Analog Selector Function in Ladder Logic

Hi everyone, I have several cases where I need to select analog input A, B or greater of the two. Also I need to select PID output A, B or greater of the two. Function blocks are no problem but how can you perform this in ladder format. I am using AB RSlogix 5000 as programming tool.

Check out MOVe and GRT commands

What you are looking for is referred to as a "high select"
it's quite simple. 1st, your 2 PID outputs (A and B) will need to be saved to data points, not directly to the output (C)
then we can compare data like "the msp" said.
A>B? Mov A into C.
B=>A? Mov B into C.
(The equal or greater is used the 2nd time to ensure that when a=b the output can still change)