
Command
1st byte
Data length Info
hex
dec
Read response
0x43
67
4 bytes
Inverter response to a read request with the current parameter value.
0x4B
75
2 bytes
0x4F
79
1 byte
0x41
65
Block
Error response
0x80
128
4 bytes
Inverter response to the incorrect execution of the read/write request.
More precisely, the command byte comprises the following information:
Command
1st byte
Command specifier (cs)
Toggle (t)
Length*
e
s
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write request
0
0
1
0
0/1
0/1
1
1
Write response
0
1
1
0
0
0
0
0
Read request
0
1
0
0
0
0
0
0
Read response
0
1
0
0
0/1
0/1
1
1
Error response
1
0
0
0
0
0
0
0
*Bit coding of the length: 00 = 4 bytes, 01 = 3 bytes, 10 = 2 bytes, 11 = 1 byte
e: expedited (shortened block service)
s: segmented (normal block service)
More commands are defined in the DS301 V4.02 CANopen specification (e.g. segmented
transfer).
Maximally 4 bytes are available for parameter value entries. Depending on the data format,
they are assigned as follows:
5th byte
6th byte
7th byte
8th byte
Parameter value (1 byte)
0x00
0x00
0x00
Parameter value (2 bytes)
0x00
0x00
LOW byte
HIGH byte
Parameter value (4 bytes)
LOW word
HIGH word
LOW byte
HIGH byte
LOW byte
HIGH byte
The parameter attribute list in the annex also specifies a scaling factor. The scal-
ing factor is relevant to the transmission of parameter values which are repre-
sented with one or several decimal positions in the parameter list. If the scaling
factor is > 1, before the transmission, the value must be multiplied with the scal-
ing factor specified, so that the value can be transferred completely (as an inte-
ger value). On the SDO-client side, the integer value must then be divided by the
scaling factor again, in order to receive the original value with decimal positions.
4
Parameter attribute list
^
229
Parameter
Name / value range / [default setting]
Info
0x1200:000
SDO1 server parameter: Highest subindex
•
Read only
0x1200:001
SDO1 server parameter: COB-ID client -> server (RX)
•
Read only
Display of the receive identifier for SDO server channel 1 (basic SDO
channel).
•
According to DS301 V4.02, the basic SDO channel can neither be
changed nor deactivated.
0x1200:002
SDO1 server parameter: COB-ID server -> client (TX)
•
Read only
Display of the transmit identifier for SDO server channel 1 (basic SDO
channel).
•
According to DS301 V4.02, the basic SDO channel can neither be
changed nor deactivated.
0x1201:000
SDO2 server parameter: Highest subindex
•
Read only
Configuring the network
CANopen
CANopen service data objects
123
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