Emerson SI-PROFIBUS

Unidrive M SI-PROFIBUS User Guide 89
Issue Number: 3
Safety
information
Introduction
Mechanical
installation
Electrical
installation
Getting
started
Parameters
GSD
Files
Cyclic data
Non-cyclic
data
Control and
status words
Diagnostics
PROFIdrive
profile (V4)
Advanced
features
Legacy
features
Glossary of
terms
Index
TELEGRAM 5
The fifth telegram from the PROFIBUS-DP master acts as the indication to the slave to
send the mid-low data byte from the requested parameter. The data byte is not used in
this telegram and should be set to 0.
Example telegram
Data word = 0x9500
Stamp number = 5
When the fifth telegram has been received and processed in the slave node, the node
will mirror the stamp number in the non-cyclic IN word and load the mid-low byte of the
parameter value into the data byte.
Example response
Data word = 0x9525
Stamp number = 5
Data mid-low byte = 0x25 = 37
TELEGRAM 6
The sixth telegram from the PROFIBUS-DP master acts as the indication to the slave to
send the low data byte from the requested parameter. The data byte is not used in this
telegram and should be set to 0.
Example telegram
Data word = 0x9600
Stamp number = 6
When the sixth telegram has been received and processed in the slave node, the node
will mirror the stamp number in the non-cyclic IN word and load the low byte of the
parameter value into the data byte.
Example response
Data word = 0x96DC
Stamp number = 6
Data low byte = 0xDC = 220
Bit b15-b12 b11-b8 b7-b4 b3-b0
Value 1001 0101 0000 0000
Bit b15-b12 b11-b8 b7-b4 b3-b0
Value 1001 0101 0010 0101
Bit b15-b12 b11-b8 b7-b4 b3-b0
Value 1001 0110 0000 0000
Bit b15-b12 b11-b8 b7-b4 b3-b0
Value 1001 0110 1101 1100