Nidec SI-Interbus 2 MBd, User Manual

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SI-INTERBUS User Guide
51
Issue Number: 1
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Table 8-13 PPO 4 Word Read TASK ID and RESPONSE ID combinations
Table 8-14 PPO 4 Word read request example shows an example set of data words
for PPO 4 Word mode. This example will read the value of the post ramp speed
reference (Pr
2.001 ) in the drive.
Table 8-14 PPO 4 Word read request example
Table 8-15 PPO 4 Word read response example shows an example of a 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
Function TASK ID RESPONSE ID Message Status
No task 0 0 No non-cyclic transaction active.
Request parameter
value (16-bit)
6 4
Parameter read successfully, 16-bit value
returned in word 3.
Request parameter
value (32-bit)
6 5
Parameter read successfully, 32-bit value
returned in words 2 and 3.
Request parameter
value (16-bit)
6 7
TASK ID 6 could not be executed.
Check the error code in IN word 3 for the
reason why.
Request Last
Parameter
Reference 9 6
The highest parameter reference in
specified menu is available in IN word 3.
Request Last
Parameter
Reference 9 7
TASK ID 9 could not be executed. Check
the error code in IN word 3 for the reason
why.
OUT Data
Word
Hex
Value
Function
b15 to b12 b11 b10 to b8 b7 to b0
OUT Word 0 0x6002 TASK ID = 6 0 MENU = 2
OUT Word 1 0x0100 PARAMETER = 1 0
OUT Word 2 0x0000 DATA HIGH word = 0
OUT Word 3 0x0000 DATA LOW word = 0
OUT Data
Word
Hex
Value
Function
b15 to b12 b11 b10 to b8 b7 to b0
IN Word 0 0x5002 RESPONSE ID = 5 0 MENU = 2
IN Word 1 0x0100 PARAMETER = 1 0
IN Word 2 0x0000 DATA HIGH word = 0
IN Word 3 0x3BB4 DATA LOW word = 15284
It is important that the correct module is selected from the XML file to ensure that the
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.
NOTE
NOTE