LERP and FILTER

[RBPLC]

Would it be possible to combine LERP and FILTER into a single instruction? This would allow performing both actions without having to use an intermediate variable. Since both of these are commonly used with analog I/O, seems like it would be worthwhile to have them combined.

[BobO]

Would it be possible to combine LERP and FILTER into a single instruction? This would allow performing both actions without having to use an intermediate variable. Since both of these are commonly used with analog I/O, seems like it would be worthwhile to have them combined.

If we did we'd just be doing it as a macro with a dummy variable between them. Since the intermediate variable doesn't really need to be retained between scans, I'd personally just allocate a single R location, label it Scratch, and use it as the glue between every such operation in the PLC.

[franji1]

Would it be possible to combine LERP and FILTER into a single instruction? This would allow performing both actions without having to use an intermediate variable. Since both of these are commonly used with analog I/O, seems like it would be worthwhile to have them combined.

Another solution to smooth the analog value would be a CERP instruction, Cubic intERPretation, similar to what Do-more does in the AXCAM instruction.  We have talked about doing this instruction since we did AXCAM, but never implemented it.

Look at AXCAM editor to possibly see if a CERP instruction would be useful or not.