Lenze EtherCAT control technology - Manual (Page 98)

Control technology | EtherCAT communication manual
EtherCAT function libraries
Properties of function blocks
98
L
DMS 3.1 EN 01/2011 TD17
9.3 Properties of function blocks
The function blocks are equipped with inputs and outputs for the activation of the POU,
the display of the current POU status, and for the output of error messages:
9.4 The EC_T_STATE structure
The ECAT_STATE structure describes all possible states of the EtherCAT bus system:
Input/output Data type Action
bExecute / bEnable BOOL bExecute and bEnable are edge-controlled:
In the case of a positive edge, the function block is executed.
bBusy BOOL As long as a function block is executed, bBusy is TRUE and bDone is FALSE.
bDone BOOL If a function block has been executed, bDone is set to TRUE and bBusy is set
to FALSE.
If bExecute/bEnable has been reset, bDone is only active during the function
block call. If bExecute/bEnable is TRUE, then bDone remains TRUE as long as
bExecute/bEnable is reset.
bError BOOL If an error has occurred, bError is set to TRUE.
dwErrorCode DWORD If an error has occurred (output bError = TRUE), a hexadecimal error code (see
also System error messages ( 157) ) is displayed at the output dwErrorCode.
The error code is only available during the function block call (if
bDone = TRUE).

Note!
The identifiers itemised here cannot be found in IEC 61131. For all state inputs
and outputs, always the numerical values are indicated.
Status Identifier Value (DINT)
Unknown eEcatState_UNKNOWN 0
Initialization eEcatState_INIT 1
Pre-Operational eEcatState_PREOP 2
Bootstrap Mode
(Is currently not supported.)
eEcatState_BOOT 3
Safe-Operational eEcatState_SAFEOP 4
Operational eEcatState_OP 8