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.

CoE DS408 Drive (hydraulic) / DS408 Inputs

Enable (default)

Name

Type

Description

Data Area 1:

Status word

UINT

Status information

Data Area 2:

Valve Act Spool Position

INT

Current position of the valve slide

Data Area 3:

WcState

BIT

Working counter

Data Area 4:

InputToggle

BIT

Level change upon receipt of a new telegram

CoE DS408 Drive (hydraulic) / DS408 Outputs

Enable (default)

Name

Type

Description

Data Area 5:

Control word

UINT

Control information

Data Area 6:

Valve Set Spool Position

INT

Target position of the valve spool

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.

  • Link the required entries for the interface between the axis and the I/O device
  • Deselect the entry that is not required to avoid generating a warning.