Ask everyone about the NEG directive,CJ1H-CPU67H
Questions such as the following picture in the red box: After the NEG command is used, the source word S assignment D243=1000 displays the result word "D D428=64356" Could you tell me why

Is there a OMRON camera that automatically captures smiley faces, called "smile measuring software" CJ2H-CPU67?
67?

Which alternative is E3MC-A11 discontinued?CJ2H-CPU67-EIP
E3MC-A11 discontinued, with which products instead? What's the difference between alternatives?