Data Area
In general, TcCOM objects can contain data areas that can be used by the environment (e.g., by a PLC instance or by the TwinCAT I/O area). For TwinCAT MC3 TcCOM objects, you have a choice of data structures to use via the Data Area tab.
PulseTrain Drive / PulseTrain Inputs
Enable (default) | Name | Type | Description |
|---|---|---|---|
| WcState | BIT | Working counter |
| InputToggle | BIT | Level change upon receipt of a new telegram |
| Counter value | UDINT | Meter reading |
| ENC Sync error | BIT | The Sync error bit is required only for distributed clocks mode and indicates whether a synchronization error occurred during the previous cycle. |
| ENC TxPDO State | BIT | Validity of the data in the associated TxPDO (0=valid, 1=invalid). |
| ENC TxPDO Toggle | BIT | The TxPDO toggle is set by the slave when the data in the corresponding TxPDO has been updated. |
| DcInputShift | DINT | Used for dead-time compensation of the drive. |
| DcOutputShift | DINT | Used for dead-time compensation of the drive. |
PulseTrain Drive / PulseTrain Outputs
Enable (default) | Name | Type | Description |
|---|---|---|---|
| PTO Automatic direction | BIT | The terminal selects the direction of travel based on the position difference (actual and target values) in such a way that the shorter distance is preferred. |
| Target counter value | UDINT | Target meter reading |
Notice | |
Warning in the error log window caused by selected entries that are not linked to an I/O device Entries in the data areas of drive and encoder objects that are enabled (Enable = True) but are not linked to the I/O drive object result in a warning in the error log window. If the link for a function used at runtime is missing, this results in a runtime error. For example, an axis cannot be started if the status word from the I/O drive object is not linked.
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