Leroy-Somer digitax st User Manual page 40

TELEGRAM 3
The third telegram from the PROFIBUS-DP master has the stamp number set to 3. The
data bits contain the high data byte for the parameter being written to.
Example telegram
Bit
Value
Data word = 0x1300
Stamp number = 3
Data high byte = 0x00
When the third telegram has been received and processed in the slave node, it is
mirrored in the non-cyclic IN word. This is the signal to the master controller program
that the third telegram of the message has been received and understood and the fourth
telegram can be transmitted.
TELEGRAM 4
The fourth telegram from the PROFIBUS-DP master has the stamp number set to 4.
The data bits contain the mid-high data byte for the parameter being written to.
Example telegram
Bit
Value
Data word = 0x1401
Stamp number = 4
Data mid-high byte = 0x01 = 1
When the fourth telegram has been received and processed in the slave node, it is
mirrored in the non-cyclic IN word. This is the signal to the master controller program
that the fourth telegram of the message has been received and understood and the fifth
telegram can be transmitted.
TELEGRAM 5
The fifth telegram from the PROFIBUS-DP master has the stamp number set to 5. The
data bits contain the mid-low data byte for the parameter being written to.
Example telegram
Bit
Value
Data word = 0x15EA
Stamp number = 5
Data mid-low byte = 0xEA = 234
When the fifth telegram has been received and processed in the slave node, it is
mirrored in the non-cyclic IN word. This is the signal to the master controller program
that the fifth telegram of the message has been received and understood and the sixth
telegram can be transmitted.
40
b15-b12 b11-b8
0001 0011
b15-b12 b11-b8
0001 0100
b15-b12 b11-b8
0001 0101
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b7-b4 b3-b0
0000 0000
b7-b4 b3-b0
0000 0001
b7-b4 b3-b0
1110 1010
SM-PROFIBUS DP-V1 User Guide
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