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Control technology | EtherCAT communication manual
EtherCAT function libraries
Function blocks for CANopen over EtherCAT (CoE)
122 L DMS 3.1 EN 01/2011 TD17
9.8 Function blocks for CANopen over EtherCAT (CoE)
The function blocks described in the following support the upload and download of CoE
parameters:
ecatCoeSdoDownloadReq (FB)
( 122)
ecatCoeSdoUploadReq (FB) ( 123)
9.8.1 ecatCoeSdoDownloadReq (FB)
Inputs (VAR_INPUT)
Function: This function block activates the download of a CoE parameter to the
slave.
Library: AtEm.lib
Visualisation: VISU_ecatCoeSdoDownloadReq
Identifier/data type Meaning/possible settings
bExecute
BOOL
The function block is activated in an edge-controlled manner:
Positive edge (TRUE) = function block is executed.
wObIndex
WORD
CANopen index
The indexes for codes can be calculated with 16#5FFF
hex
-code number.
byObSubIndex
BYTE
Object subindex
dwTimeout
DWORD
Time-out in milliseconds
If the action could not be carried out successfully after time-out, bError is set
to TRUE.
The time required for the action depends on the structure of the EtherCAT
network.
wSlaveStationAddress
WORD
Station address of the slave
Designation in the EtherCAT configurator: "EtherCAT address"
Designation in the EtherCAT specification and parameter reference: "Physical
address".
dwDataLen
DWORD
Number of the data bytes to be written
pbyData
POINTER TO BYTE
Pointer to the service data object (SDO) to be written
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