The Method ReadByIndex reads the value of a POWERLINK Object addressed by Index and Sub-Index.
Signature
ReadByIndex (
[in]UInt16 Index
[in]Byte SubIndex
[out]BaseDataTypeData
[out]UInt32 PowerlinkAbortCode
);
|
Argument |
Description |
|
Index |
Index of the POWERLINK Object in the POWERLINK Object Dictionary |
|
SubIndex |
Sub-Index of the POWERLINK Object in the POWERLINK Object Dictionary |
|
Data |
Value of the POWERLINK Object |
|
PowerlinkAbortCode |
SDO Abort Code as defined in EPSG DS 301 Some of the SDO Abort Codes defined in POWERLINK are mapped to an OPC UA ResultCode, see table for ‘Method Result Codes’ |
Method Result Codes
|
ResultCode |
SDO Abort Code |
Description |
|
Good |
0 |
The read access was successful |
|
Bad_ResourceInvalid |
- |
The POWERLINK Device is not available, the output argument PowerlinkAbortCode will be set to 0x0504 0000 (timeout) |
|
Bad_NotFound |
0x0602 0000 |
Object does not exist in the POWERLINK Object Dictionary |
0x0609 0011 |
Sub-Index does not exist |
|
Bad_Timeout |
0x0504 0000 |
The operation timed out / SDO protocol timed out |
|
Bad_NotReadable |
0x0601 0001 |
Attempt to read a write-only POWERLINK Object |
|
Bad_CommunicationError |
All other SDO Abort Codes |
|