Rockwell Automation Samsung NX-CPU700p, Руководство пользователя, Страница: 114 / 122

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Change the content of the words (R, L, M, K, F, or W) assigned to the absolute address.
Can read n consecutive words.
Query (Q) frame
Response (R) frame
Read the bits and/or word contents of the assigned absolute addresses.
Can read bits and words regardless of their order and location in memory.
Query (Q) frame
Response (R) frame
DA SA $24 L
Base
L H
Base+0word
L H
-
Base+1word
L H
CRC
L H
DA SA $A2 $01
&00
CRC
L H
DA SA $25 L
AO
L H
A1
L H
-
An
L H
CRC
L H
DA SA $A5 Lx
DO D1
L H
-
Dn
L H
CRC
L H
n word values from the base words requested by the Q.
Length L = Nx2+2
Assigning absolute address for bits
Absolute address for the K127 12th bit =$1BFC
Ax=0001 1011 1111 1010
Ax L=$FC, H=$1B
Assigning addresses for word
Absolute address for the K127 word =$01BF
Ax=0100 0001 1011 1111
Ax L=$BF, H=$41
For the A0, A1, ..., An requested by the Q, the
content D0, D1, ..., Dn of the word/bit is returned.
If Ax denotes a bit address, the Dx data is 1 byte
(On = $FF, Off = $00), and if Ax denotes a word
address, the Dx data is 1 word (2 bytes).
The size and location of the returned data
depends on the combination of bit/word
addresses requested. The Lx parameter
should be checked to verify data size.
Fixed
Method of assigning bit/word
absolute address
15 14 13 0
0 0 Absolute bit address
0 1 Absolute word address
1 X Not used
Ax=A0, A1, .., An Dx=D0, D1, .., Dn
Absolute Address(Bit/Word)
Write words
Read bits and words