Communication extension card
CANopen communication card
-26-
For example, if the "inverter unit phase U protection (OUT1)" fault occurs on the Goodrive350
VFD whose node ID is 3, and the fault type is 1 (that is, the VFD error code is 1), the
communication card transmits the following emergency packet.
COB-ID
Emergency
error code
Error
register
VFD error code
Byte0
Byte1
Byte2
Byte3
Byte4
Byte5
Byte6
Byte7
0x83
0x00
0x30
0x04
0x01
0x00
0x00
0x00
0x00
As you can see in the command, the emergency error code is 0x3000, indicating a voltage
error. The error register is 0x04, that is, the second bit is "1", indicating a voltage error. The
device error code is 0x0000000001. See the Goodrive350 VFD operation manual, and you
can find that the error code 1 indicates the "inverter unit phase U protection (OUT1)" fault.
After the fault is reset, the communication card transmits the following emergency packet to
notify the master station that the slave station is no longer faulty.
COB-ID
Emergency
error code
Error
register
VFD error code
Byte0
Byte1
Byte2
Byte3
Byte4
Byte5
Byte6
Byte7
0x83
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
3.4.9 Service data object (SDO)
SDOs are mainly used to transmit non-time key data. By using SDOs, the master station can
read data from and write data to the object dictionary of a device.
Command
Request: master station -> slave station
COB-ID
Byte0 Byte1 Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x600+NodeID
Request
code
Object index
Subindex
Response data
LSB
MSB
bit7-0 bit15-8 bit23-16 bit31-24
Response: Slave station -> master station
COB-ID
Byte0 Byte1 Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x580+NodeID
Respons
e code
Object index
Subindex
Response data
LSB
MSB
bit7-0 bit15-8 bit23-16 bit31-24
Description
An object index is two bytes. Byte1 is the LSB, and Byte2 is the MSB. For information about
the indexes and subindexes, see the object dictionary in the appendix. Request codes include
request codes for reading and those for writing.
Request codes for writing vary according to the character length of items in the object
dictionary, and the request code for reading are 0×40. See Table 3-8.
Содержание Goodrive350 Series
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