Rockwell Automation 1779-KP3R DATA HIGHWAY II User Manual
Page 47
Programming
Chapter 3
3Ć12
Addressing a Block of Words
This section provides examples of addressing a block of words in each
PLC–2, PLC–3, and PLC–5 memory.
To
address a
block of
words in:
Use this format:
Examples:
PLC-2
memory
$wordaddr,size
$010,22 (specifies 22 words beginning with the
address 010).
The maximum number of words you can specify with
the size parameter is 65,535 for MOVE command.
For TMOVE, the maximum is 18 (if wordaddr is less
than 127) and 17 (if wordaddr is greater than 127).
PLC-3
memory
$fileaddr:wordaddr,size
or
$extaddr,size
$A1:0,1024 (specifies 1024 words starting at word 0
of ASCII file 1)
$E3.1.9.1.0.0, 1024 ( specifies 1024 words starting at
word 0 to ASCII file 1).
The maximum number of words you can specify with
the size parameter is 65,535 for MOVE command.
For TMOVE, the maximum is based on the following
chart (all values in decimal).
File:
Word:
Maximum:
0
0
18
0
0 < word
≤
254
17
0
0 < word
≤
254
16
0 < file
≤
254
word
≤
254
17
file > 254
word
≤
254
16
0 < file
≤
254
word > 254
16
file > 254
word > 254
15
PLC-5
memory
$extraddr,size
$E0.10.1.0,10 specifies 10 words beginning with word
1 of file 10.
Addressing Immediate-access Block Numbers
There are 16 immediate–access blocks of 42 bytes in length in every KP3
or KP2 module. To address them you ‘‘specify & digit”, where digit can
be from 0 to 15. When you define an immediate–access block, you are
setting aside an area in the KP3 that will be updated (via the TMOVE
command) with data from a specified area in the PLC–3 memory.