NORD Drivesystems BU0060 - Manual (Page 61)

4 Communication and Protocol
BU 0060 GB-4112 61
Transmitting parameter data via SDO
Transmission of parameter data = Writing a parameter value into the frequency inverter.
Example: Parameter P102 (acceleration time), 1.03s
Control
byte
Index Sub-index Data
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
0x2B 0x66 0x20 0x01 0x67 0x00 0x00 0x00
Data à user data (Parameter value):
The values of the selected parameter are transferred
in this area.
16 Bit value: 67 00 00 00
(1.03s = 103
dec
= 0067
hex
)
32 Bit value: 76 BC 2A 00
(2800,758rev = 2800758
dec
= 002ABC76
hex
)
Sub-Index à Parameter index or array value:
The selected parameter set and the array element of the parameter
are coded in this area.
For parameters which neither depend on parameter sets nor consist
of array elements, the sub-index is 00
hex
For all other cases, the following overview applies:
Column 1 2 3 4
Row P-set 1 P-set 2 P-set 3 P-set 4
1 Array [-01] 0x01 0x02 0x03 0x04
2 Array [-02] 0x05 0x06 0x07 0x08
3 Array [-03] 0x09 0x0A 0x0B 0x0C
4 Array [-04] 0x0D 0x0E 0x0F 0x10
… …
Index à Parameter number of the frequency inverter:
The parameters are mapped in the area above 2000
hex
:
Parameter P102 = 102
dec
=66
hex
à 2000
hex
+ 66
hex
= 2066
hex
à 66 20
The control byte à specifies the data length and the order:
0x2B = Transmit 16 bit value
0x23 = Transmit 32 bit value
Response
0x60 =
Error-free telegram received
Any other response corresponds to a termination of parameter communication.
Table 16: Transmitting parameter data via SDO
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Loading parameter data via SDO
Loading of parameter data is carried out in a similar manner to the transmission of parameter data.
For this, the master sends a read order (control byte 0x40) to the frequency inverter, which specifies
which parameter and which array or which parameter set is to be read out. The data area remains
empty (everything 0).
The response telegram corresponds to the order telegram, whereby the status byte specifies the
length of the response data (response 16/32 bit) and the data area which contains the parameter
value which has been read out.