finding greatest

[Jnelson]

Terry,

Is there some purpose to the dummy bits at the end of the rungs?

I understand what you are doing but don't see what the purpose of the dummy bits are.

Is it just used as an indicator as to which timer's acc was greatest during the scan?

 

[Terry Woods]

"Dummy Bits"

Some PLC's require that you actually affect an output even if all you are doing is data manipulation. If I don't need to set "traps" in the manipulation routine then I simply use a "Dummy Bit".

My "Dummy Bit" is C1500. I have many of those throughout the program.

The bit does nothing more than serve the purpose of satisfying the requirement of addressing some sort of output bit.

I suppose I could just as easily use a NOP (No-Operation).