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PD-01 PROFIBUS-DP Module
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
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Example 3: Write data 2 to parameter P0804
To write data to P0804, request ID is set to 2 (Modify parameter value - word), Para
Page Select should be set because the parameter address is greater than 2000. The
address of P0804 is 0x0804, which is 2052 in decimal, if set Page Select to 1 (bit 15
of IND is 1), then the Basic PNU is 2052 – 1*2000 = 052 (0x34), thus, the data
sequence are as follows:
Master PD-01 : 2034800000000002 write data to P0804
PD-01 Master : 1034800000000002
Request Response
Word 1 (PKE) 2034 Word 1 (PKE) 1034
Word 2 (IND) 8000 Word 2 (IND) 8000
Word 3 (PWE1) 0000 Word 3 (PWE1) 0000
Word 4 (PWE2) 0002 Word 4 (PWE2) 0002
All parameters values in VFD series Drives are 16-bit, so the data may be transferred
in PWE2 (4th word).
NOTE:
VFD series Drives will write the data to EEPROM. When using PKW to change the
value of parameter, the data will be written to EEPROM directly. However, if this
action is too often, the EEPROM will have no capability of directly saving data.
So please pay close attention on it.
Example 4: Read diagnostic data
User can use the special address to read the current diagnostic data. Please refer to
Section 6.2 for details. The diagnostic address starts from 0x7500 to 0x7504 (5
words). To read diagnostic data in these addresses, request ID is set to 1, Para Page
Select should be set because the parameter address is greater than 2000. The
address 0x7500, which is 29952 in decimal, if set Page Select to 14, then the Basic
PNU is 29952-14*2000=1952(0x7A0), thus, the data sequence are as follows:
Master - > PD-01 : 17A0700000000000 read data from 0x7500
PD-01 - > Master : 17A0700000000300