ProSoft Technology 3170-PDP - Manual (Page 59)

Configure the Adapter for Master/Slave Communication 3170-PDP ♦ FLEX Platform
FLEX I/O™ PROFIBUS Adapter
ProSoft Technology, Inc. Page 59 of 152
August 23, 2007
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
w
w
w
15 16 byte resp. 16 words
input/output
00 specific identifier formats
01 input
10 output
11 input-output
length format1
0 byte byte structure
1 word word structure
concistency over
0 byte or word
1 whole length
1 When transferring words, PROFIBUS DP transfers the high byte first, followed by the low byte. If word structure is entere
in the column format the DP master has the possibility to swap the bytes within the word, if required by the target system.
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: 50h Slot 1, input module 1 word
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: 58h Slot 3, input module 9 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 the configuration example to understand how and where to enter this
data.