Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 101)

4–9 Configure the Adapter for Master/Slave Communication
Publication 1794ĆUM057B-EN-P - November 2001
The identifier byte and its format are described in the following
illustration. This byte is defined in Part 3 of the PROFIBUS
standard.
7 6 5 4 3 2 1 0
Most Significant Bit Least Significant Bit
Bit Number
Length of data
00 1 byte resp. 1 word
•
•
•
15 16 byte resp. 16 words
input/output
00 specific identifier formats
01 input
10 output
11 input-output
length format 1
0 byte byte structure
1 word word structure
concistency over
0 byte or word
1 whole length
The maximum size of this identifier area is 17 bytes. If no FLEX I/O
modules are installed in the upper slots, the length may be less.
Consistency must be over a word.
Check Configuration Example
Check Configuration Message when used with Send Parameter Auto
Configure or Condensed Format (Length 10 bytes)
Name Identifier
Byte
Description
Octet 1: 50h Input Status Word (input - 1 word)
Octet 2: 60h Output Status Word (output - 1 word)
Octet 3: 51h Slot 1, input module 2 words
Octet 4: 60h Slot 1, output module 1 word
Octet 5: 00h Slot 2, input module empty
Octet 6: 60h Slot 2, output module 1 word
Octet 7: 57h Slot 3, input module 8 words
Octet 8: 60h Slot 3, output module 1 word
Octet 9: 50h Slot 4, input module empty
Octet 10: 65h Slot 4, output module 6 words
I/O sizes configured: 22 input bytes, 20 output bytes
Refer to your configuration tool publications for information on how
and where to enter this data.