Nasi program question pls help

Dear all,

What is the meaning R 1011, R 4A in the program?
it is not internal relay, not the I/O points, because the DI is X, DO is Y.


What is difference between WR and R ?

Just i know, K and H means constant

but e.g. [F0 MV , K 30 , DT 1] means DT 1 = 30 OR
DT 1 = K 30 Content ?

same case as [F0 MV , H 8001 , DT 350]?


pls help me
thx

'R' signifies internal register bits in the NAIS PLC. 'WR' indicates a group of registers read as a word.