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Control technology | EtherCAT communication manual
EtherCAT function libraries
Function blocks and functions for master/slave states
104 L DMS 3.1 EN 01/2011 TD17
Inputs (VAR_INPUT)
Outputs (VAR_OUTPUT)
Identifier/data type Meaning/possible settings
bEnable
BOOL
The function block is activated in an edge-controlled manner:
Positive edge (TRUE) = function block is executed.
wSlaveStationAddress
WORD
Station address of the slave
Designation in the EtherCAT configurator: "EtherCAT address"
Designation in the EtherCAT specification and parameter reference: "Physical
address".
pwNewReqDevState
WORD
Requested state
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.
Identifier/data type Meaning/possible settings
bDone
BOOL
FALSE: Function block is active or has not been called
TRUE: Function block has been executed.
bBusy
BOOL
FALSE: Function block is not active.
TRUE: Function block is active.
bError
BOOL
FALSE: No error
TRUE: An error has occurred.
dwErrorCode
DWORD
Display of a hexadecimal error code (see also System error messages
( 157)) if an
error has occurred (bError =TRUE).
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