EtherCAT:EC SDO WRITE DOUBLE
Similar to EC_SDO_WRITE, this subroutine allows writing DOUBLE values.
EC_SDO_WRITE_DOUBLE sends data to the slave over a specific SDO. We have to specify the SDO's index, and its sub-index, its size, and the new value that we would like to write to the slave.
The first sub-index is 0. If only one sub-index exists, we still have to specify 0 (we cannot omit this field).
 | IMPORTANT |
| At the moment only 32 bits variables can be written |
Input
Slave address, SDO index, SDO sub-index, SDO size in bits, the new value to be written.
Output
None
Return Value
Void
Declaration
public sub EC_SDO_WRITE_DOUBLE(byval slaveaddress as long, byval index as long, byval subindex as long, byval varSize as long, byval new_val as double)
Syntax
call EC_SDO_WRITE_DOUBLE(<Slave address>, <SDO index>, <SDO sub-index>, <SDO size in bits>, <new value>)
Exceptions
EC_SDO_READ_WRITE_DOUBLE - "SDO READ/WRITE DOUBLE ERROR: Invalid Size. Must be 32 or 64" 20071
EC_SDO_WRITE_READ_ONLY - "SDO WRITE ERROR: Attempt to write a read-only object" 20061
EC_WRITE_VAL_LOW - "SDO WRITE ERROR: Written value too low" 20062
EC_WRITE_VAL_HIGH - "SDO WRITE ERROR: Written value too high" 20063
EC_SDO_GENERAL_ERROR - "SDO WRITE ERROR: Check written value validity" 20065
EC_SDO_WRITE_INVALID_SIZE - "SDO WRITE ERROR: Invalid Bit Size" 20066
Examples
call EC_SDO_WRITE_DOUBLE(ax.Dadd, 0x2027, 0, 32, 96) ' Write CDHD kvp