Leroy-Somer digitax st User Manual page 46

Table 8.14 shows an example set of data words for PPO 4 Word mode. This example
will read the value in the post ramp speed reference (Pr 2.01) in the drive.
Table 8.14 PPO 4 Word read request example
OUT data
word
OUT word 0
OUT word 1
OUT word 2
OUT word 3
Table 8.15 shows an example successful read response to the read instruction
illustrated above. The value returned is 15284, which equates to 1528.4 rpm.
Table 8.15 PPO 4 Word read response example
IN data word
IN word 0
IN word 1
IN word 2
IN word 3
It is important that the correct module is selected from the GSD file to ensure that the
NOTE
PPO 4 word mode block is consistent otherwise data skew may occur.
If the OUT data words 0 and 1 are left at the same value, the target parameter will be
read or written to (depending on the TASK ID) on every data cycle.
If the PPO 4 command is left in the data words, the read will be executed on every poll
of the network, effectively providing a continuous read. Care should be taken to ensure
the parameters for the read are setup before the TASK ID is changed from 0 to prevent
incorrect data in the returned value.
46
Hex value
b15-b12
0x6002 TASK ID = 6
0x0100 PARAMETER = 1
0x0000
0x0000
Hex value
b15-b12
RESPONSE
0x5002
ID = 5
0x0100 PARAMETER = 1
0x0000
0x3BB4
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Function
b11 b10-b8
0 MENU = 2
DATA HIGH word = 0
DATA LOW word = 0
Function
b11 b10-b8
0 MENU = 2
DATA HIGH word = 0
DATA LOW word = 15284
SM-PROFIBUS DP-V1 User Guide
b7-b0
0
b7-b0
0
Issue : a