PLC_Start
The function block "PLC_Start" can be used to start a PLC run-time system on a TwinCAT computer. The function block can, for instance, be used to start the PLC on a remote PC.
Internally, an instance of the ADSWRTCTRL function block is called.
VAR_INPUT
VAR_INPUT
NETID :T_AmsNetId;
PORT :T_AmsPort;
START :BOOL;
TMOUT :TIME := DEFAULT_ADS_TIMEOUT;
END_VARNETID: It is possible here to provide the AmsNetId of the TwinCAT computer on which the PLC is to be started. If the PLC is to be started on the local computer, an empty string can be entered.
PORT: Contains the ADS port number of the PLC run-time system that is to be started. The first PLC run-time system, for example, has port number 801, and the second has port number 811.
START: The function 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.
VAR_OUTPUT
VAR_OUTPUT
BUSY :BOOL;
ERR :BOOL;
ERRID :UDINT;
END_VARBUSY: When the function block is activated this output is set. It remains set until and acknowledgement is received.
ERR: If an ADS error should occur during the transfer of the command, then this output is set once the BUSY output is reset.
ERRID: Supplies the ADS error number when the ERR output is set.
Requirements
Development environment | Target system type | PLC libraries to include |
|---|---|---|
TwinCAT v2.7.0 | PC or CX (x86) | Standard.Lib; PLCSystem.Lib; TcPLCAds.Lib; PLCHelper.Lib; TcPlcUtilities.Lib |
TwinCAT v2.8.0 | PC or CX (x86) | TcUtilities.Lib ( Standard.Lib; TcBase.Lib; TcSystem.Lib are included automatically ) |
TwinCAT v2.10.0 Build >= 1301 | CX (ARM) |