Leroy-Somer digitax st User Manual page 48

Table 8.17 shows an example set of data words for PPO 4 Word mode. This example
will write a value of 1553.9 rpm (32-bit value is 15539) to the digital speed reference 1
(Pr 1.21) to the drive.
Table 8.17 PPO 4 Word write request example
OUT data
word
OUT word 0
OUT word 1
OUT word 2
OUT word 3
Table 8.18 shows an example successful write response to the write instruction
illustrated above in Table 8.17.
Table 8.18 PPO 4 Word write response example
IN data word
IN word 0
IN word 1
IN word 2
IN word 3
If the PPO 4 command is left in the data words, the write will be executed on every poll
NOTE
of the network, effectively providing a continuous write. Care should be taken to ensure
the parameters for the write are setup before the TASK ID is changed from 0 to prevent
incorrect data being written.
48
Hex value
b15-b12
0x8001 TASK ID = 8
0x1500 PARAMETER = 21
0x0000
0x3CB3
Hex value
b15-b12
RESPONSE
0x5001
ID = 5
0x1500 PARAMETER = 21
0x0000
0x3CB3
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Function
b11 b10-b8
0 MENU = 1
DATA HIGH word = 0
DATA LOW word = 15539
Function
b11 b10-b8
0 MENU = 1
DATA HIGH word = 0
DATA LOW word = 15539
SM-PROFIBUS DP-V1 User Guide
b7-b0
0
b7-b0
0
Issue : a