Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 User Manual
Page 160
Binary Command Language
Appendix A
A-32
The data bytes store the data word:
first size byte (08 hex)
second size byte (28 hex)
third size byte (00 hex)
fourth size byte (00 hex)
first byte of next level’s word (19 hex)
second byte of next level’s word (00 hex)
If any other response code is returned, no data follows.
Create Command
Hex: 17
Parameters: Address of the last word, structure, file or section.
Description: The following example command block creates 10 words in
integer file 5 (if integer file 6 does not already exist):
STX
02
ISC
0C
SIZ
06
CMD
17
3C
05
DAT
05
00
0A
ETX
03
CHK
7E
The data bytes store:
address mask (3C hex)
first address byte (section) (05 hex)
second address byte (file) (05 hex)
third address byte (structure) (00 hex)
fourth address byte (word) (0A hex)
If the words have already been created, the processor sends an available
response code (02 hex). The command also tells the processor to create the
pointers for integer files 0 thru 4 if they did not already exist, although no
words are allocated to these files.