IOF_GetBoxNetId
Some boxes (slave modules) can be assigned an AmsNetId during the configuration in the TwinCAT System Manager. The AmsNetId can then be used to execute firmware functions on the box. The function block IOF_GetBoxNetId can be used to determine the AmsNetId using the master's device ID and either the fieldbus address or the logical address in the fieldbus. The device IDs are specified during configuration by the TwinCAT System Manager, and can not be configured by the user. Internally to the function block an instance of the ADSRDWRT function block is called.
VAR_INPUT
VAR_INPUT
NETID : T_AmsNetId;
DEVICEID : UDINT;
BOXADDR : WORD;
START : BOOL;
TMOUT : TIME;
END_VAR
NETID: It is possible here to provide the AmsNetId of the TwinCAT computer on which the function to be executed. If it is to be run on the local computer, an empty string can be entered.
DEVICEID: The master's device ID.
BOXADDR: The fieldbus address, or the logical address of the box (slave module)whose AmsNetId is to be read.
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;
BoxNetId : T_AmsNetId;
END_VAR
BUSY: 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.
BoxNetId: The AmsNetId of the box as a string
Requirements
Development environment | Target system type | IO hardware | PLC libraries to include |
---|---|---|---|
TwinCAT v2.7.0 | PC (i386) | All IO boxes with NetID | Standard.Lib; PLCSystem.Lib; TcPLCAds.Lib; TcPlcIoFunctions.Lib |
TwinCAT v2.8.0 | PC (i386) | All IO boxes with NetID | TcIoFunctions.Lib ( Standard.Lib; TcBase.Lib; TcSystem.Lib; TcUtilities.Lib are included automatically ) |