FB_WritePersistentData
The function block FB_WritePersistentData is an extended version of the WritePersistentData function block. The system behavior for writing the persistent data (data consistency/task cycle time overrun) can be influenced via the MODE parameter.
VAR_INPUT
VAR_INPUT
NETID : T_AmsNetId;
PORT : UINT;
START : BOOL;
TMOUT : TIME := DEFAULT_ADS_TIMEOUT;
MODE : E_PersistentMode;
END_VAR
NETID: This parameter can be used to specify the AmsNetID of the TwinCAT computer whose persistent data are to be saved (type: T_AmsNetID). If it is to be run on the local computer, an empty string can be entered.
PORT: The PORT parameter specifies the runtime system whose persistent data is to be stored.
START: the block is activated by a positive edge at this input.
TMOUT: States the length of the timeout that may not be exceeded by execution of the ADS command.
MODE : Mode in which the persistent data are to be written (type: E_PersistentMode).
VAR_OUTPUT
VAR_OUTPUT
BUSY : BOOL;
ERR : BOOL;
ERRID : UDINT;
END_VAR
BUSY: When the function block is activated this output is set. It remains set until a feedback is received.
ERR: If an error should occur during the transfer of the command, then this output is set once the BUSY output was reset.
ERRID: Supplies the ADS error number when the ERR output is set.
Example:
See: Writing of persistent data: system behavior.
See: Example in the documentation for the WritePersistentData function block.
Requirements
Development environment |
Target platform |
PLC libraries to be integrated (category group) |
---|---|---|
TwinCAT v3.1.0 |
PC or CX (x86, x64, ARM) |
Tc2_Utilities (System) |