre

[panic mode 246]

you are supposed to initialize the table before you call SCL instruction. this way any accidental changes by other instructions will not cause table corruption whic is indicated by 0 values of the table points.

never used SCL but manual shows that there are five table points while you only have 2 (not sure if that is ok). assuming that following D registers are also zero values, and that max input value should correspond to last point i could see the PLC having problem with it and gives you result you asked for, not the one you wanted...

 

[Rodrigo Balsalobre 1]

12 hours ago, panic mode said:

you are supposed to initialize the table before you call SCL instruction. this way any accidental changes by other instructions will not cause table corruption whic is indicated by 0 values of the table points.

never used SCL but manual shows that there are five table points while you only have 2 (not sure if that is ok). assuming that following D registers are also zero values, and that max input value should correspond to last point i could see the PLC having problem with it and gives you result you asked for, not the one you wanted...

 

Ty for the reply!
 As you can see, the number of points is represented by the first line of the table

I tried your method, putting the SCL as the final line, using and not using the first line as the number of point but still dsn't working.

USING SLC AS THE FIRST LINE

 

USING THE SCL AS THE LAST LINE LINE

here is when I use your method with the first line as the number of points. I tried without this first line and 5 points like you did, but stil dsn't work

Edited 14 Jan 2021 by Rodrigo Balsalobre

[Rodrigo Balsalobre 1]

If you can't help me with SCL anymore, could you please give me another solution for that I want?

[Rodrigo Balsalobre 1]

SOLVED ! For some reason, the SCL function just can't work for me, searching for this, I found your equation in another post, the UNIVERSAL EQUATION FOR SCALLING, "out = (in-in_low)*(out_hi-out_lo)/(in_hi-in_low) + out_low". Thank you for the help!

[glavanov 40]

Try this:

Tested with Fx3U and Fx5U CPUs...

 

 

Edited 14 Jan 2021 by glavanov