Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 105)

Read/write image data
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Example: Read local inputs IW0
The values Data 1 = C4 and Data 2 = 02 indicate that the
inputs I8, I7, I3 and I10 have been set to 1.
Byte Meaning Value (hex), sent by
Master Slave
0 Toggle byte 81 80
1 Command: Read 91 –
Response: Read
successful
– C2
2 Len 02 02
3 Type 01 01
4 Index 00 00
5 Data 1 00 C4
6 Data 2 00 02
7 Data 3 00 00
8 Data 4 00 00
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All values must be transferred as hexadecimal values.