The following table shows the data format of the SDO response message.
PLC device
Message Header
D24002 Type Node ID
Message Data
D24004 Reserved Sub-index
D24005 Datum 1 Datum 0
D24006 Datum 3 Datum 2
D24007~D24031 Reserved
Status code:
The following table lists the status code values in the response message.
0 No data transmission request
SDO message transmission succeeds.
SDO message is being transmitted.
Error: SDO transmission time-out
Error: Illegal command code
Error: the length of the transmitted data is illegal.
Error: the length of the response data is illegal.
Error: Equipment to be sent messages is busy.
9 Error: Incorrect node address
0A Error message (See the error code for SDO response message)
ResID: the same as the request ID in the request message.
Size: the length of the message data, maximum of 20 bytes. The unit is bytes. When writing, the
maximum is four; the data length is decided by the data type of index and subindex when reading.
Node ID: the node address of the target equipment on CANopen network.
Type: in the SDO response message, 43 (Hex) refers to reading four bytes of data; 4B (Hex) refers to
reading two bytes of data; 4F (Hex) refers to reading one byte of data; 60 (Hex) refers to writing 1/2/4
byte(s) of data; 80 (Hex) refers to stopping SDO command.
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