RS Logix 500 Thinking of using a DCD Instruction

[Rob S.]

I am replacing a old plc in some used equipment. I would like to keep the drawings close to the same,and the control
wiring the same. I have a Thumbwheel switch and I would like
to use a DCD instruction and look at Inputs I:0/10,I:0/11,
I:0/12, I:0/13. What would be the best way to see those 4 input bits? Would I need to use a MOV ,and how would I represent a input byte or input word in a intruction.
I should know this stuff. I can't remember nothing,anymore.

 

[bernie_carlton]

Brute force:

CLR an N7 register

I:0/10 to N7:x/0
I:0/11 to N7:x/1 etc

DCD using N7:x

 

[Rob S.]

Thanks Mr.Carlton ,

I placed a MOV instruction

Source I:0/10

Dest N7:0

I keep getting : address must be specified to the word level

How would I represent the source to the "word level"

Thanks,

 

[bernie_carlton]

See attachment

 

[Rob S.]

Thanks,that makes sense.I just was not thinking.